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Title: Conventional empirical law reverses in the phase transitions of 122-type iron-based superconductors

Abstract

Phase transition of solid-state materials is a fundamental research topic in condensed matter physics, materials science and geophysics. It has been well accepted and widely proven that isostructural compounds containing different cations undergo same pressure-induced phase transitions but at progressively lower pressures as the cation radii increases. However, we discovered that this conventional law reverses in the structural transitions in 122-type iron-based superconductors. In this report, a combined low temperature and high pressure X-ray diffraction (XRD) measurement has identified the phase transition curves among the tetragonal (T), orthorhombic (O) and the collapsed-tetragonal (cT) phases in the structural phase diagram of the iron-based superconductor AFe2As2 (A = Ca, Sr, Eu, and Ba). As a result, the cation radii dependence of the phase transition pressure (T → cT) shows an opposite trend in which the compounds with larger ambient radii cations have a higher transition pressure.

Authors:
 [1];  [2];  [3];  [4];  [3];  [1];  [5];  [6];  [7];  [8];  [9];  [10];  [11]
  1. Center for High Pressure Science and Technology Advanced Research, Shanghai (China)
  2. Center for High Pressure Science and Technology Advanced Research, Shanghai (China); Jilin Univ., Changchun (China); Carnegie Institute of Washington, Argonne, IL (United States)
  3. Harbin Institute of Technology, Harbin (China)
  4. Center for High Pressure Science and Technology Advanced Research, Shanghai (China); Harbin Institute of Technology, Harbin (China)
  5. Carnegie Institute of Washington, Argonne, IL (United States)
  6. Chinese Academy of Sciences (CAS), Beijing (China)
  7. Chinese Academy of Sciences (CAS), Beijing (China); Collaborative Innovation Center of Quantum Matter, Beijing (China)
  8. Collaborative Innovation Center of Quantum Matter, Beijing (China); Peking Univ., Beijing (China)
  9. Chinese Academy of Sciences (CAS), Shanghai (China)
  10. Univ. of Nevada, Las Vegas, NV (United States)
  11. Center for High Pressure Science and Technology Advanced Research, Shanghai (China); Carnegie Institute of Washington, Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1164958
Alternate Identifier(s):
OSTI ID: 1210834
Grant/Contract Number:  
AC02-06CH11357; SC0001057
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 4; Journal Issue: 11, 2014; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
ENGLISH
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; phase transitions and critical phenomena; structure of solids and liquids; catalysis (heterogeneous); solar (photovoltaic); phonons; thermoelectric; energy storage (including batteries and capacitors); hydrogen and fuel cells; superconductivity; charge transport; mesostructured materials; materials and chemistry by design; synthesis (novel materials)

Citation Formats

Yu, Zhenhai, Wang, Lin, Wang, Luhong, Liu, Haozhe, Zhao, Jinggeng, Li, Chunyu, Sinogeikin, Stanislav, Wu, Wei, Luo, Jianlin, Wang, Nanlin, Yang, Ke, Zhao, Yusheng, and Mao, Ho -kwang. Conventional empirical law reverses in the phase transitions of 122-type iron-based superconductors. United States: N. p., 2014. Web. doi:10.1038/srep07172.
Yu, Zhenhai, Wang, Lin, Wang, Luhong, Liu, Haozhe, Zhao, Jinggeng, Li, Chunyu, Sinogeikin, Stanislav, Wu, Wei, Luo, Jianlin, Wang, Nanlin, Yang, Ke, Zhao, Yusheng, & Mao, Ho -kwang. Conventional empirical law reverses in the phase transitions of 122-type iron-based superconductors. United States. https://doi.org/10.1038/srep07172
Yu, Zhenhai, Wang, Lin, Wang, Luhong, Liu, Haozhe, Zhao, Jinggeng, Li, Chunyu, Sinogeikin, Stanislav, Wu, Wei, Luo, Jianlin, Wang, Nanlin, Yang, Ke, Zhao, Yusheng, and Mao, Ho -kwang. Mon . "Conventional empirical law reverses in the phase transitions of 122-type iron-based superconductors". United States. https://doi.org/10.1038/srep07172. https://www.osti.gov/servlets/purl/1164958.
@article{osti_1164958,
title = {Conventional empirical law reverses in the phase transitions of 122-type iron-based superconductors},
author = {Yu, Zhenhai and Wang, Lin and Wang, Luhong and Liu, Haozhe and Zhao, Jinggeng and Li, Chunyu and Sinogeikin, Stanislav and Wu, Wei and Luo, Jianlin and Wang, Nanlin and Yang, Ke and Zhao, Yusheng and Mao, Ho -kwang},
abstractNote = {Phase transition of solid-state materials is a fundamental research topic in condensed matter physics, materials science and geophysics. It has been well accepted and widely proven that isostructural compounds containing different cations undergo same pressure-induced phase transitions but at progressively lower pressures as the cation radii increases. However, we discovered that this conventional law reverses in the structural transitions in 122-type iron-based superconductors. In this report, a combined low temperature and high pressure X-ray diffraction (XRD) measurement has identified the phase transition curves among the tetragonal (T), orthorhombic (O) and the collapsed-tetragonal (cT) phases in the structural phase diagram of the iron-based superconductor AFe2As2 (A = Ca, Sr, Eu, and Ba). As a result, the cation radii dependence of the phase transition pressure (T → cT) shows an opposite trend in which the compounds with larger ambient radii cations have a higher transition pressure.},
doi = {10.1038/srep07172},
journal = {Scientific Reports},
number = 11, 2014,
volume = 4,
place = {United States},
year = {Mon Nov 24 00:00:00 EST 2014},
month = {Mon Nov 24 00:00:00 EST 2014}
}

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