Publications – Institut für Photonik – Leibniz University Hannover

Exceptional points and skin modes in non-Hermitian elastic phononic beams

Jin, Y., Cai, R., Zhong, W., Rabczuk, T., Zhuang, X., Pennec, Y. & Djafari-Rouhani, B., 2023, META 2023 Paris - France: The 13th International Conference on Metamaterials, Photonic Crystals and Plasmonics. p. 530-531 2 p. (META proceedings).

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

Original language	English
Title of host publication	META 2023 Paris - France
Subtitle of host publication	The 13th International Conference on Metamaterials, Photonic Crystals and Plasmonics
Pages	530-531
Number of pages	2
Publication status	Published - 2023
Event	13th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2023 - Paris, France Duration: 18 Jul 2023 → 21 Jul 2023

Publication series

Name	META proceedings
ISSN (electronic)	2429-1390

Conference

Conference	13th International Conference on Metamaterials, Photonic Crystals and Plasmonics, META 2023
Country/Territory	France
City	Paris
Period	18 Jul 2023 → 21 Jul 2023

Enrichment of three-dimensional numerical manifold method with cover-based contact theory for static and dynamic mechanical response analysis

Kang, G., Ni, K. S., Zhuang, X., Rabczuk, T., Ning, Y. J. & Chen, P. W., Oct 2023, In: Applied mathematical modelling. 122, p. 524-554 31 p.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Pages (from-to)	524-554
Number of pages	31
Journal	Applied mathematical modelling
Volume	122
Early online date	27 May 2023
DOIs	https://doi.org/10.1016/j.apm.2023.05.021
Publication status	Published - Oct 2023

Hong-Ou-Mandel Effect between a Thermal Field and a Heralded Single-photon State: Improved visibility by Multiphoton Components

Kashi, A. K., Caspani, L. & Kues, M., 2023, 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference: CLEO/Europe-EQEC . Institute of Electrical and Electronics Engineers Inc., 1 p.

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

Original language	English
Title of host publication	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
Subtitle of host publication	CLEO/Europe-EQEC
Publisher	Institute of Electrical and Electronics Engineers Inc.
Number of pages	1
ISBN (electronic)	9798350345995
ISBN (print)	979-8-3503-4600-8
DOIs	https://doi.org/10.1109/CLEO/EUROPE-EQEC57999.2023.10231575
Publication status	Published - 2023
Event	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023 - Munich, Germany Duration: 26 Jun 2023 → 30 Jun 2023

Conference

Conference	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
Country/Territory	Germany
City	Munich
Period	26 Jun 2023 → 30 Jun 2023

Spectral Hong-Ou-Mandel Effect between a Heralded Single-Photon State and a Thermal Field: Multiphoton Contamination and the Nonclassicality Threshold

Khodadad Kashi, A., Caspani, L. & Kues, M., 4 Dec 2023, In: Physical review letters. 131, 23, 6 p., 233601.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Article number	233601
Number of pages	6
Journal	Physical review letters
Volume	131
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.131.233601
Publication status	Published - 4 Dec 2023

Radial Basis Function Based Finite Element Method for Bending, Vibration and Buckling Analysis of Laminated Composite Mindlin-Reissner Plates

Kien, D. N., Chen, X., Zhuang, X. & Rabczuk, T., 2023, Advances in Engineering Research and Application: Proceedings of the International Conference on Engineering Research and Applications, ICERA 2022. Nguyen, D. C., Vu, N. P., Long, B. T., Puta, H. & Sattler, K.-U. (eds.). Cham: Springer Science and Business Media Deutschland GmbH, p. 806-822 17 p. (Lecture Notes in Networks and Systems; vol. 602 LNNS).

