Pressure-induced shift of Tc and structural transition in “122” type pnictide superconductor Ca0.34Na0.66Fe2As2

Zhang, Sijia; Zhao, Kan; Yu, Xiaohui; Zhu, Jinlong; Liu, Qingqing; Wang, Xiancheng; Feng, Shaomin; Chen, Zhiqiang; Zhao, Yusheng; Jin, Changqing

doi:10.1063/1.4958873

Title: Pressure-induced shift of T_c and structural transition in “122” type pnictide superconductor Ca_0.34Na_0.66Fe₂As₂

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Abstract

Here, the effect of pressure on superconductivity of “122” type Ca_1-xNa_xFe₂As₂ (x=0.66 single crystal is investigated through the temperature dependence of resistanc measurement. Optimal Na doped (Ca_0.34Na_0.66)Fe₂As₂ 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)Fe₂As₂ 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:

Zhang, Sijia ^[1]; Zhao, Kan ^[1]; Yu, Xiaohui ^[2]; Zhu, Jinlong ^[3]; Liu, Qingqing ^[1]; Wang, Xiancheng ^[1]; Feng, Shaomin ^[1]; Chen, Zhiqiang ^[4]; Zhao, Yusheng ^[5]; Jin, Changqing ^[1]

Chinese Academy of Sciences (CAS), Beijing (China)
Chinese Academy of Sciences (CAS), Beijing (China); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Nevada, Las Vegas, NV (United States)
Brookhaven National Lab. (BNL), Upton, NY (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: Mon Jul 11 00:00:00 EDT 2016

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:: 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.

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                    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.  https://doi.org/10.1063/1.4958873

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                    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.  https://doi.org/10.1063/1.4958873.  https://www.osti.gov/servlets/purl/1332361.

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@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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Title: Pressure-induced shift of Tc and structural transition in “122” type pnictide superconductor Ca0.34Na0.66Fe2As2

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Citation Formats

Title: Pressure-induced shift of T_c and structural transition in “122” type pnictide superconductor Ca_0.34Na_0.66Fe₂As₂