Phys. Rev. B 67, 115313 (2003) [5 pages]Crossover from weak localization to weak antilocalization in a disordered microbridge |
M. G. A. Crawford and P. W. Brouwer
Laboratory of Atomic and Solid State Physics, Cornell University, Ithaca, New York 14853-2501
C. W. J. Beenakker
Instituut-Lorentz, Leiden University, P.O. Box 9506, 2300 RA Leiden, The Netherlands
Received 18 September 2002; published 17 March 2003
We calculate the weak localization correction in the double crossover to broken time-reversal and spin-rotational symmetry for a disordered microbridge or a short disordered wire using a scattering-matrix approach. Whereas the correction has universal limiting values in the three basic symmetry classes, the functional form of the magnetoconductance is affected by eventual nonhomogeneities in the microbridge.
©2003 The American Physical Society
URL: http://link.aps.org/abstract/PRB/v67/e115313
DOI: 10.1103/PhysRevB.67.115313
PACS: 73.20.Fz, 73.21.Hb, 73.23.-b, 73.43.Qt
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