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

Original language	English
Title of host publication	Advances in Engineering Research and Application
Subtitle of host publication	Proceedings of the International Conference on Engineering Research and Applications, ICERA 2022
Editors	Duy Cuong Nguyen, Ngoc Pi Vu, Banh Tien Long, Horst Puta, Kai-Uwe Sattler
Place of Publication	Cham
Publisher	Springer Science and Business Media Deutschland GmbH
Pages	806-822
Number of pages	17
ISBN (electronic)	978-3-031-22200-9
ISBN (print)	9783031221996
DOIs	https://doi.org/10.1007/978-3-031-22200-9_85
Publication status	Published - 2023
Event	5th International Conference on Engineering Research and Applications, ICERA 2022 - Thai Nguyen, Viet Nam Duration: 1 Dec 2022 → 2 Dec 2022

Publication series

Name	Lecture Notes in Networks and Systems
Volume	602 LNNS
ISSN (Print)	2367-3370
ISSN (electronic)	2367-3389

Conference

Conference	5th International Conference on Engineering Research and Applications, ICERA 2022
Country/Territory	Viet Nam
City	Thai Nguyen
Period	1 Dec 2022 → 2 Dec 2022

Radial basis function based finite element method: Formulation and applications

KIEN, D. N. & ZHUANG, X., Jul 2023, In: Engineering Analysis with Boundary Elements. 152, p. 455-472 18 p.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Pages (from-to)	455-472
Number of pages	18
Journal	Engineering Analysis with Boundary Elements
Volume	152
Early online date	27 Apr 2023
DOIs	https://doi.org/10.1016/j.enganabound.2023.04.014
Publication status	Published - Jul 2023

Topology optimization of microstructures with perturbation analysis and penalty methods

Li, B., Zhuang, X., Fu, X. & Rabczuk, T., Aug 2023, In: Structural and Multidisciplinary Optimization. 66, 8, 178.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Article number	178
Journal	Structural and Multidisciplinary Optimization
Volume	66
Issue number	8
Early online date	18 Jul 2023
DOIs	https://doi.org/10.1007/s00158-023-03612-x
Publication status	Published - Aug 2023

Weak form of bond-associated peridynamic differential operator for solving differential equations

Li, Z., Huang, D., Ren, H. & Rabczuk, T., Oct 2023, In: Engineering with computers. 39, 5, p. 3491-3507 17 p.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Pages (from-to)	3491-3507
Number of pages	17
Journal	Engineering with computers
Volume	39
Issue number	5
Early online date	7 Dec 2022
DOIs	https://doi.org/10.1007/s00366-022-01763-x
Publication status	Published - Oct 2023

Weak form of bond-associated peridynamic differential operator for thermo-mechanical analysis of orthotropic structures

Li, Z., Huang, D., Rabczuk, T. & Ren, H., May 2023, In: European Journal of Mechanics, A/Solids. 99, 104927.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Article number	104927
Journal	European Journal of Mechanics, A/Solids
Volume	99
Early online date	20 Jan 2023
DOIs	https://doi.org/10.1016/j.euromechsol.2023.104927
Publication status	Published - May 2023

Al-DeMat: A web-based expert system platform for computationally expensive models in materials design

Liu, B., Vu-Bac, N., Zhuang, X., Lu, W., Fu, X. & Rabczuk, T., Feb 2023, In: Advances in engineering software. 176, 103398.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Article number	103398
Journal	Advances in engineering software
Volume	176
Early online date	24 Dec 2022
DOIs	https://doi.org/10.1016/j.advengsoft.2022.103398
Publication status	Published - Feb 2023

Fully On-chip Laser-integrated Quantum Source of Entangled Photon States

Mahmudlu, H., Haldar, R., Johanning, R., Kashi, A. K., van Rees, A., Epping, J. P., Boller, K. J. & Kues, M., 2023, 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference: CLEO/Europe-EQEC . Institute of Electrical and Electronics Engineers Inc., 1 p. ( Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference).

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

Original language	English
Title of host publication	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
Subtitle of host publication	CLEO/Europe-EQEC
Publisher	Institute of Electrical and Electronics Engineers Inc.
Number of pages	1
ISBN (electronic)	9798350345995
ISBN (print)	979-8-3503-4600-8
DOIs	https://doi.org/10.1109/CLEO/EUROPE-EQEC57999.2023.10231960
Publication status	Published - 2023
Event	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023 - Munich, Germany Duration: 26 Jun 2023 → 30 Jun 2023

Publication series

Name	Conference on Lasers & Electro-Optics Europe & International Quantum Electronics Conference
ISSN (Print)	2639-5452
ISSN (electronic)	2833-1052

Conference

Conference	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
Country/Territory	Germany
City	Munich
Period	26 Jun 2023 → 30 Jun 2023

Fully on-chip photonic turnkey quantum source for entangled qubit/qudit state generation

