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Superconductivity and role of pnictogen and Fe substitution in 112-LaPdxPn2(Pn=Sb,Bi)

Retzlaff, Reiner and Buckow, Alexander and Komissinskiy, Philipp and Ray, Soumya and Schmidt, Stefan and Mühlig, Holger and Schmidl, Frank and Seidel, Paul and Kurian, Jose and Alff, Lambert (2015):
Superconductivity and role of pnictogen and Fe substitution in 112-LaPdxPn2(Pn=Sb,Bi).
In: Physical Review B, APS Publications, 91, (10), ISSN 1098-0121, [Online-Edition: http://dx.doi.org/10.1103/PhysRevB.91.104519],
[Article]

Abstract

We report on the epitaxial growth of As-free and phase-pure thin films of the 112-pnictide compounds LaPdxPn2 (Pn=Sb,Bi) grown on (100) MgO substrates by molecular beam epitaxy. X-ray diffraction, reflection high-energy electron diffraction, and x-ray photoelectron spectroscopy confirm the HfCuSi2 structure of the material with a peculiar pnictogen square net layer. The superconducting transition temperature Tc varies little with Pd concentration. LaPdxSb2 has a higher Tc (3.2 K) by about 20% compared with LaPdxBi2 (2.7 K). Fe substitution of Pd leads to a rapid decay of superconductivity, suggesting that these superconductors are conventional type II.

Item Type: Article
Erschienen: 2015
Creators: Retzlaff, Reiner and Buckow, Alexander and Komissinskiy, Philipp and Ray, Soumya and Schmidt, Stefan and Mühlig, Holger and Schmidl, Frank and Seidel, Paul and Kurian, Jose and Alff, Lambert
Title: Superconductivity and role of pnictogen and Fe substitution in 112-LaPdxPn2(Pn=Sb,Bi)
Language: English
Abstract:

We report on the epitaxial growth of As-free and phase-pure thin films of the 112-pnictide compounds LaPdxPn2 (Pn=Sb,Bi) grown on (100) MgO substrates by molecular beam epitaxy. X-ray diffraction, reflection high-energy electron diffraction, and x-ray photoelectron spectroscopy confirm the HfCuSi2 structure of the material with a peculiar pnictogen square net layer. The superconducting transition temperature Tc varies little with Pd concentration. LaPdxSb2 has a higher Tc (3.2 K) by about 20% compared with LaPdxBi2 (2.7 K). Fe substitution of Pd leads to a rapid decay of superconductivity, suggesting that these superconductors are conventional type II.

Journal or Publication Title: Physical Review B
Volume: 91
Number: 10
Publisher: APS Publications
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 21 Apr 2015 10:58
Official URL: http://dx.doi.org/10.1103/PhysRevB.91.104519
Identification Number: doi:10.1103/PhysRevB.91.104519
Funders: This work was supported by the Deutsche Forschungsgemeinschaft (DFG) through Grant No. SPP 1458 (LA 560/10-2 and SE 664/15-2). , This work was partially supported by the Landesgraduiertenförderung Thüringen.
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