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24 April 2024

» arxiv » cond-mat/0207662

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Magnetoresistance of a 2D electron gas caused by electron interactions in the transition from the diffusive to the ballistic regime
L. Li ; Y.Y. Proskuryakov ; A.K. Savchenko ; E.H. Linfield ; D.A. Ritchie ;
Date:	27 Jul 2002
Subject:	Mesoscopic Systems and Quantum Hall Effect; Strongly Correlated Electrons \| cond-mat.mes-hall cond-mat.str-el
Abstract:	On a high-mobility 2D electron gas we have observed, in strong magnetic fields (omega_{c} tau > 1), a parabolic negative magnetoresistance caused by electron-electron interactions in the regime of k_{B} T tau / hbar ~ 1, which is the transition from the diffusive to the ballistic regime. From the temperature dependence of this magnetoresistance the interaction correction to the conductivity delta sigma_{xx}^{ee}(T) is obtained in the situation of a long-range fluctuation potential and strong magnetic field. The results are compared with predictions of the new theory of interaction-induced magnetoresistance.
Source:	arXiv, cond-mat/0207662
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