Mahmudlu, H., Johanning, R., Kashi, A. K., Rees, A. V., Epping, J. P., Haldar, R., Boller, K.-J. & Kues, M., Jun 2023, In: Nature Photonics. 17, 6, p. 518-524 7 p.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Pages (from-to)	518-524
Number of pages	7
Journal	Nature Photonics
Volume	17
Issue number	6
DOIs	https://doi.org/10.48550/arXiv.2206.08715 https://doi.org/10.1038/s41566-023-01193-1
Publication status	Published - Jun 2023

Soliton compression and supercontinuum spectra in nonlinear diamond photonics

Melchert, O., Kinnewig, S., Dencker, F., Perevoznik, D., Willms, S., Babushkin, I., Wurz, M., Kues, M., Beuchler, S., Wick, T., Morgner, U. & Demircan, A., Jun 2023, In: Diamond and Related Materials. 136, 109939.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Article number	109939
Journal	Diamond and Related Materials
Volume	136
Early online date	25 Apr 2023
DOIs	https://doi.org/10.1016/j.diamond.2023.109939 https://doi.org/10.15488/14126 https://doi.org/10.48550/arXiv.2211.00492
Publication status	Published - Jun 2023

Two-color pulse compounds in waveguides with a zero-nonlinearity point

Melchert, O., Bose, S., Willms, S., Babushkin, I., Morgner, U. & Demircan, A., 15 Jan 2023, In: Optics letters. 48, 2, p. 518-521 4 p.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Pages (from-to)	518-521
Number of pages	4
Journal	Optics letters
Volume	48
Issue number	2
DOIs	https://doi.org/10.48550/arXiv.2211.00530 https://doi.org/10.1364/OL.479662
Publication status	Published - 15 Jan 2023

Two-frequency pulse compounds in presence of a zero-nonlinearity point

Melchert, O., Bose, S., Willms, S., Babushkin, I., Morgner, U. & Demircan, A., 2023, 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference: CLEO/Europe-EQEC . Institute of Electrical and Electronics Engineers Inc., 1 p.

Research output: Chapter in book/report/conference proceeding › Conference abstract › Research › peer review

Original language	English
Title of host publication	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
Subtitle of host publication	CLEO/Europe-EQEC
Publisher	Institute of Electrical and Electronics Engineers Inc.
Number of pages	1
ISBN (electronic)	9798350345995
ISBN (print)	979-8-3503-4600-8
DOIs	https://doi.org/10.1109/CLEO/EUROPE-EQEC57999.2023.10232095
Publication status	Published - 2023
Event	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023 - Munich, Germany Duration: 26 Jun 2023 → 30 Jun 2023

Conference

Conference	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
Country/Territory	Germany
City	Munich
Period	26 Jun 2023 → 30 Jun 2023

Two-frequency pulse compounds in waveguides with single zero-dispersion and zero-nonlinearity points

Melchert, O., Bose, S., Willms, S., Babushkin, I., Morgner, U. & Demircan, A., 2023, 2023 Conference on Lasers and Electro-Optics (CLEO). Institute of Electrical and Electronics Engineers Inc., FTu4B.4. (Quantum Electronics and Laser Science ).

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

Original language	English
Title of host publication	2023 Conference on Lasers and Electro-Optics (CLEO)
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (electronic)	9781957171258
ISBN (print)	978-1-6654-5568-8
Publication status	Published - 2023
Event	2023 Conference on Lasers and Electro-Optics, CLEO 2023 - San Jose, United States Duration: 7 May 2023 → 12 May 2023

Publication series

Name	Quantum Electronics and Laser Science
ISSN (Print)	2160-8989

Conference

Conference	2023 Conference on Lasers and Electro-Optics, CLEO 2023
Country/Territory	United States
City	San Jose
Period	7 May 2023 → 12 May 2023

Scalable Quantum Signal Processing with Integrated Photonics and Fiber-based Modules

Montaut, N., Roztocki, P., Yu, H., Sciara, S., Chemnitz, M., Jestin, Y., Maclellan, B., Fischer, B., Kues, M., Reimer, C., Cortes, L. R., Wetzel, B., Zhang, Y., Loranger, S., Kashyap, R., Cino, A., Chu, S. T., Little, B. E., Moss, D. J., Caspani, L., Munro, W. J., Azaña, J. & Morandotti, R., 2023, 2023 23rd International Conference on Transparent Optical Networks: ICTON. Jaworski, M. & Marciniak, M. (eds.). IEEE Computer Society, (International Conference on Transparent Optical Networks; vol. 2023-July).

