Low-energy excitations in type-II Weyl semimetal T d - MoTe 2 evidenced through optical conductivity

Santos-Cottin, D.; Martino, E.; Le Mardelé, F.; Witteveen, C.; von Rohr, F. O.; Homes, Christopher C.; Rukelj, Z.; Akrap, Ana

doi:10.1103/physrevmaterials.4.021201

Title: Low-energy excitations in type-II Weyl semimetal $T_{d} - {MoTe}_{2}$ evidenced through optical conductivity

Journal Article · Mon Feb 10 00:00:00 EST 2020 · Physical Review Materials

DOI:https://doi.org/10.1103/physrevmaterials.4.021201· OSTI ID:1593248

Santos-Cottin, D. ^[1]; Martino, E. ^[2]; Le Mardelé, F. ^[1]; Witteveen, C. ^[3]; von Rohr, F. O. ^[3];

^[4]; Rukelj, Z. ^[5];

^[1]

Univ. of Fribourg, Fribourg (Switzerland)
Univ. of Fribourg, Fribourg (Switzerland); Ecole Polytechnique Federale Lausanne (Switzlerland). Institute of Physics – IPHYS
Univ. of Zurich (Switzerland). Physik-Inst. der Universitat Zürich
Brookhaven National Lab. (BNL), Upton, NY (United States)
Univ. of Fribourg, Fribourg (Switzerland); Univ. of Zagreb, Zagreb (Croatia)

Molybdenum ditelluride, MoTe₂, is a versatile material where the topological phase can be readily tuned by manipulating the associated structural phase transition. The fine details of the band structure of MoTe₂, key to understanding its topological properties, have proven difficult to disentangle experientially due to the multiband character of the material. Through experimental optical conductivity spectra, we detect two strong low-energy interband transitions. Both are linked to excitations between spin-orbit split bands. The lowest interband transition shows a strong thermal shift, pointing to a chemical potential that dramatically decreases with temperature. Finally, with the help of ab initio calculations and a simple two-band model, we give qualitative and quantitative explanations of the main features in the temperature-dependent optical spectra up to 400 meV.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Swiss National Science Foundation (SNSF); University of Fribourg

Grant/Contract Number:: SC0012704

OSTI ID:: 1593248

Report Number(s):: BNL-213566-2020-JAAM; TRN: US2101065

Journal Information:: Physical Review Materials, Vol. 4, Issue 2; ISSN 2475-9953

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 17 works

Citation information provided by
Web of Science

References (41)

