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24 April 2024

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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:	21 Feb 2003
Journal:	Phys Rev Lett, 90 (7), 076802
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)Ttau/ variant Planck’s over 2pi approximately 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 deltasigma(ee)(xx)(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:	PubMed, pmid12633258
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