標題: | The Vortex Core Excitation Spectrum in Gapped Topological d-wave Superconductors |
作者: | Rosenstein, Baruch Shapiro, Irina Shapiro, Boris Y. 電子物理學系 Department of Electrophysics |
關鍵字: | Chiral d-wave superconductor;Vortex core excitations;Heat transport |
公開日期: | 1-十二月-2013 |
摘要: | There are indications that some high temperature unconventional superconductors have a "complex" d-wave order parameter (with an admixture of s-wave) leading to nonzero energy gap. Since the coherence length is short and the Fermi energy is relatively small the quasiclassical approach is inapplicable and the more complicated Bogoliubov-deGennes equations should be used to investigate the excitation spectrum of such a material in a magneric field. It turns out that equations for the chiral d-wave superconductor simplify considerably and is the basis for any superconductor of that type with a sufficiently large gap. The spectrum of core excitations of the Abrikosov vortex in an anisotropic 3D sample exhibits several features. Unlike in conventional and gapless superconductors the core has a single excitation mode of order energetic gap for each value of momentum along the field. This has a large impact on thermal transport and vortex dynamics. |
URI: | http://dx.doi.org/10.1007/s10909-013-0901-y http://hdl.handle.net/11536/22927 |
ISSN: | 0022-2291 |
DOI: | 10.1007/s10909-013-0901-y |
期刊: | JOURNAL OF LOW TEMPERATURE PHYSICS |
Volume: | 173 |
Issue: | 5-6 |
起始頁: | 289 |
結束頁: | 302 |
顯示於類別: | 期刊論文 |