Quantum corrections to the electrical conduction of magnetic semiconductors are comparatively unexplored. We report measurements of time-dependent universal conductance fluctuations (TDUCF) and magnetic field dependent universal conductance fluctuations (MFUCF) in micron-scale structures fabricated from two different In1−xMnxAs thin films. TDUCF and MFUCF increasing in magnitude with decreasing temperature are observed. At 4 K and below, TDUCF are suppressed at finite magnetic fields independent of field orientation.
@article{arxiv.cond-mat/0608036,
title = {Mesoscopic conductance effects in InMnAs structures},
author = {S. Lee and A. Trionfi and T. Schallenberg and H. Munekata and D. Natelson},
journal= {arXiv preprint arXiv:cond-mat/0608036},
year = {2007}
}
Comments
5 pages, 3+2 figures, 1 table; Appl. Phys. Lett. (in press)