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Title: Pressure-induced shift of T c and structural transition in “122” type pnictide superconductor Ca 0.34Na 0.66Fe 2As 2

Abstract

Here, the effect of pressure on superconductivity of “122” type Ca 1-xNa xFe 2As 2 (x=0.66 single crystal is investigated through the temperature dependence of resistanc measurement. Optimal Na doped (Ca 0.34Na 0.66)Fe 2As 2 shows a superconductin transition with T c ~ 33 K at ambient pressure. With application of pressure, T decreases nearly linearly with d Tc/d P ~ -1.7K/GPa at pressures lower than 2 GPa and disappears gradually at higher pressure. The disappearance of superconductivit is also companied with the recovery of standard Fermi liquid behaviors of th normal-state transport properties. Moreover, (Ca 0.34Na 0.66)Fe 2As 2 exhibits a tetragona (T) to collapsed-tetragonal (c T) transition at about 3 GPa. The evolution o non-Fermi liquid behaviors and superconductivity under pressure are both relate to the interband fluctuations.

Authors:
 [1];  [1];  [2];  [3];  [1];  [1];  [1];  [4];  [5];  [1]
  1. Chinese Academy of Sciences (CAS), Beijing (China)
  2. Chinese Academy of Sciences (CAS), Beijing (China); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  3. Univ. of Nevada, Las Vegas, NV (United States)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States)
  5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Univ. of Nevada, Las Vegas, NV (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1332361
Grant/Contract Number:
NA0001982
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 6; Journal Issue: 7; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; sodium; high pressure; diamond anvil cells; superconducting transitions; single crystals

Citation Formats

Zhang, Sijia, Zhao, Kan, Yu, Xiaohui, Zhu, Jinlong, Liu, Qingqing, Wang, Xiancheng, Feng, Shaomin, Chen, Zhiqiang, Zhao, Yusheng, and Jin, Changqing. Pressure-induced shift of Tc and structural transition in “122” type pnictide superconductor Ca0.34Na0.66Fe2As2. United States: N. p., 2016. Web. doi:10.1063/1.4958873.
Zhang, Sijia, Zhao, Kan, Yu, Xiaohui, Zhu, Jinlong, Liu, Qingqing, Wang, Xiancheng, Feng, Shaomin, Chen, Zhiqiang, Zhao, Yusheng, & Jin, Changqing. Pressure-induced shift of Tc and structural transition in “122” type pnictide superconductor Ca0.34Na0.66Fe2As2. United States. doi:10.1063/1.4958873.
Zhang, Sijia, Zhao, Kan, Yu, Xiaohui, Zhu, Jinlong, Liu, Qingqing, Wang, Xiancheng, Feng, Shaomin, Chen, Zhiqiang, Zhao, Yusheng, and Jin, Changqing. Mon . "Pressure-induced shift of Tc and structural transition in “122” type pnictide superconductor Ca0.34Na0.66Fe2As2". United States. doi:10.1063/1.4958873. https://www.osti.gov/servlets/purl/1332361.
@article{osti_1332361,
title = {Pressure-induced shift of Tc and structural transition in “122” type pnictide superconductor Ca0.34Na0.66Fe2As2},
author = {Zhang, Sijia and Zhao, Kan and Yu, Xiaohui and Zhu, Jinlong and Liu, Qingqing and Wang, Xiancheng and Feng, Shaomin and Chen, Zhiqiang and Zhao, Yusheng and Jin, Changqing},
abstractNote = {Here, the effect of pressure on superconductivity of “122” type Ca1-xNaxFe2As2 (x=0.66 single crystal is investigated through the temperature dependence of resistanc measurement. Optimal Na doped (Ca0.34Na0.66)Fe2As2 shows a superconductin transition with Tc ~ 33 K at ambient pressure. With application of pressure, T decreases nearly linearly with dTc/dP ~ -1.7K/GPa at pressures lower than 2 GPa and disappears gradually at higher pressure. The disappearance of superconductivit is also companied with the recovery of standard Fermi liquid behaviors of th normal-state transport properties. Moreover, (Ca0.34Na0.66)Fe2As2 exhibits a tetragona (T) to collapsed-tetragonal (cT) transition at about 3 GPa. The evolution o non-Fermi liquid behaviors and superconductivity under pressure are both relate to the interband fluctuations.},
doi = {10.1063/1.4958873},
journal = {AIP Advances},
number = 7,
volume = 6,
place = {United States},
year = {Mon Jul 11 00:00:00 EDT 2016},
month = {Mon Jul 11 00:00:00 EDT 2016}
}

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