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Title: Electronic structure study of LaCoIn 5 and its comparison with CeCoIn 5

Abstract

A central key to understanding heavy-fermion systems involves revealing how itinerant low-energy excitations emerge from local f moments. An effective way to understand the f-electron behavior is to compare the electronic structure of f-electron compounds with a reference isostructural compound with no f electrons. Here we present a systematic electronic structure study of LaCoIn5, which is a non-f reference compound of the heavy-fermion superconductor CeCoIn5. Our angle-resolved photoemission spectroscopy study of the three-dimensional Fermi surface and band structure of LaCoIn5 highlights the rather three-dimensional electronic character of this compound. The conduction bands of LaCoIn5 are almost identical to that of CeCoIn5, though obvious differences can be found in the low-energy electronic structure. Finally, we give a quantitative analysis of the Fermi pocket change in LaCoIn5 and CeCoIn5, which may be helpful for understanding the important “large” and “small” Fermi surface issue in heavy-fermion compounds.

Authors:
ORCiD logo [1];  [1];  [2];  [2];  [3];  [3];  [4];  [4];  [4];  [5];  [3]
  1. Science and Technology on Surface Physics and Chemistry Lab, Mianyang (China)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Yale Univ., New Haven, CT (United States)
  4. Fudan Univ., Shanghai (China)
  5. Shanghai Inst. of Applied Physics, Shanghai (China)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1562480
Alternate Identifier(s):
OSTI ID: 1546371
Report Number(s):
BNL-212092-2019-JAAM
Journal ID: ISSN 2469-9950; PRBMDO; TRN: US2000719
Grant/Contract Number:  
SC0012704; SC0019211; AC02-98CH10886
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 100; Journal Issue: 3; Journal ID: ISSN 2469-9950
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Chen, Q. Y., Luo, X. B., Vescovo, Elio, Kaznatcheev, K., Walker, F. J., Ahn, C. H., Ding, Z. F., Zhu, Z. H., Shu, L., Huang, Y. B., and Jiang, J. Electronic structure study of LaCoIn5 and its comparison with CeCoIn5. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.100.035117.
Chen, Q. Y., Luo, X. B., Vescovo, Elio, Kaznatcheev, K., Walker, F. J., Ahn, C. H., Ding, Z. F., Zhu, Z. H., Shu, L., Huang, Y. B., & Jiang, J. Electronic structure study of LaCoIn5 and its comparison with CeCoIn5. United States. doi:10.1103/PhysRevB.100.035117.
Chen, Q. Y., Luo, X. B., Vescovo, Elio, Kaznatcheev, K., Walker, F. J., Ahn, C. H., Ding, Z. F., Zhu, Z. H., Shu, L., Huang, Y. B., and Jiang, J. Wed . "Electronic structure study of LaCoIn5 and its comparison with CeCoIn5". United States. doi:10.1103/PhysRevB.100.035117. https://www.osti.gov/servlets/purl/1562480.
@article{osti_1562480,
title = {Electronic structure study of LaCoIn5 and its comparison with CeCoIn5},
author = {Chen, Q. Y. and Luo, X. B. and Vescovo, Elio and Kaznatcheev, K. and Walker, F. J. and Ahn, C. H. and Ding, Z. F. and Zhu, Z. H. and Shu, L. and Huang, Y. B. and Jiang, J.},
abstractNote = {A central key to understanding heavy-fermion systems involves revealing how itinerant low-energy excitations emerge from local f moments. An effective way to understand the f-electron behavior is to compare the electronic structure of f-electron compounds with a reference isostructural compound with no f electrons. Here we present a systematic electronic structure study of LaCoIn5, which is a non-f reference compound of the heavy-fermion superconductor CeCoIn5. Our angle-resolved photoemission spectroscopy study of the three-dimensional Fermi surface and band structure of LaCoIn5 highlights the rather three-dimensional electronic character of this compound. The conduction bands of LaCoIn5 are almost identical to that of CeCoIn5, though obvious differences can be found in the low-energy electronic structure. Finally, we give a quantitative analysis of the Fermi pocket change in LaCoIn5 and CeCoIn5, which may be helpful for understanding the important “large” and “small” Fermi surface issue in heavy-fermion compounds.},
doi = {10.1103/PhysRevB.100.035117},
journal = {Physical Review B},
number = 3,
volume = 100,
place = {United States},
year = {2019},
month = {7}
}

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