Structure of the core of magnetic vortices in d-wave superconductors with a subdominant triplet pairing mechanism

被引:9
作者
Fogelstrom, Mikael [1 ]
机构
[1] Chalmers, Dept Microtechnol & Nanosci, S-41296 Gothenburg, Sweden
来源
PHYSICAL REVIEW B | 2011年 / 84卷 / 06期
关键词
CONSISTENT ELECTRONIC-STRUCTURE; DENSITY-OF-STATES; VORTEX CORES; TUNNELING SPECTROSCOPY; II SUPERCONDUCTOR; SUPERFLUID HE-3; LINE; BI2SR2CACU2O8+DELTA; LATTICE;
D O I
10.1103/PhysRevB.84.064530
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The quasiparticle states found in the vortex core of a high-T-c cuprate superconductor may be probed by scanning tunneling spectroscopy. Results of such experiments have revealed typical spectra that are quite different from what is seen in conventional low-T-c superconductors. In particular, the Caroli-de Gennes-Matricon state at E similar to 0 in the core center is not seen. Instead, in a high-T-c vortex core, quasiparticle states are found at energies that are at a sizable fraction of the gap energy. One explanation for this could be that a finite amplitude of a competing order parameter stabilizes in the vortex-core center. Here I will explore the possibility of nucleating a vortex-core state that locally breaks inversion symmetry. The vortex-core order parameter is of mixed parity, a [d + ip] wave, and the quasiparticle spectra in the core center lacks the E = 0 states.
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页数:6
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