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

Autor:	Alexander Buckow, Lambert Alff, Jose Kurian, Stefan Schmidt, Holger Mühlig, S. J. Ray, Philipp Komissinskiy, Frank Schmidl, Paul Seidel, Reiner Retzlaff
Rok vydání:	2015
Předmět:	Superconductivity Diffraction Crystallography Materials science Condensed matter physics X-ray photoelectron spectroscopy Electron diffraction Thin film Condensed Matter Physics Epitaxy Pnictogen Electronic Optical and Magnetic Materials Molecular beam epitaxy
Zdroj:	Physical Review B. 91
ISSN:	1550-235X 1098-0121
DOI:	10.1103/physrevb.91.104519
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4c56cac736f8c7e665301456a7cb7027 https://doi.org/10.1103/physrevb.91.104519 Zobrazit plný text záznamu