Pressure-induced shift of Tc and structural transition in “122” type pnictide superconductor Ca0.34Na0.66Fe2As2
- 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)
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.
- Research Organization:
- Univ. of Nevada, Las Vegas, NV (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- NA0001982
- OSTI ID:
- 1332361
- Journal Information:
- AIP Advances, Vol. 6, Issue 7; ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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