journal article·2023-08-22

Selective Electron–Phonon Coupling in Dimerized 1T-TaS2 Revealed by Resonance Raman Spectroscopy

Sergio L. L. M. Ramos, Bruno R. Carvalho, Raphael Longuinhos Monteiro Lobato, Jenaina Ribeiro-Soares, Cristiano Fantini, Henrique B. Ribeiro, Laurent Molino, Ryan Plumadore, Tony Heinz, Adina Luican-Mayer, Marcos A. Pimenta

ACS Nano· Volume 17· Issue 16
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Abstract

The layered transition-metal dichalcogenide material 1T-TaS 2 possesses successive phase transitions upon cooling, resulting in strong electron–electron correlation effects and the formation of charge density waves (CDWs). Recently, a dimerized double-layer stacking configuration was shown to form a Peierls-like instability in the electronic structure. To date, no direct evidence for this double-layer stacking configuration using optical techniques has been reported, in particular through Raman spectroscopy. Here, we employ a multiple excitation and polarized Raman spectroscopy to resolve the behavior of phonons and electron–phonon interactions in the commensurate CDW lattice phase of dimerized 1T-TaS 2 . We observe a distinct behavior from what is predicted for a single layer and probe a richer number of phonon modes that are compatible with the formation of double-layer units (layer dimerization). The multiple-excitation results show a selective coupling of each Raman-active phonon with specific electronic transitions hidden in the optical spectra of 1T-TaS 2, suggesting that selectivity in the electron–phonon coupling must also play a role in the CDW order of 1T-TaS 2 .
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Research context

OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · Organic and Molecular Conductors Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Centro de Tecnologia em Nanomateriais e Grafeno (CTNano), Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 30123-970, Brazil

Departamento de Física, Universidade Federal do Rio Grande do Norte, Natal, Rio Grande do Norte 59078-970, Brazil

Departamento de Física, Universidade Federal de Lavras, Campus Universitário, PO Box 3037, Lavras, Minas Gerais 37200-000, Brazil

Departamento de Física, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 30123-970, Brazil

Department of Applied Physics, Stanford University, Stanford, California 94305, United States

Department of Physics, University of Ottawa, Ottawa, Ontario K1N6N5, Canada

Funding

Funda??o de Amparo ? Pesquisa do Estado de Minas Gerais · Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico · Instituto de Ci?ncia e Tecnologia de Nanomateriais de Carbono · Natural Sciences and Engineering Research Council of Canada · Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior

References (48)

Show source-provided references
1. Peierls R. E. · 1955
2. 10.1103/PhysRevLett.32.88210.1103/PhysRevLett.32.882 ↗
3. 10.1103/PhysRevLett.35.12010.1103/PhysRevLett.35.120 ↗
4. 10.1038/srep0730210.1038/srep07302 ↗
5. 10.1038/nnano.2014.32310.1038/nnano.2014.323 ↗
6. 10.1021/nl504662b10.1021/nl504662b ↗
7. 10.1126/science.124159110.1126/science.1241591 ↗
8. 10.1038/nmat231810.1038/nmat2318 ↗
9. 10.1103/PhysRevB.87.12513510.1103/PhysRevB.87.125135 ↗
10. 10.1038/nphys326710.1038/nphys3267 ↗
11. 10.1103/PhysRevLett.122.10640410.1103/PhysRevLett.122.106404 ↗
12. 10.1016/0038-1098(76)91073-510.1016/0038-1098(76)91073-5 ↗
13. 10.1103/PhysRevB.56.1375710.1103/PhysRevB.56.13757 ↗
14. 10.1016/0378-4363(81)90284-910.1016/0378-4363(81)90284-9 ↗
15. 10.1016/0038-1098(81)90847-410.1016/0038-1098(81)90847-4 ↗
16. 10.1016/S0038-1098(00)00468-310.1016/S0038-1098(00)00468-3 ↗
17. 10.1103/PhysRevB.66.09430110.1103/PhysRevB.66.094301 ↗
18. 10.1103/PhysRevB.93.21410910.1103/PhysRevB.93.214109 ↗
19. 10.1103/PhysRevB.100.16541410.1103/PhysRevB.100.165414 ↗
20. 10.1103/PhysRevB.103.24513310.1103/PhysRevB.103.245133 ↗
21. 10.1103/PhysRevB.44.204610.1103/PhysRevB.44.2046 ↗
22. 10.1103/PhysRevB.100.15540710.1103/PhysRevB.100.155407 ↗
23. 10.1103/PhysRevB.102.16530710.1103/PhysRevB.102.165307 ↗
24. 10.1039/D1CP03626B10.1039/D1CP03626B ↗
25. 10.1088/2053-1583/abce0710.1088/2053-1583/abce07 ↗
26. 10.1103/PhysRevB.1.63810.1103/PhysRevB.1.638 ↗
27. 10.1103/PhysRevB.28.192810.1103/PhysRevB.28.1928 ↗
28. 10.1103/PhysRevLett.114.13640310.1103/PhysRevLett.114.136403 ↗
29. 10.1002/adom.20220036210.1002/adom.202200362 ↗
30. 10.1039/B613962K10.1039/B613962K ↗
31. 10.1038/s41467-020-16132-910.1038/s41467-020-16132-9 ↗
32. 10.1039/C9NR07857F10.1039/C9NR07857F ↗
33. 10.1038/ncomms1095610.1038/ncomms10956 ↗
34. 10.1103/PhysRevLett.73.210310.1103/PhysRevLett.73.2103 ↗
35. 10.1038/s41467-017-00438-210.1038/s41467-017-00438-2 ↗
36. 10.1103/PhysRev.136.B86410.1103/PhysRev.136.B864 ↗
37. 10.1103/PhysRev.140.A113310.1103/PhysRev.140.A1133 ↗
38. 10.1103/RevModPhys.73.51510.1103/RevModPhys.73.515 ↗
39. 10.1088/0953-8984/21/39/39550210.1088/0953-8984/21/39/395502 ↗
40. 10.1088/1361-648X/aa8f7910.1088/1361-648X/aa8f79 ↗
41. 10.1103/PhysRevB.45.1324410.1103/PhysRevB.45.13244 ↗
42. 10.1016/j.cpc.2018.01.01210.1016/j.cpc.2018.01.012 ↗
43. 10.1103/PhysRevB.88.08511710.1103/PhysRevB.88.085117 ↗
44. 10.1103/PhysRevB.94.08541510.1103/PhysRevB.94.085415 ↗
45. 10.1103/PhysRevB.96.07544810.1103/PhysRevB.96.075448 ↗
46. 10.1103/PhysRevB.13.518810.1103/PhysRevB.13.5188 ↗
47. 10.1103/PhysRevLett.82.329610.1103/PhysRevLett.82.3296 ↗
48. 10.1103/PhysRevB.11.388510.1103/PhysRevB.11.3885 ↗