Half vortices in exciton polariton condensates

It is shown that vortices in linearly polarized polariton condensates in planar semiconductor microcavities carry two winding numbers (k, m). These numbers can be either integer or half-integer simultaneously. Four half-integer vortices (1/2, 1/2), (-1/2, -1/2), (1/2, -1/2), and (-1/2, 1/2) are anis...

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Bibliographic Details
Published in:Physical review letters 2007-09, Vol.99 (10), p.106401-106401, Article 106401
Main Author: Rubo, Yuri G
Format: Article
Language:English
Subjects:
ANISOTROPY
CONDENSATES
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
EXCITONS
POLARIZATION
SEMICONDUCTOR MATERIALS
TRANSITION TEMPERATURE
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Summary:It is shown that vortices in linearly polarized polariton condensates in planar semiconductor microcavities carry two winding numbers (k, m). These numbers can be either integer or half-integer simultaneously. Four half-integer vortices (1/2, 1/2), (-1/2, -1/2), (1/2, -1/2), and (-1/2, 1/2) are anisotropic, possess the smallest energy, and define the Kosterlitz-Thouless transition temperature. The condensate concentration remains finite within the core of the half vortex and the condensate polarization becomes fully circular in the core center.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.99.106401