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

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)
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [5] ;  [4] ;  [2] ;  [6] ;  [2]
  1. Science and Technology on Surface Physics and Chemistry Lab., Mianyang (China); Fundan Univ., Shanghai (China)
  2. Fundan Univ., Shanghai (China); Nanjing Univ., Nanjing (China)
  3. Fundan Univ., Shanghai (China)
  4. Rice Univ., Houston, TX (United States)
  5. Rice Univ., Houston, TX (United States); Univ. of Tennessee, Knoxville, TN (United States)
  6. Science and Technology on Surface Physics and Chemistry Lab., Mianyang (China)
Publication Date:
Grant/Contract Number:
FG02-05ER46202
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal Issue: C; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1184847

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., and Feng, D. L.. Photoemission study of the electronic structure and charge density waves of Na₂Ti₂Sb₂O. United States: N. p., Web. doi:10.1038/srep09515.
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.. Photoemission study of the electronic structure and charge density waves of Na₂Ti₂Sb₂O. United States. doi:10.1038/srep09515.
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., and Feng, D. L.. 2015. "Photoemission study of the electronic structure and charge density waves of Na₂Ti₂Sb₂O". United States. doi:10.1038/srep09515. https://www.osti.gov/servlets/purl/1184847.
@article{osti_1184847,
title = {Photoemission study of the electronic structure and charge density waves of Na₂Ti₂Sb₂O},
author = {Tan, S. Y. and Jiang, J. and Ye, Z. R. and Niu, X. H. and Song, Y. and Zhang, C. L. and Dai, P. C. and Xie, B. P. and Lai, X. C. and Feng, D. L.},
abstractNote = {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)},
doi = {10.1038/srep09515},
journal = {Scientific Reports},
number = C,
volume = 5,
place = {United States},
year = {2015},
month = {4}
}