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Doping effect on the physical properties of Ca10Pt3As8(Fe2As2)5 single crystals

Journal Article · · Journal of Physics. Condensed Matter
 [1];  [2];  [2];  [2]
  1. Louisiana State Univ., Baton Rouge, LA (United States); Louisiana State University
  2. Louisiana State Univ., Baton Rouge, LA (United States)

Ca10Pt3As8(Fe2As2)5 is a unique parent compound for superconductivity, which consists of both semiconducting Pt3As8 and metallic FeAs layers. We report the observation of superconductivity induced via chemical doping in either Ca site using rare-earth (RE) elements (RE = La, Gd) or Fe site using Pt. The interlayer distance and the normal-state physical properties of the doped system change correspondingly. The coupled changes include (1) superconducting transition temperature Tc increases with increasing both doping concentration and interlayer distance, (2) our Tc value is higher than previously reported maximum value for Pt doping in the Fe site, (3) both the normal-state in-plane resistivity and out-of-plane resistivity change from non-metallic to metallic behavior with increasing doping concentration and Tc, and (4) the transverse in-plane magnetoresistance (MRab) changes from linear-field dependence to quadratic behavior upon increasing Tc. For La-doped compound with the highest Tc (~35 K), upper critical fields ($$H_{c2}^{ab} , H_{c2}^c$$), coherence lengths (ξab, ξc), and in-plane penetration depth (λab) are estimated. Finally, we discuss the relationship between chemical doping, interlayer distance, and physical properties in this system.

Research Organization:
Louisiana State Univ., Baton Rouge, LA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
SC0012432
OSTI ID:
1673630
Alternate ID(s):
OSTI ID: 1540417
OSTI ID: 23006553
Journal Information:
Journal of Physics. Condensed Matter, Journal Name: Journal of Physics. Condensed Matter Journal Issue: 48 Vol. 29; ISSN 0953-8984
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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