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Title: Observation of Dirac-like band dispersion in LaAgSb 2

Abstract

In this paper, we present a combined angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations study of the electronic structure of LaAgSb 2 in the entire first Brillouin zone. We observe a Dirac-cone-like structure in the vicinity of the Fermi level formed by the crossing of two linear energy bands, as well as the nested segments of a Fermi surface pocket emerging from the cone. In conclusion, our ARPES results show the close relationship of the Dirac cone to the charge-density-wave ordering, providing consistent explanations for exotic behaviors in this material.

Authors:
 [1];  [2];  [3];  [1];  [4];  [5];  [6];  [7];  [1];  [8];  [3];  [9];  [8]
  1. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS)
  2. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS) ; Collaborative Innovation Center of Quantum Matter, Beijing (China)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). CMPMSD
  4. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source; ETH Zurich (Switzerland). Laboratory for Solid State Physics
  5. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source; Ecole Polytechnique Federale Lausanne (Switzlerland). Institute of Condensed Matter Physics
  6. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source; Ecole Polytechnique Federale Lausanne (Switzlerland). Institute of Condensed Matter Physics; Indian Institute of Technology Delhi, New Delhi (India). Department of Physics
  7. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source; Ecole Polytechnique Federale Lausanne (Switzlerland). Institute of Condensed Matter Physics; Belgrade University, Belgrade (Serbia). Atomic Physics Laboratory, VINCA Institute of Nuclear Sciences
  8. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics. Beijing National Lab. for Condensed Matter Physics (BNLCP-CAS) ; Collaborative Innovation Center of Quantum Matter, Beijing (China)
  9. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1335425
Alternate Identifier(s):
OSTI ID: 1238085
Report Number(s):
BNL-112059-2016-JA
Journal ID: ISSN 2469-9950; R&D Project: PM016; KC0201050
Grant/Contract Number:  
SC00112704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 93; Journal Issue: 8; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Shi, X., Richard, P., Wang, Kefeng, Liu, M., Matt, C. E., Xu, N., Dhaka, R. S., Ristic, Z., Qian, T., Yang, Y. -F., Petrovic, C., Shi, M., and Ding, H. Observation of Dirac-like band dispersion in LaAgSb2. United States: N. p., 2016. Web. doi:10.1103/PhysRevB.93.081105.
Shi, X., Richard, P., Wang, Kefeng, Liu, M., Matt, C. E., Xu, N., Dhaka, R. S., Ristic, Z., Qian, T., Yang, Y. -F., Petrovic, C., Shi, M., & Ding, H. Observation of Dirac-like band dispersion in LaAgSb2. United States. doi:10.1103/PhysRevB.93.081105.
Shi, X., Richard, P., Wang, Kefeng, Liu, M., Matt, C. E., Xu, N., Dhaka, R. S., Ristic, Z., Qian, T., Yang, Y. -F., Petrovic, C., Shi, M., and Ding, H. Tue . "Observation of Dirac-like band dispersion in LaAgSb2". United States. doi:10.1103/PhysRevB.93.081105. https://www.osti.gov/servlets/purl/1335425.
@article{osti_1335425,
title = {Observation of Dirac-like band dispersion in LaAgSb2},
author = {Shi, X. and Richard, P. and Wang, Kefeng and Liu, M. and Matt, C. E. and Xu, N. and Dhaka, R. S. and Ristic, Z. and Qian, T. and Yang, Y. -F. and Petrovic, C. and Shi, M. and Ding, H.},
abstractNote = {In this paper, we present a combined angle-resolved photoemission spectroscopy (ARPES) and first-principles calculations study of the electronic structure of LaAgSb2 in the entire first Brillouin zone. We observe a Dirac-cone-like structure in the vicinity of the Fermi level formed by the crossing of two linear energy bands, as well as the nested segments of a Fermi surface pocket emerging from the cone. In conclusion, our ARPES results show the close relationship of the Dirac cone to the charge-density-wave ordering, providing consistent explanations for exotic behaviors in this material.},
doi = {10.1103/PhysRevB.93.081105},
journal = {Physical Review B},
issn = {2469-9950},
number = 8,
volume = 93,
place = {United States},
year = {2016},
month = {2}
}

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