Two-band superconductivity featuring different anisotropies in the ternary iron silicide Lu 2Fe 3Si 5

Yasuyuki Nakajima; Hikaru Hidaka; Tsuyoshi Nakagawa; Tsuyoshi Tamegai; Terukazu Nishizaki; Takahiko Sasaki; Norio Kobayashi

doi:10.1103/PhysRevB.85.174524

Two-band superconductivity featuring different anisotropies in the ternary iron silicide Lu ₂Fe ₃Si ₅

Yasuyuki Nakajima, Hikaru Hidaka, Tsuyoshi Nakagawa, Tsuyoshi Tamegai, Terukazu Nishizaki, Takahiko Sasaki, Norio Kobayashi

Institute for Materials Research (IMR)

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

We report detailed studies of the upper critical field and low-temperature specific heat in the two-gap superconductor Lu ₂Fe ₃Si ₅. The anisotropy of the upper critical field suggests that the active band is quasi-one-dimensional. Low-temperature specific heat in magnetic fields reveals that the virtual H _c2 in the passive band is almost isotropic. These results strongly indicate that the two bands have two different anisotropies, similar to the typical two-gap superconductor MgB ₂, and their interplay may be essential to the two-gap superconductivity in Lu ₂Fe ₃Si ₅.

Original language	English
Article number	174524
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	85
Issue number	17
DOIs	https://doi.org/10.1103/PhysRevB.85.174524
Publication status	Published - 2012 May 23

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Two-band superconductivity featuring different anisotropies in the ternary iron silicide Lu ₂Fe ₃Si ₅ . / Nakajima, Yasuyuki; Hidaka, Hikaru; Nakagawa, Tsuyoshi; Tamegai, Tsuyoshi; Nishizaki, Terukazu; Sasaki, Takahiko; Kobayashi, Norio.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 17, 174524, 23.05.2012.

Research output: Contribution to journal › Article › peer-review

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