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

Original language	English
Title of host publication	2023 23rd International Conference on Transparent Optical Networks
Subtitle of host publication	ICTON
Editors	Marek Jaworski, Marian Marciniak
Publisher	IEEE Computer Society
ISBN (electronic)	9798350303032
ISBN (print)	979-8-3503-0304-9
DOIs	https://doi.org/10.1109/ICTON59386.2023.10207524
Publication status	Published - 2023
Event	23rd International Conference on Transparent Optical Networks, ICTON 2023 - Bucharest, Romania Duration: 2 Jul 2023 → 6 Jul 2023

Publication series

Name	International Conference on Transparent Optical Networks
Volume	2023-July
ISSN (electronic)	2162-7339

Conference

Conference	23rd International Conference on Transparent Optical Networks, ICTON 2023
Country/Territory	Romania
City	Bucharest
Period	2 Jul 2023 → 6 Jul 2023

Anomalous tensile strength and thermal expansion, and low thermal conductivity in wide band gap boron monoxide monolayer

Mortazavi, B., Shojaei, F., Ding, F. & Zhuang, X., Nov 2023, In: FlatChem. 42, 100575.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Article number	100575
Journal	FlatChem
Volume	42
Early online date	30 Oct 2023
DOIs	https://doi.org/10.48550/arXiv.2310.19485 https://doi.org/10.1016/j.flatc.2023.100575
Publication status	Published - Nov 2023

A novel two-dimensional C₃₆ fullerene network; an isotropic, auxetic semiconductor with low thermal conductivity and remarkable stiffness

Mortazavi, B., Shojaei, F. & Zhuang, X., Mar 2023, In: Materials Today Nano. 21, 100280.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Article number	100280
Journal	Materials Today Nano
Volume	21
Early online date	31 Oct 2022
DOIs	https://doi.org/10.1016/j.mtnano.2022.100280
Publication status	Published - Mar 2023

Atomistic modeling of the mechanical properties: the rise of machine learning interatomic potentials

Mortazavi, B., Zhuang, X., Rabczuk, T. & Shapeev, A. V., 4 Apr 2023, In: Materials Horizons. 10, 6, p. 1956-1968 13 p.

Research output: Contribution to journal › Review article › Research › peer review

Original language	English
Pages (from-to)	1956-1968
Number of pages	13
Journal	Materials Horizons
Volume	10
Issue number	6
DOIs	https://doi.org/10.1039/d3mh00125c
Publication status	Published - 4 Apr 2023

Vibration Analysis of a Unimorph Nanobeam with a Dielectric Layer of Both Flexoelectricity and Piezoelectricity

Naderi, A., Quoc-Thai, T., Zhuang, X. & Jiang, X., 30 Apr 2023, In: MATERIALS. 16, 9, 3485.

Research output: Contribution to journal › Article › Research › peer review

Original language	English
Article number	3485
Journal	MATERIALS
Volume	16
Issue number	9
DOIs	https://doi.org/10.3390/ma16093485
Publication status	Published - 30 Apr 2023

Inverse design of integrated phase-tunable beam couplers

Nanda, A., Kues, M. & Calà Lesina, A., 2023, 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference: CLEO/Europe-EQEC . Institute of Electrical and Electronics Engineers Inc., 1 p.

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

Original language	English
Title of host publication	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
Subtitle of host publication	CLEO/Europe-EQEC
Publisher	Institute of Electrical and Electronics Engineers Inc.
Number of pages	1
ISBN (electronic)	9798350345995
ISBN (print)	979-8-3503-4600-8
DOIs	https://doi.org/10.1109/CLEO/EUROPE-EQEC57999.2023.10232039
Publication status	Published - 2023
Event	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023 - Munich, Germany Duration: 26 Jun 2023 → 30 Jun 2023

Conference

Conference	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
Country/Territory	Germany
City	Munich
Period	26 Jun 2023 → 30 Jun 2023

Data-driven computing for computational homogenization and the energy approach-based physics-informed neural networks

Nguyen, T. V. M., 2023, Hannover: Institut für Photonik, Leibniz Universität Hannover.

