Photoemission study of the electronic structure and charge density waves of Na₂Ti₂Sb₂O

Tan, S. Y.; Jiang, J.; Ye, Z. R.; Niu, X. H.; Song, Y.; Zhang, C. L.; Dai, P. C.; Xie, B. P.; Lai, X. C.; Feng, D. L.

doi:10.1038/srep09515

Title: Photoemission study of the electronic structure and charge density waves of Na₂Ti₂Sb₂O

Journal Article · Thu Apr 30 00:00:00 EDT 2015 · Scientific Reports

DOI:https://doi.org/10.1038/srep09515· OSTI ID:1184847

Tan, S. Y. ^[1]; Jiang, J. ^[2]; Ye, Z. R. ^[3]; Niu, X. H. ^[2]; Song, Y. ^[4]; Zhang, C. L. ^[5]; Dai, P. C. ^[4]; Xie, B. P. ^[2]; Lai, X. C. ^[6]; Feng, D. L. ^[2]

Science and Technology on Surface Physics and Chemistry Lab., Mianyang (China); Fundan Univ., Shanghai (China)
Fundan Univ., Shanghai (China); Nanjing Univ., Nanjing (China)
Fundan Univ., Shanghai (China)
Rice Univ., Houston, TX (United States)
Rice Univ., Houston, TX (United States); Univ. of Tennessee, Knoxville, TN (United States)
Science and Technology on Surface Physics and Chemistry Lab., Mianyang (China)

The electronic structure of Na₂Ti₂Sb₂O single crystal is studied by photon energy and polarization dependent angle-resolved photoemission spectroscopy (ARPES). The obtained band structure and Fermi surface agree well with the band structure calculation of Na₂Ti₂Sb₂O in the non-magnetic state, which indicates that there is no magnetic order in Na₂Ti₂Sb₂O and the electronic correlation is weak. Polarization dependent ARPES results suggest the multi-band and multi-orbital nature of Na₂Ti₂Sb₂O. Photon energy dependent ARPES results suggest that the electronic structure of Na₂Ti₂Sb₂O is rather two-dimensional. Moreover, we find a density wave energy gap forms below the transition temperature and reaches 65 meV at 7 K, indicating that Na₂Ti₂Sb₂O is likely a weakly correlated CDW material in the strong electron-phonon interaction regime. (author)

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Research Organization:: Univ. of Tennessee, Knoxville, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: FG02-05ER46202

OSTI ID:: 1184847

Journal Information:: Scientific Reports, Vol. 5, Issue C; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 12 works

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