Fermi surface investigation of the filled skutterudite LaRu4As12

被引：6

作者：

Klotz, J. ^{[1
,2
,3
]}

Goetze, K. ^{[1
,2
,3
]}

Lorenz, V ^{[4
]}

Prots, Yu ^{[4
]}

Rosner, H. ^{[5
]}

Harima, H. ^{[6
]}

Bochenek, L. ^{[6
]}

Cichorek, T. ^{[6
]}

Sheikin, I ^{[7
]}

Wosnitza, J. ^{[1
,2
,3
]}

机构：

[1] Hochfeld Magnetlab Dresden HLD EMFL, D-01328 Dresden, Germany

[2] Helmholtz Zentrum Dresden Rossendoif, Wurzburg Dresden Cluster Excellence Ctqmat, D-01328 Dresden, Germany

[3] Tech Univ Dresden, Inst Festkorper & Mat Phys, D-01062 Dresden, Germany

[4] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[5] Kobe Univ, Grad Sch Sci, Kobe, Hyogo 6578501, Japan

[6] Polish Acad Sci, Inst Low Temp & Struct Res, PL-50950 Wroclaw, Poland

[7] UGA, CNRS, EMFL, LNCMI, F-38042 Grenoble, France

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 20期

基金：

英国工程与自然科学研究理事会;

关键词：

VAN-ALPHEN OSCILLATIONS; MAGNETIC-PROPERTIES; SUPERCONDUCTIVITY; ARSENIDES; LAFE4P12; CRYSTAL; STATES; EARTH; HEAT; GAP;

D O I：

10.1103/PhysRevB.100.205106

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Of all stoichiometric filled-skutterudite superconductors, LaRu4As12 has the highest critical field and temperature. Here we report on a detailed Fermi-surface investigation of LaRu4As12 by means of de Haas-van Alphen measurements and density-functional-theory calculations. We find evidence for a nearly spherical and a multiply connected Fermi-surface sheet. The different effective masses and mass enhancements for the two sheets support two-band superconductivity, which was inferred from previous specific-heat measurements. Furthermore, quantum oscillations persist as well in the superconducting phase. We use two models to describe the additional damping, yielding energy gaps differing by a factor of 5.

引用

页数：8

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