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Title: Momentum dependent $$d_{xz/yz}$$ band splitting in LaFeAsO

Abstract

The nematic phase in iron based superconductors (IBSs) has attracted attention with a notion that it may provide important clue to the superconductivity. A series of angle-resolved photoemission spectroscopy (ARPES) studies were performed to understand the origin of the nematic phase. However, there is lack of ARPES study on LaFeAsO nematic phase. Here, we report the results of ARPES studies of the nematic phase in LaFeAsO. Degeneracy breaking between the dxz and dyz hole bands near the Γ and M point is observed in the nematic phase. Different temperature dependent band splitting behaviors are observed at the Γ and M points. The energy of the band splitting near the M point decreases as the temperature decreases while it has little temperature dependence near the Γ point. The nematic nature of the band shift near the M point is confirmed through a detwin experiment using a piezo device. Since a momentum dependent splitting behavior has been observed in other iron based superconductors, our observation confirms that the behavior is a universal one among iron based superconductors.

Authors:
 [1];  [1];  [1];  [1];  [2];  [2];  [3];  [4];  [4];  [5];  [5];  [6];  [6];  [7];  [8];  [1]
  1. Inst. for Basic Science (IBS), Seoul (South Korea). Center for Correlated Electron Systems; Seoul National Univ. (SNU) (South Korea)
  2. Leibniz Inst. for Solid State and Materials Research, Dresden (Germany)
  3. Leibniz Inst. for Solid State and Materials Research, Dresden (Germany); Dresden Univ. of Technology (Germany). Inst. of Solid State Physics
  4. Inst. for Basic Science (IBS), Pohang (South Korea). Center for Artificial Low Dimensional Electronic Systems; Pohang Univ. of Science and Technology (South Korea)
  5. Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Lab. for Condensed Matter Physics; Collaborative Innovation Center of Quantum Matter, Beijing (China)
  6. Chinese Academy of Sciences (CAS), Shanghai (China). State Key Lab. of Functional Materials for Informatics, Shanghai Inst. of Microsystem and Information Technology (SIMIT)
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  8. Korea Advanced Inst. of Science and Technology, Daejeon (South Korea)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Research Foundation of Korea (NRF); National Natural Science Foundation of China (NSFC)
OSTI Identifier:
1763674
Grant/Contract Number:  
AC02-05CH11231; XDB07000000; 11227902; 2016K1A4A4A01922028; 2018K1A3A7A09056310
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Materials science; physics

Citation Formats

Huh, S. S., Kim, Y. S., Kyung, W. S., Jung, J. K., Kappenberger, R., Aswartham, S., Büchner, B., Ok, J. M., Kim, J. S., Dong, C., Hu, J. P., Cho, S. H., Shen, D. W., Denlinger, J. D., Kim, Y. K., and Kim, C.. Momentum dependent $d_{xz/yz}$ band splitting in LaFeAsO. United States: N. p., 2020. Web. https://doi.org/10.1038/s41598-020-75600-w.
Huh, S. S., Kim, Y. S., Kyung, W. S., Jung, J. K., Kappenberger, R., Aswartham, S., Büchner, B., Ok, J. M., Kim, J. S., Dong, C., Hu, J. P., Cho, S. H., Shen, D. W., Denlinger, J. D., Kim, Y. K., & Kim, C.. Momentum dependent $d_{xz/yz}$ band splitting in LaFeAsO. United States. https://doi.org/10.1038/s41598-020-75600-w
Huh, S. S., Kim, Y. S., Kyung, W. S., Jung, J. K., Kappenberger, R., Aswartham, S., Büchner, B., Ok, J. M., Kim, J. S., Dong, C., Hu, J. P., Cho, S. H., Shen, D. W., Denlinger, J. D., Kim, Y. K., and Kim, C.. Mon . "Momentum dependent $d_{xz/yz}$ band splitting in LaFeAsO". United States. https://doi.org/10.1038/s41598-020-75600-w. https://www.osti.gov/servlets/purl/1763674.
@article{osti_1763674,
title = {Momentum dependent $d_{xz/yz}$ band splitting in LaFeAsO},
author = {Huh, S. S. and Kim, Y. S. and Kyung, W. S. and Jung, J. K. and Kappenberger, R. and Aswartham, S. and Büchner, B. and Ok, J. M. and Kim, J. S. and Dong, C. and Hu, J. P. and Cho, S. H. and Shen, D. W. and Denlinger, J. D. and Kim, Y. K. and Kim, C.},
abstractNote = {The nematic phase in iron based superconductors (IBSs) has attracted attention with a notion that it may provide important clue to the superconductivity. A series of angle-resolved photoemission spectroscopy (ARPES) studies were performed to understand the origin of the nematic phase. However, there is lack of ARPES study on LaFeAsO nematic phase. Here, we report the results of ARPES studies of the nematic phase in LaFeAsO. Degeneracy breaking between the dxz and dyz hole bands near the Γ and M point is observed in the nematic phase. Different temperature dependent band splitting behaviors are observed at the Γ and M points. The energy of the band splitting near the M point decreases as the temperature decreases while it has little temperature dependence near the Γ point. The nematic nature of the band shift near the M point is confirmed through a detwin experiment using a piezo device. Since a momentum dependent splitting behavior has been observed in other iron based superconductors, our observation confirms that the behavior is a universal one among iron based superconductors.},
doi = {10.1038/s41598-020-75600-w},
journal = {Scientific Reports},
number = 1,
volume = 10,
place = {United States},
year = {2020},
month = {11}
}

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