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Title: Anomalous anisotropic compression behavior of superconducting CrAs under high pressure

Abstract

CrAs was observed to possess the bulk superconductivity under high-pressure conditions. To understand the superconducting mechanism and explore the correlation between the structure and superconductivity, the high-pressure structural evolution of CrAs was investigated using the angle-dispersive X-ray diffraction (XRD) method. The structure of CrAs remains stable up to 1.8 GPa, whereas the lattice parameters exhibit anomalous compression behaviors. With increasing pressure, the lattice parameters a and c both demonstrate a nonmonotonic change, and the lattice parameter b undergoes a rapid contraction at ~0.18–0.35 GPa, which suggests that a pressure-induced isostructural phase transition occurs in CrAs. Above the phase transition pressure, the axial compressibilities of CrAs present remarkable anisotropy. A schematic band model was used to address the anomalous compression behavior of CrAs. Lastly, the present results shed light on the structural and related electronic responses to high pressure, which play a key role toward understanding the superconductivity of CrAs.

Authors:
 [1];  [2];  [1];  [3];  [1];  [4];  [2];  [5];  [6];  [1]
+ Show Author Affiliations
  1. Center for High Pressure Science and Technology Advanced Research, Shanghai (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China)
  3. Harbin Inst. of Technology (China)
  4. Chinese Academy of Sciences, Shanghai (China)
  5. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  6. Center for High Pressure Science and Technology Advanced Research, Shanghai (China); Jilin Univ., Changchun (China)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Associated Funding; Natural Science Foundation of China; Ministry of Science and Technology of China; Chinese Academy of Sciences
OSTI Identifier:
1354267
Report Number(s):
BNL-112783-2016-JA
Journal ID: ISSN 0027-8424
Grant/Contract Number:  
SC00112704; U1530402; 11004072; 10904022; 2014CB921500; XDB07020100
Resource Type:
Accepted Manuscript
Journal Name:
Proceedings of the National Academy of Sciences of the United States of America
Additional Journal Information:
Journal Volume: 112; Journal Issue: 48; Journal ID: ISSN 0027-8424
Publisher:
National Academy of Sciences
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CrAs; anisotropic compression behavior; high pressure; phase transformation

Citation Formats

Yu, Zhenhai, Wu, Wei, Hu, Qingyang, Zhao, Jinggeng, Li, Chunyu, Yang, Ke, Cheng, Jinguang, Luo, Jianlin, Wang, Lin, and Mao, Ho-kwang. Anomalous anisotropic compression behavior of superconducting CrAs under high pressure. United States: N. p., 2015. Web. doi:10.1073/pnas.1520570112.
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Yu, Zhenhai, Wu, Wei, Hu, Qingyang, Zhao, Jinggeng, Li, Chunyu, Yang, Ke, Cheng, Jinguang, Luo, Jianlin, Wang, Lin, & Mao, Ho-kwang. Anomalous anisotropic compression behavior of superconducting CrAs under high pressure. United States. https://doi.org/10.1073/pnas.1520570112
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Yu, Zhenhai, Wu, Wei, Hu, Qingyang, Zhao, Jinggeng, Li, Chunyu, Yang, Ke, Cheng, Jinguang, Luo, Jianlin, Wang, Lin, and Mao, Ho-kwang. Mon . "Anomalous anisotropic compression behavior of superconducting CrAs under high pressure". United States. https://doi.org/10.1073/pnas.1520570112. https://www.osti.gov/servlets/purl/1354267.
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@article{osti_1354267,
title = {Anomalous anisotropic compression behavior of superconducting CrAs under high pressure},
author = {Yu, Zhenhai and Wu, Wei and Hu, Qingyang and Zhao, Jinggeng and Li, Chunyu and Yang, Ke and Cheng, Jinguang and Luo, Jianlin and Wang, Lin and Mao, Ho-kwang},
abstractNote = {CrAs was observed to possess the bulk superconductivity under high-pressure conditions. To understand the superconducting mechanism and explore the correlation between the structure and superconductivity, the high-pressure structural evolution of CrAs was investigated using the angle-dispersive X-ray diffraction (XRD) method. The structure of CrAs remains stable up to 1.8 GPa, whereas the lattice parameters exhibit anomalous compression behaviors. With increasing pressure, the lattice parameters a and c both demonstrate a nonmonotonic change, and the lattice parameter b undergoes a rapid contraction at ~0.18–0.35 GPa, which suggests that a pressure-induced isostructural phase transition occurs in CrAs. Above the phase transition pressure, the axial compressibilities of CrAs present remarkable anisotropy. A schematic band model was used to address the anomalous compression behavior of CrAs. Lastly, the present results shed light on the structural and related electronic responses to high pressure, which play a key role toward understanding the superconductivity of CrAs.},
doi = {10.1073/pnas.1520570112},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
number = 48,
volume = 112,
place = {United States},
year = {Mon Nov 16 00:00:00 EST 2015},
month = {Mon Nov 16 00:00:00 EST 2015}
}
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https://doi.org/10.1073/pnas.1520570112
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    Metal-insulator transition and magnetic fluctuations in polycrystalline Ru 1 − x Rh x P investigated by P 31 NMR
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    Anomalous compression behaviour in Nd 2 O 3 studied by x-ray diffraction and Raman spectroscopy
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    • Jiang, Sheng; Liu, Jing; Bai, Ligang
    • AIP Advances, Vol. 8, Issue 2
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