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arxiv: cond-mat/0309619 · v2 · pith:ODQZVTZKnew · submitted 2003-09-26 · ❄️ cond-mat.str-el

Negative differential conductance induced by spin-charge separation

classification ❄️ cond-mat.str-el
keywords spin-chargeconductancedifferentialinducednegativeseparationstatesassociated
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Spin-charge states of correlated electrons in a one-dimensional quantum dot attached to interacting leads are studied in the non-linear transport regime. With non-symmetric tunnel barriers, regions of negative differential conductance induced by spin-charge separation are found. They are due to a correlation-induced trapping of higher-spin states without magnetic field, and associated with a strong increase in the fluctuations of the electron spin.

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