Testing V3Si for two-band superconductivity

被引：9
作者：
Zehetmayer, M. [1 ]
Hecher, J. [1 ]
机构：
[1] Vienna Univ Technol, Atominst, A-1020 Vienna, Austria
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2014年 / 27卷 / 04期
基金：
奥地利科学基金会;
关键词：
two-band superconductivity; Ginzburg-Landau; reversible magnetization; UPPER CRITICAL-FIELD; SINGLE-CRYSTALS; ANISOTROPY; SYMMETRY;
D O I：
10.1088/0953-2048/27/4/044006
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Is V3Si a two-band or a single-band superconductor? Everyone who searches the literature for this question will find conflicting answers, for V3Si was claimed to be a perfect example of two-band and claimed to be a perfect example of single-band superconductivity. In this paper we intend to clarify the situation by presenting new experimental facts acquired from the magnetic properties of a V3Si single crystal. We probe for field-dependent two-band effects by analyzing the reversible magnetization at different temperatures, and we probe for temperature-dependent two-band effects by analyzing the superfluid density obtained by two different methods at different magnetic fields. All our results are reliably described within the single-band models and thus support the single-band scenario for V3Si but do not completely rule out the presence of a very small second gap.
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页数：6
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