Ground-state properties of lanthanum: Treatment of extended-core states Singh, David Physical Review B, Vol. 43, Issue 8 https://doi.org/10.1103/PhysRevB.43.6388	journal	March 1991
Type-II Weyl semimetals Soluyanov, Alexey A.; Gresch, Dominik; Wang, Zhijun Nature, Vol. 527, Issue 7579 https://doi.org/10.1038/nature15768	journal	November 2015
Valley Zeeman Splitting and Valley Polarization of Neutral and Charged Excitons in Monolayer MoTe ₂ at High Magnetic Fields Arora, Ashish; Schmidt, Robert; Schneider, Robert Nano Letters, Vol. 16, Issue 6 https://doi.org/10.1021/acs.nanolett.6b00748	journal	May 2016
A low-temperature structural phase transition in β-MoTe ₂ Clarke, R.; Marseglia, E.; Hughes, H. P. Philosophical Magazine B, Vol. 38, Issue 2 https://doi.org/10.1080/13642817808245670	journal	August 1978
Temperature-driven topological transition in 1T'-MoTe2 Berger, Ayelet Notis; Andrade, Erick; Kerelsky, Alexander npj Quantum Materials, Vol. 3, Issue 1 https://doi.org/10.1038/s41535-017-0075-y	journal	January 2018
Hall effect within the colossal magnetoresistive semimetallic state of ${MoTe}_{2}$ Zhou, Qiong; Rhodes, D.; Zhang, Q. R. Physical Review B, Vol. 94, Issue 12 https://doi.org/10.1103/PhysRevB.94.121101	journal	September 2016
Observation of spin-polarized bands and domain-dependent Fermi arcs in polar Weyl semimetal $MoT e_{2}$ Sakano, M.; Bahramy, M. S.; Tsuji, H. Physical Review B, Vol. 95, Issue 12 https://doi.org/10.1103/PhysRevB.95.121101	journal	March 2017
Investigation on the phase-transition-induced hysteresis in the thermal transport along the c-axis of MoTe2 Yan, Xue-Jun; Lv, Yang-Yang; Li, Lei npj Quantum Materials, Vol. 2, Issue 1 https://doi.org/10.1038/s41535-017-0031-x	journal	June 2017
Two-Dimensional Conical Dispersion in ${ZrTe}_{5}$ Evidenced by Optical Spectroscopy Martino, E.; Crassee, I.; Eguchi, G. Physical Review Letters, Vol. 122, Issue 21 https://doi.org/10.1103/PhysRevLett.122.217402	journal	May 2019
Quadratic temperature dependence up to 50 K of the resistivity of metallic Zandt, Thorsten; Dwelk, Helmut; Janowitz, Christoph Journal of Alloys and Compounds, Vol. 442, Issue 1-2 https://doi.org/10.1016/j.jallcom.2006.09.157	journal	September 2007
Bandgap opening in few-layered monoclinic MoTe2 Keum, Dong Hoon; Cho, Suyeon; Kim, Jung Ho Nature Physics, Vol. 11, Issue 6 https://doi.org/10.1038/nphys3314	journal	May 2015
Electronic structure and crystallography of MoTe ₂ and WTe ₂ Dawson, W. G.; Bullett, D. W. Journal of Physics C: Solid State Physics, Vol. 20, Issue 36 https://doi.org/10.1088/0022-3719/20/36/017	journal	December 1987
Signatures of the topological s +− superconducting order parameter in the type-II Weyl semimetal T d-MoTe2 Guguchia, Z.; von Rohr, F.; Shermadini, Z. Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/s41467-017-01066-6	journal	October 2017
${MoTe}_{2}$ : A Type-II Weyl Topological Metal Wang, Zhijun; Gresch, Dominik; Soluyanov, Alexey A. Physical Review Letters, Vol. 117, Issue 5 https://doi.org/10.1103/PhysRevLett.117.056805	journal	July 2016
Prediction of an arc-tunable Weyl Fermion metallic state in MoxW1−xTe2 Chang, Tay-Rong; Xu, Su-Yang; Chang, Guoqing Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms10639	journal	February 2016
Ambipolar MoTe ₂ Transistors and Their Applications in Logic Circuits Lin, Yen-Fu; Xu, Yong; Wang, Sheng-Tsung Advanced Materials, Vol. 26, Issue 20 https://doi.org/10.1002/adma.201305845	journal	April 2014
Technique for measuring the reflectance of irregular, submillimeter-sized samples Homes, Christopher C.; Reedyk, M.; Cradles, D. A. Applied Optics, Vol. 32, Issue 16 https://doi.org/10.1364/AO.32.002976	journal	January 1993
The crystal structures of WTe ₂ and high-temperature MoTe ₂ Brown, B. E. Acta Crystallographica, Vol. 20, Issue 2 https://doi.org/10.1107/S0365110X66000513	journal	February 1966
Bulk Fermi surface of the Weyl type-II semimetallic candidate $γ - {MoTe}_{2}$ Rhodes, D.; Schönemann, R.; Aryal, N. Physical Review B, Vol. 96, Issue 16 https://doi.org/10.1103/PhysRevB.96.165134	journal	October 2017
Raman signatures of inversion symmetry breaking and structural phase transition in type-II Weyl semimetal MoTe2 Zhang, Kenan; Bao, Changhua; Gu, Qiangqiang Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms13552	journal	December 2016
Raman scattering in the transition-metal dichalcogenides of $1 T^{'} − MoT e_{2}, T_{d} − MoT e_{2}$ , and $T_{d} − WT e_{2}$ Ma, Xiaoli; Guo, Pengjie; Yi, Changjiang Physical Review B, Vol. 94, Issue 21 https://doi.org/10.1103/PhysRevB.94.214105	journal	December 2016
Prediction of Weyl semimetal in orthorhombic ${MoTe}_{2}$ Sun, Yan; Wu, Shu-Chun; Ali, Mazhar N. Physical Review B, Vol. 92, Issue 16 https://doi.org/10.1103/PhysRevB.92.161107	journal	October 2015
