Multiple topological states in iron-based superconductors
Abstract
Topological materials and unconventional iron-based superconductors are both important areas of study but, to date, relatively little overlap has been identified between these two fields. However, the combination of topological bands and superconductivity promises the manifestation of exotic superconducting states, including Majorana fermions, the central component of topological quantum computation. Here, using laser-based, spin-resolved and angle-resolved photoemission spectroscopy and density functional theory calculations, we have identified both topological insulator and Dirac semimetal states near the Fermi energy in different iron-based superconducting compounds. Carrier doping can tune these topologically non-trivial bands to the Fermi energy, potentially allowing access to several different superconducting topological states in the same material. Furthermore, these results reveal the generic coexistence of superconductivity and multiple topological states in iron-based superconductors, indicating that this broad class of materials is a promising platform for high-temperature topological superconductivity.
- Authors:
-
[1];
[2];
[1];
[7];
more »
- Univ. of Tokyo, Kashiwa (Japan)
- Princeton Univ., Princeton, NJ (United States)
- Julius-Maximilians-Univ. Wurzburg, Wurzburg (Germany)
- Chinese Academy of Sciences (CAS), Beijing (China)
- Univ. of Tokyo, Kashiwa (Japan); Univ. of Tokyo, Tokyo (Japan)
- Chinese Academy of Sciences (CAS), Beijing (China); Univ. of Chinese Academy of Sciences, Beijing (China)
- Hiroshima Univ., Higashi-Hiroshima (Japan)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. of Tokyo, Tokyo (Japan)
- Kyoto Univ., Kyoto (Japan)
- Publication Date:
- Research Org.:
- Energy Frontier Research Centers (EFRC) (United States). Center for Emergent Superconductivity (CES); Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1494043
- Report Number(s):
- BNL-211249-2019-JAAM
Journal ID: ISSN 1745-2473
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nature Physics
- Additional Journal Information:
- Journal Volume: 15; Journal Issue: 1; Journal ID: ISSN 1745-2473
- Publisher:
- Nature Publishing Group (NPG)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
Citation Formats
Zhang, Peng, Wang, Zhijun, Wu, Xianxin, Yaji, Koichiro, Ishida, Yukiaki, Kohama, Yoshimitsu, Dai, Guangyang, Sun, Yue, Bareille, Cedric, Kuroda, Kenta, Kondo, Takeshi, Okazaki, Kozo, Kindo, Koichi, Wang, Xiancheng, Jin, Changqing, Hu, Jiangping, Thomale, Ronny, Sumida, Kazuki, Wu, Shilong, Miyamoto, Koji, Okuda, Taichi, Ding, Hong, Gu, G. D., Tamegai, Tsuyoshi, Kawakami, Takuto, Sato, Masatoshi, and Shin, Shik. Multiple topological states in iron-based superconductors. United States: N. p., 2018.
Web. doi:10.1038/s41567-018-0280-z.
Zhang, Peng, Wang, Zhijun, Wu, Xianxin, Yaji, Koichiro, Ishida, Yukiaki, Kohama, Yoshimitsu, Dai, Guangyang, Sun, Yue, Bareille, Cedric, Kuroda, Kenta, Kondo, Takeshi, Okazaki, Kozo, Kindo, Koichi, Wang, Xiancheng, Jin, Changqing, Hu, Jiangping, Thomale, Ronny, Sumida, Kazuki, Wu, Shilong, Miyamoto, Koji, Okuda, Taichi, Ding, Hong, Gu, G. D., Tamegai, Tsuyoshi, Kawakami, Takuto, Sato, Masatoshi, & Shin, Shik. Multiple topological states in iron-based superconductors. United States. https://doi.org/10.1038/s41567-018-0280-z
Zhang, Peng, Wang, Zhijun, Wu, Xianxin, Yaji, Koichiro, Ishida, Yukiaki, Kohama, Yoshimitsu, Dai, Guangyang, Sun, Yue, Bareille, Cedric, Kuroda, Kenta, Kondo, Takeshi, Okazaki, Kozo, Kindo, Koichi, Wang, Xiancheng, Jin, Changqing, Hu, Jiangping, Thomale, Ronny, Sumida, Kazuki, Wu, Shilong, Miyamoto, Koji, Okuda, Taichi, Ding, Hong, Gu, G. D., Tamegai, Tsuyoshi, Kawakami, Takuto, Sato, Masatoshi, and Shin, Shik. Mon .
"Multiple topological states in iron-based superconductors". United States. https://doi.org/10.1038/s41567-018-0280-z. https://www.osti.gov/servlets/purl/1494043.
@article{osti_1494043,
title = {Multiple topological states in iron-based superconductors},
author = {Zhang, Peng and Wang, Zhijun and Wu, Xianxin and Yaji, Koichiro and Ishida, Yukiaki and Kohama, Yoshimitsu and Dai, Guangyang and Sun, Yue and Bareille, Cedric and Kuroda, Kenta and Kondo, Takeshi and Okazaki, Kozo and Kindo, Koichi and Wang, Xiancheng and Jin, Changqing and Hu, Jiangping and Thomale, Ronny and Sumida, Kazuki and Wu, Shilong and Miyamoto, Koji and Okuda, Taichi and Ding, Hong and Gu, G. D. and Tamegai, Tsuyoshi and Kawakami, Takuto and Sato, Masatoshi and Shin, Shik},
abstractNote = {Topological materials and unconventional iron-based superconductors are both important areas of study but, to date, relatively little overlap has been identified between these two fields. However, the combination of topological bands and superconductivity promises the manifestation of exotic superconducting states, including Majorana fermions, the central component of topological quantum computation. Here, using laser-based, spin-resolved and angle-resolved photoemission spectroscopy and density functional theory calculations, we have identified both topological insulator and Dirac semimetal states near the Fermi energy in different iron-based superconducting compounds. Carrier doping can tune these topologically non-trivial bands to the Fermi energy, potentially allowing access to several different superconducting topological states in the same material. Furthermore, these results reveal the generic coexistence of superconductivity and multiple topological states in iron-based superconductors, indicating that this broad class of materials is a promising platform for high-temperature topological superconductivity.},
doi = {10.1038/s41567-018-0280-z},
journal = {Nature Physics},
number = 1,
volume = 15,
place = {United States},
year = {Mon Sep 24 00:00:00 EDT 2018},
month = {Mon Sep 24 00:00:00 EDT 2018}
}
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Figures / Tables:
FIG. 1: Different topological phases and band structures of iron-based superconductors. (a - c) The out-of-plane dispersion and the corresponding (001) surface spectrum, for NI (a), TI (b) and TDS (c). We overlapped the spin-polarized surface spectrum (blue and red) on top of the spin-integrated surface spectrum (grey). (d -more »
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