標題: Type I superconductivity in Dirac materials
作者: Shapiro, B. Ya
Shapiro, I.
Li, Dingping
Rosenstein, Baruch
電子物理學系
Department of Electrophysics
關鍵字: Dirac semi-metals;magnetic properties of superconductors;Ginzburg Landau theory
公開日期: 22-Aug-2018
摘要: Superconductivity of the second kind was observed in many 3D Weyl and Dirac semi-metals while in the PdTe2, superconductivity is clearly of the first kind. This is very rare in Dirac semi-metals, but is expected in clean conventional metallic superconductors with 3D parabolic dispersion relation. The conduction bands in this material exhibit the linear (Dirac) dispersion only along two directions, while in the third direction the dispersion is parabolic. Therefore the 'hybrid' Dirac-parabolic material is intermediate between the two extremes. A microscopic pairing theory is derived for arbitrary tilt parameter of the 2D cone and used to determine anisotropic coherence lengths, the penetration depths and applied to recent extensive experiments. Magnetic properties of these superconductors are then studied in the parallel to the layers magnetic field on the basis of microscopically derived Ginzburg-Landau effective theory for the order parameter.
URI: http://dx.doi.org/10.1088/1361-648X/aad305
http://hdl.handle.net/11536/147923
ISSN: 0953-8984
DOI: 10.1088/1361-648X/aad305
期刊: JOURNAL OF PHYSICS-CONDENSED MATTER
Volume: 30
Appears in Collections:Articles