Superconducting state in the ternary stannide superconductors R 3T4Sn13 (R = La, Sr; T = Rh, Ir) with a quasiskutterudite structure

N. Kase, H. Hayamizu, Jun Akimitsu

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Single crystals of R3T4Sn13 (R = La, Sr; T = Rh, Ir) are synthesized by a Sn-flux method. Superconducting transition temperatures Tc are determined on the basis of magnetic susceptibility and electrical resistivity measurements. For La3T 4Sn13, Tc = 3.1 and 2.5 K when T = Rh and Ir, respectively; similarly, for Sr3T4Sn13, T c = 4.2 and 5.0 K. Specific heat measurements indicate that superconducting gaps of these compounds are isotropic and that these superconductors can be categorized as strong-coupling superconductors on the basis of the values of ΔCe/γTc and 2Δ(0)/kBTc. The upper critical field shows a clear enhancement with respect to the Werthamer-Helfand-Hohenberg prediction; this enhancement is consistent with the presence of a strong electron-phonon coupling. We summarized the normal and superconducting parameters of R 3T4Sn13 (R = La, Sr; T = Rh, Ir) in Table.

Original languageEnglish
Article number184509
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume83
Issue number18
DOIs
Publication statusPublished - May 17 2011
Externally publishedYes

Fingerprint

Superconducting materials
Thermal variables measurement
electrical resistivity
augmentation
Magnetic susceptibility
Superconducting transition temperature
Specific heat
heat measurement
transition temperature
specific heat
Single crystals
Fluxes
magnetic permeability
Electrons
single crystals
predictions
electrons

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

@article{4472073543084a278a5f5d563706b946,
title = "Superconducting state in the ternary stannide superconductors R 3T4Sn13 (R = La, Sr; T = Rh, Ir) with a quasiskutterudite structure",
abstract = "Single crystals of R3T4Sn13 (R = La, Sr; T = Rh, Ir) are synthesized by a Sn-flux method. Superconducting transition temperatures Tc are determined on the basis of magnetic susceptibility and electrical resistivity measurements. For La3T 4Sn13, Tc = 3.1 and 2.5 K when T = Rh and Ir, respectively; similarly, for Sr3T4Sn13, T c = 4.2 and 5.0 K. Specific heat measurements indicate that superconducting gaps of these compounds are isotropic and that these superconductors can be categorized as strong-coupling superconductors on the basis of the values of ΔCe/γTc and 2Δ(0)/kBTc. The upper critical field shows a clear enhancement with respect to the Werthamer-Helfand-Hohenberg prediction; this enhancement is consistent with the presence of a strong electron-phonon coupling. We summarized the normal and superconducting parameters of R 3T4Sn13 (R = La, Sr; T = Rh, Ir) in Table.",
author = "N. Kase and H. Hayamizu and Jun Akimitsu",
year = "2011",
month = "5",
day = "17",
doi = "10.1103/PhysRevB.83.184509",
language = "English",
volume = "83",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Physical Society",
number = "18",

}

TY - JOUR

T1 - Superconducting state in the ternary stannide superconductors R 3T4Sn13 (R = La, Sr; T = Rh, Ir) with a quasiskutterudite structure

AU - Kase, N.

AU - Hayamizu, H.

AU - Akimitsu, Jun

PY - 2011/5/17

Y1 - 2011/5/17

N2 - Single crystals of R3T4Sn13 (R = La, Sr; T = Rh, Ir) are synthesized by a Sn-flux method. Superconducting transition temperatures Tc are determined on the basis of magnetic susceptibility and electrical resistivity measurements. For La3T 4Sn13, Tc = 3.1 and 2.5 K when T = Rh and Ir, respectively; similarly, for Sr3T4Sn13, T c = 4.2 and 5.0 K. Specific heat measurements indicate that superconducting gaps of these compounds are isotropic and that these superconductors can be categorized as strong-coupling superconductors on the basis of the values of ΔCe/γTc and 2Δ(0)/kBTc. The upper critical field shows a clear enhancement with respect to the Werthamer-Helfand-Hohenberg prediction; this enhancement is consistent with the presence of a strong electron-phonon coupling. We summarized the normal and superconducting parameters of R 3T4Sn13 (R = La, Sr; T = Rh, Ir) in Table.

AB - Single crystals of R3T4Sn13 (R = La, Sr; T = Rh, Ir) are synthesized by a Sn-flux method. Superconducting transition temperatures Tc are determined on the basis of magnetic susceptibility and electrical resistivity measurements. For La3T 4Sn13, Tc = 3.1 and 2.5 K when T = Rh and Ir, respectively; similarly, for Sr3T4Sn13, T c = 4.2 and 5.0 K. Specific heat measurements indicate that superconducting gaps of these compounds are isotropic and that these superconductors can be categorized as strong-coupling superconductors on the basis of the values of ΔCe/γTc and 2Δ(0)/kBTc. The upper critical field shows a clear enhancement with respect to the Werthamer-Helfand-Hohenberg prediction; this enhancement is consistent with the presence of a strong electron-phonon coupling. We summarized the normal and superconducting parameters of R 3T4Sn13 (R = La, Sr; T = Rh, Ir) in Table.

UR - http://www.scopus.com/inward/record.url?scp=79961154068&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79961154068&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.83.184509

DO - 10.1103/PhysRevB.83.184509

M3 - Article

AN - SCOPUS:79961154068

VL - 83

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 18

M1 - 184509

ER -