Optical properties of the perfectly compensated semimetal ${WTe}_{2}$ Homes, C. C.; Ali, M. N.; Cava, R. J. Physical Review B, Vol. 92, Issue 16 https://doi.org/10.1103/PhysRevB.92.161109	journal	October 2015
Origins of the structural phase transitions in ${MoTe}_{2}$ and ${WTe}_{2}$ Kim, Hyun-Jung; Kang, Seoung-Hun; Hamada, Ikutaro Physical Review B, Vol. 95, Issue 18 https://doi.org/10.1103/PhysRevB.95.180101	journal	May 2017
Mobility spectrum analytical approach for the type-II Weyl semimetal T _d -MoTe ₂ Pei, Q. L.; Luo, X.; Chen, F. C. Applied Physics Letters, Vol. 112, Issue 7 https://doi.org/10.1063/1.5008850	journal	February 2018
Universal Optical Conductance of Graphite Kuzmenko, A. B.; van Heumen, E.; Carbone, F. Physical Review Letters, Vol. 100, Issue 11 https://doi.org/10.1103/PhysRevLett.100.117401	journal	March 2008
Superconductivity in Weyl semimetal candidate MoTe2 Qi, Yanpeng; Naumov, Pavel G.; Ali, Mazhar N. Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms11038	journal	March 2016
Fermi Arcs and Their Topological Character in the Candidate Type-II Weyl Semimetal ${MoTe}_{2}$ Tamai, A.; Wu, Q. S.; Cucchi, I. Physical Review X, Vol. 6, Issue 3 https://doi.org/10.1103/PhysRevX.6.031021	journal	August 2016
Use of x-ray scattering functions in Kramers-Kronig analysis of reflectance Tanner, D. B. Physical Review B, Vol. 91, Issue 3 https://doi.org/10.1103/PhysRevB.91.035123	journal	January 2015
Electrical resistivity anomaly in β-MoTe ₂ (metallic behaviour) Hughes, H. P.; Friend, R. H. Journal of Physics C: Solid State Physics, Vol. 11, Issue 3 https://doi.org/10.1088/0022-3719/11/3/004	journal	February 1978
Scalable T2 resistivity in a small single-component Fermi surface Lin, X.; Fauque, B.; Behnia, K. Science, Vol. 349, Issue 6251 https://doi.org/10.1126/science.aaa8655	journal	August 2015
Optical evidence of the type-II Weyl semimetals MoTe 2 and WTe 2 Kimura, Shin-ichi; Nakajima, Yuki; Mita, Zenjiro Physical Review B, Vol. 99, Issue 19 https://doi.org/10.1103/PhysRevB.99.195203	journal	May 2019
Ultrahigh sensitive MoTe ₂ phototransistors driven by carrier tunneling Yin, Lei; Zhan, Xueying; Xu, Kai Applied Physics Letters, Vol. 108, Issue 4 https://doi.org/10.1063/1.4941001	journal	January 2016
Field-Effect Transistors Based on Few-Layered α-MoTe ₂ Pradhan, Nihar R.; Rhodes, Daniel; Feng, Simin ACS Nano, Vol. 8, Issue 6 https://doi.org/10.1021/nn501013c	journal	May 2014
Enhanced ultrafast relaxation rate in the Weyl semimetal phase of $MoTe_{2}$ measured by time- and angle-resolved photoelectron spectroscopy Crepaldi, A.; Autès, G.; Gatti, Gianmarco Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2017-13982	text	January 2017
Field-Effect Transistors Based on Few-Layered alpha-MoTe_2 Pradhan, Nihar R.; Rhodes, Daniel; Feng, Simin arXiv https://doi.org/10.48550/arxiv.1406.0178	text	January 2014
Use of X-ray scattering functions in Kramers-Kronig analysis of reflectance Tanner, D. B. arXiv https://doi.org/10.48550/arxiv.1411.2061	text	January 2014
Type-II Weyl Semimetals Soluyanov, Alexey A.; Gresch, Dominik; Wang, Zhijun arXiv https://doi.org/10.48550/arxiv.1507.01603	text	January 2015
Superconductivity in Weyl Semimetal Candidate MoTe2 Qi, Yanpeng; Naumov, Pavel G.; Ali, Mazhar N. arXiv https://doi.org/10.48550/arxiv.1508.03502	text	January 2015
Scalable T^2 resistivity in a small single-component Fermi surface Lin, Xiao; Fauque, Benoit; Behnia, Kamran arXiv https://doi.org/10.48550/arxiv.1508.07812	text	January 2015
Raman signatures of inversion symmetry breaking and structural phase transition in type-II Weyl semimetal MoTe2 Zhang, Kenan; Bao, Changhua; Gu, Qiangqiang arXiv https://doi.org/10.48550/arxiv.1606.05071	text	January 2016

Similar Records

Emergence of topologically protected states in the

{MoTe}_{2}

Weyl semimetal with layer-stacking order

Journal Article · Mon Apr 08 00:00:00 EDT 2019 · Physical Review B · OSTI ID:1593248

Schneeloch, John A.; Duan, Chunruo; Yang, Junjie; +3 more

Optical conductivity of the type-II Weyl semimetal

{TaIrTe}_{4}

Journal Article · Mon Jul 06 00:00:00 EDT 2020 · Physical Review B · OSTI ID:1593248

Le Mardelé, F.; Santos-Cottin, D.; Martino, E.; +7 more

Bulk Fermi surface of the Weyl type-II semimetallic candidate

γ - {MoTe}_{2}

Journal Article · Tue Oct 17 00:00:00 EDT 2017 · Physical Review B · OSTI ID:1593248

Rhodes, D.; Schönemann, R.; Aryal, N.; +15 more

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY

Title: Low-energy excitations in type-II Weyl semimetal T d - MoTe 2 evidenced through optical conductivity

Citation Formats

References (41)

Similar Records

Related Subjects

Title: Low-energy excitations in type-II Weyl semimetal $T_{d} - {MoTe}_{2}$ evidenced through optical conductivity