Research output: Thesis › Doctoral thesis

Original language	English
Qualification	Doctor rerum naturalium
Awarding Institution	Leibniz University Hannover
Supervised by	Zhuang, Xiaoying, Supervisor
Place of Publication	Hannover
Publisher	Institut für Photonik, Leibniz Universität Hannover
Print ISBNs	9783949403446
Publication status	Published - 2023

Editorial: Computational modeling based on nonlocal theory

Rabczuk, T., Zhuang, X. & Oterkus, E., Feb 2023, In: Engineering with computers. 39, 1, p. 3 1 p.

Research output: Contribution to journal › Editorial in journal › Research › peer review

Original language	English
Pages (from-to)	3
Number of pages	1
Journal	Engineering with computers
Volume	39
Issue number	1
Early online date	25 Feb 2023
DOIs	https://doi.org/10.1007/s00366-022-01775-7
Publication status	Published - Feb 2023

Generative Adversarial Learning boosted by a Photonic Quantum Frequency Coprocessor

Rübeling, P., Baekkegaard, T., Zinner, N. T. & Kues, M., 2023, 2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023. Institute of Electrical and Electronics Engineers Inc., ( Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC).

Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review

Original language	English
Title of host publication	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (electronic)	9798350345995
ISBN (print)	979-8-3503-4600-8
DOIs	https://doi.org/10.1109/CLEO/EUROPE-EQEC57999.2023.10231993
Publication status	Published - 2023
Event	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023 - Munich, Germany Duration: 26 Jun 2023 → 30 Jun 2023

Publication series

Name	Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC
ISSN (Print)	2639-5452
ISSN (electronic)	2833-1052

Conference

Conference	2023 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2023
Country/Territory	Germany
City	Munich
Period	26 Jun 2023 → 30 Jun 2023

Publications of CSST

Exceptional points and skin modes in non-Hermitian elastic phononic beams

Publication series

Conference

Enrichment of three-dimensional numerical manifold method with cover-based contact theory for static and dynamic mechanical response analysis

Hong-Ou-Mandel Effect between a Thermal Field and a Heralded Single-photon State: Improved visibility by Multiphoton Components

Conference

Spectral Hong-Ou-Mandel Effect between a Heralded Single-Photon State and a Thermal Field: Multiphoton Contamination and the Nonclassicality Threshold

Radial Basis Function Based Finite Element Method for Bending, Vibration and Buckling Analysis of Laminated Composite Mindlin-Reissner Plates

Publication series

Conference

Radial basis function based finite element method: Formulation and applications

Topology optimization of microstructures with perturbation analysis and penalty methods

Weak form of bond-associated peridynamic differential operator for solving differential equations

Weak form of bond-associated peridynamic differential operator for thermo-mechanical analysis of orthotropic structures

Al-DeMat: A web-based expert system platform for computationally expensive models in materials design

Fully On-chip Laser-integrated Quantum Source of Entangled Photon States

Publication series

Conference

Fully on-chip photonic turnkey quantum source for entangled qubit/qudit state generation

Soliton compression and supercontinuum spectra in nonlinear diamond photonics

Two-color pulse compounds in waveguides with a zero-nonlinearity point

Two-frequency pulse compounds in presence of a zero-nonlinearity point

Conference

Two-frequency pulse compounds in waveguides with single zero-dispersion and zero-nonlinearity points

Publication series

Conference

Scalable Quantum Signal Processing with Integrated Photonics and Fiber-based Modules

Publication series

Conference

Anomalous tensile strength and thermal expansion, and low thermal conductivity in wide band gap boron monoxide monolayer

A novel two-dimensional C36 fullerene network; an isotropic, auxetic semiconductor with low thermal conductivity and remarkable stiffness

Atomistic modeling of the mechanical properties: the rise of machine learning interatomic potentials

Vibration Analysis of a Unimorph Nanobeam with a Dielectric Layer of Both Flexoelectricity and Piezoelectricity

Inverse design of integrated phase-tunable beam couplers

Conference

Data-driven computing for computational homogenization and the energy approach-based physics-informed neural networks

Editorial: Computational modeling based on nonlocal theory

Generative Adversarial Learning boosted by a Photonic Quantum Frequency Coprocessor

Publication series

Conference

Funding

A novel two-dimensional C₃₆ fullerene network; an isotropic, auxetic semiconductor with low thermal conductivity and remarkable stiffness