skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

This content will become publicly available on April 30, 2020

Title: Unravelling the mechanism of the semiconducting-like behavior and its relation to superconductivity in (CaFe 1-xPt xAs) 10Pt 3As 8

Abstract

The temperature-dependence of the in-plane optical properties of (CaFe 1–xPt xAs) 10Pt 3As 8 have been investigated for the undoped (x= 0) parent compound, and the optimally-doped (x = 0.1)superconducting material ( T c ≃12 K) over a wide frequency range. The optical conductivity has been described using two free-carrier (Drude) components, in combination with oscillators to describe interband transitions. At room temperature, the parent compound may be described by a strong, broad Drude term, as well as a narrow, weaker Drude component. Below the structural and magnetic transitions at ≃ 96 and 83 K, respectively, strength is transferred from the free-carrier components into a bound excitation at ≃1000 cm –1, and the material exhibits semiconducting-like behavior. In the optimally-doped sample, at room temperature the optical properties are again described by narrow and broad Drude responses comparable to the parent compound; however, below T* ≃100 K, strength from the narrow Drude is transferred into a newly-emergent low-energy peak at 120 cm –1, which arises from a localization process, resulting in semiconducting-like behavior. Interestingly, below T c, this peak also contributes to the superfluid weight, indicating that some localized electrons condense into Cooper pairs; this observation may provide insight into themore » pairing mechanism in iron-based superconductors.« less

Authors:
 [1]; ORCiD logo [2];  [3];  [4];  [4];  [4];  [5];  [6];  [7];  [5];  [5]
  1. Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Chemistry; Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Nanjing Univ., Nanjing (China)
  4. Chinese Academy of Sciences (CAS), Beijing (China)
  5. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  6. Brookhaven National Lab. (BNL), Upton, NY (United States); Sungkyunkwan Univ., Gyeonggi-do (Korea)
  7. Center for High Pressure Science and Technology Advanced Research, Beijing (China)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1506637
Alternate Identifier(s):
OSTI ID: 1508430
Report Number(s):
BNL-211524-2019-JAAM
Journal ID: ISSN 2469--9950
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review B
Additional Journal Information:
Journal Volume: 99; Journal Issue: 14; Journal ID: ISSN 2469--9950
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

Citation Formats

Yang, Run, Homes, Christopher C., Dai, Yaomin, Yu, Jia, Sui, Qiangtao, Cai, Yongqing, Ren, Zhian, Hwang, Jungseek, Xiao, Hong, Zhou, Xingjiang, and Qiu, Xianggang. Unravelling the mechanism of the semiconducting-like behavior and its relation to superconductivity in (CaFe1-xPtxAs)10Pt3As8. United States: N. p., 2019. Web. doi:10.1103/PhysRevB.99.144520.
Yang, Run, Homes, Christopher C., Dai, Yaomin, Yu, Jia, Sui, Qiangtao, Cai, Yongqing, Ren, Zhian, Hwang, Jungseek, Xiao, Hong, Zhou, Xingjiang, & Qiu, Xianggang. Unravelling the mechanism of the semiconducting-like behavior and its relation to superconductivity in (CaFe1-xPtxAs)10Pt3As8. United States. doi:10.1103/PhysRevB.99.144520.
Yang, Run, Homes, Christopher C., Dai, Yaomin, Yu, Jia, Sui, Qiangtao, Cai, Yongqing, Ren, Zhian, Hwang, Jungseek, Xiao, Hong, Zhou, Xingjiang, and Qiu, Xianggang. Tue . "Unravelling the mechanism of the semiconducting-like behavior and its relation to superconductivity in (CaFe1-xPtxAs)10Pt3As8". United States. doi:10.1103/PhysRevB.99.144520.
@article{osti_1506637,
title = {Unravelling the mechanism of the semiconducting-like behavior and its relation to superconductivity in (CaFe1-xPtxAs)10Pt3As8},
author = {Yang, Run and Homes, Christopher C. and Dai, Yaomin and Yu, Jia and Sui, Qiangtao and Cai, Yongqing and Ren, Zhian and Hwang, Jungseek and Xiao, Hong and Zhou, Xingjiang and Qiu, Xianggang},
abstractNote = {The temperature-dependence of the in-plane optical properties of (CaFe1–xPtxAs)10Pt3As8 have been investigated for the undoped (x= 0) parent compound, and the optimally-doped (x = 0.1)superconducting material (Tc ≃12 K) over a wide frequency range. The optical conductivity has been described using two free-carrier (Drude) components, in combination with oscillators to describe interband transitions. At room temperature, the parent compound may be described by a strong, broad Drude term, as well as a narrow, weaker Drude component. Below the structural and magnetic transitions at ≃ 96 and 83 K, respectively, strength is transferred from the free-carrier components into a bound excitation at ≃1000 cm–1, and the material exhibits semiconducting-like behavior. In the optimally-doped sample, at room temperature the optical properties are again described by narrow and broad Drude responses comparable to the parent compound; however, below T* ≃100 K, strength from the narrow Drude is transferred into a newly-emergent low-energy peak at 120 cm–1, which arises from a localization process, resulting in semiconducting-like behavior. Interestingly, below Tc, this peak also contributes to the superfluid weight, indicating that some localized electrons condense into Cooper pairs; this observation may provide insight into the pairing mechanism in iron-based superconductors.},
doi = {10.1103/PhysRevB.99.144520},
journal = {Physical Review B},
number = 14,
volume = 99,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 30, 2020
Publisher's Version of Record

Save / Share: