Superconductivity in Y7 R u4InG e12

Jin Ke Bao, Daniel E. Bugaris, Huihuo Zheng, Kristin Willa, Ulrich Welp, Duck Young Chung, Mercouri G Kanatzidis

Research output: Contribution to journalArticle

Abstract

We report a type-II intermetallic superconductor Y7Ru4InGe12 with a transition temperature (Tc) of ∼5.8 K, which is confirmed by zero resistivity, diamagnetic magnetic susceptibility, and specific-heat jump. Single crystals of Y7Ru4InGe12 were grown from a reactive indium flux. Y7Ru4InGe12 crystallizes in the tetragonal space group P4/m and features a [Ru4InGe12] polyanionic network with Y atoms located in three different channels. The upper critical fields of Y7Ru4InGe12 at 0 K are determined to be ∼5.3 and 2.4 T along the c axis and the ab plane, respectively. The estimated coherence length along the c axis (∼174 Å) is much larger than the estimated mean free path along the c axis (∼29 Å) in Y7Ru4InGe12, placing its superconductivity in the so-called dirty regime. The compound exhibits a large superconducting specific-heat jump ΔCγeTc≈2.4, significantly well above the weak-coupling Barden-Cooper-Schrieffer theoretical value of 1.43 and pointing to a strong-coupling scenario in Y7Ru4InGe12. Density-functional-theory calculations show that the density of states in Y7Ru4InGe12 exhibits a broad peak near the Fermi level which mainly derives from Y-4d,Ru-4d, and Ge-4p states.

Original languageEnglish
Article number024802
JournalPhysical Review Materials
Volume3
Issue number2
DOIs
Publication statusPublished - Feb 12 2019

Fingerprint

Superconductivity
Specific heat
superconductivity
Indium
Fermi level
Magnetic susceptibility
specific heat
Superconducting materials
Superconducting transition temperature
Intermetallics
Density functional theory
Single crystals
Fluxes
mean free path
Atoms
intermetallics
indium
transition temperature
density functional theory
magnetic permeability

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

Cite this

Bao, J. K., Bugaris, D. E., Zheng, H., Willa, K., Welp, U., Chung, D. Y., & Kanatzidis, M. G. (2019). Superconductivity in Y7 R u4InG e12. Physical Review Materials, 3(2), [024802]. https://doi.org/10.1103/PhysRevMaterials.3.024802

Superconductivity in Y7 R u4InG e12. / Bao, Jin Ke; Bugaris, Daniel E.; Zheng, Huihuo; Willa, Kristin; Welp, Ulrich; Chung, Duck Young; Kanatzidis, Mercouri G.

In: Physical Review Materials, Vol. 3, No. 2, 024802, 12.02.2019.

Research output: Contribution to journalArticle

Bao, JK, Bugaris, DE, Zheng, H, Willa, K, Welp, U, Chung, DY & Kanatzidis, MG 2019, 'Superconductivity in Y7 R u4InG e12', Physical Review Materials, vol. 3, no. 2, 024802. https://doi.org/10.1103/PhysRevMaterials.3.024802
Bao JK, Bugaris DE, Zheng H, Willa K, Welp U, Chung DY et al. Superconductivity in Y7 R u4InG e12. Physical Review Materials. 2019 Feb 12;3(2). 024802. https://doi.org/10.1103/PhysRevMaterials.3.024802
Bao, Jin Ke ; Bugaris, Daniel E. ; Zheng, Huihuo ; Willa, Kristin ; Welp, Ulrich ; Chung, Duck Young ; Kanatzidis, Mercouri G. / Superconductivity in Y7 R u4InG e12. In: Physical Review Materials. 2019 ; Vol. 3, No. 2.
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