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Quasiclassical theory of twin boundaries in high-T-c superconductors

Belzig, W. and Bruder, C. and Sigrist, M.. (1998) Quasiclassical theory of twin boundaries in high-T-c superconductors. Physical review letters, Vol. 80, H. 19. pp. 4285-4288.

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Official URL: http://edoc.unibas.ch/dok/A5252861

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Abstract

We investigate the electronic structure of twin boundaries in orthorhombically distorted high-T-c, materials using the quasiclassical theory of superconductivity. At low temperatures we find a local instability to a time-reversal symmetry breaking state at the twin boundary. This state yields spontaneous currents along the twin boundary that are microscopically explained by the structure of the quasiparticle bound states. We calculate the local density of states and find a splitting in the zero-bias peak once the spontaneous currents set in. This splitting is measurable by STM techniques and is a unique signature of time-reversal breaking states at a twin boundary.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik (Bruder)
UniBasel Contributors:Bruder, Christoph
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:American Physical Society
ISSN:0031-9007
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:22 Mar 2012 14:26
Deposited On:22 Mar 2012 13:52

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