Volume 88, Number 4, November 2009
Article Number 47007
Number of page(s) 5
Section Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties
Published online 02 December 2009
EPL, 88 (2009) 47007
DOI: 10.1209/0295-5075/88/47007

Magnetic-field asymmetry of nonlinear transport in a small ring

G. M. Gusev1, Z. D. Kvon1, E. B. Olshanetsky2 and A. Y. Plotnikov2

1   Instituto de Física da Universidade de São Paulo - CP 66318 CEP 05315-970, São Paulo, SP, Brazil
2   Institute of Semiconductor Physics - Novosibirsk 630090, Russia

received 23 August 2009; accepted in final form 5 November 2009; published November 2009
published online 2 December 2009

We have investigated the magnetic-field asymmetry of the conductance in the nonlinear regime in a small Aharonov-Bohm ring. We have found that the odd-in B and linear in V (the DC bias) correlation function of the differential conductance exhibits periodical oscillations with the Aharonov-Bohm flux. We have deduced the electron interaction constant and analyzed the phase rigidity of the Aharonov-Bohm oscillations in the nonlinear regime.

73.23.-b - Electronic transport in mesoscopic systems.
73.63.-b - Electronic transport in nanoscale materials and structures.

© EPLA 2009