Are AuPd
Heusler compounds
electronic structure
non-centrosymmetric
superconductivity
Journal
Materials (Basel, Switzerland)
ISSN: 1996-1944
Titre abrégé: Materials (Basel)
Pays: Switzerland
ID NLM: 101555929
Informations de publication
Date de publication:
13 Aug 2019
13 Aug 2019
Historique:
received:
22
07
2019
revised:
06
08
2019
accepted:
07
08
2019
entrez:
16
8
2019
pubmed:
16
8
2019
medline:
16
8
2019
Statut:
epublish
Résumé
Heusler compounds with 2:1:1 stoichiometry either have a centrosymmetric Cu 2 MnAl structure or an Li 2 AgSb structure without a centre of inversion. The centrosymmetry is always lost in quaternary Heusler compounds with 1:1:1:1 stoichiometry and LiMgPdSn structure. This presents the possibility of realizing non-centrosymmetric superconductors in the family of Heusler compounds. The objective of this study is to search for and investigate such quaternary derivatives of Heusler compounds, particularly with respect to superconductivity. Several compounds were identified by carrying out calculations from first principles and superconductivity was observed in experiments conducted on AuPdScAl and AuPtScIn at the critical temperatures of 3.0 and 0.96 K, respectively. All investigated compounds had a valence electron count of 27, which is also the case in centrosymmetric Heusler superconductors.
Identifiants
pubmed: 31412638
pii: ma12162580
doi: 10.3390/ma12162580
pmc: PMC6719038
pii:
doi:
Types de publication
Journal Article
Langues
eng
Références
Phys Rev Lett. 1996 Oct 28;77(18):3865-3868
pubmed: 10062328
Phys Rev Lett. 2004 Jan 16;92(2):027003
pubmed: 14753961
Phys Rev Lett. 2005 Dec 9;95(24):247004
pubmed: 16384411
Phys Rev Lett. 2013 Mar 8;110(10):100401
pubmed: 23521232
Phys Rev B Condens Matter. 1985 Jul 1;32(1):135-138
pubmed: 9936647
Phys Rev B Condens Matter. 1986 Jul 1;34(1):199-202
pubmed: 9939252