Large enhancement of superconducting transition temperature in single-element superconducting rhenium by shear strain

• DOI: 10.1038/srep36337
• Publication Date: 2016-11-04T10:08:03Z
• Authors: Masaki Mito; Hideaki Matsui; Kazuki Tsuruta; Tomiko Yamaguchi; Kazuma Nakamura; Hiroyuki Deguchi; Naoki Shirakawa; Hiroki Adachi; Tohru Yamasaki; Hideaki Iwaoka; Yoshifumi Ikoma; Zenji Horita
• Keywords: Strain (injury); Transition temperature

Abstract Finding a physical approach for increasing the superconducting transition temperature ( T c ) is challenge in field of material science. Shear strain effects on superconductivity rhenium were investigated using magnetic measurements, X-ray diffraction, transmission electron microscopy, and first-principles calculations. A large shear reduces grain size simultaneously expands unit cells, resulting an increase . Here we show that this new method enhancing differs from hydrostatic strain. The enhancement explained by net electron–electron coupling rather than change density states near Fermi level. effect could be successful example manipulating Bardeen–Cooper–Schrieffer-type Cooper pairing, which cell volumes are indeed key parameter.