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

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:
Report Number(s):
BNL-112059-2016-JA
Journal ID: ISSN 2469-9950; R&D Project: PM016; KC0201050
Grant/Contract Number:
SC00112704
Type:
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)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1335425
Alternate Identifier(s):
OSTI ID: 1238085