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Towards a microscopic theory of the 0.7 anomaly

✍ Scribed by Y. Tokura; A. Khaetskii

Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
88 KB
Volume
12
Category
Article
ISSN
1386-9477

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✦ Synopsis

A microscopic mechanism for the so-called 0.7 anomaly is proposed. The exchange interactions in a constriction develop electron spin uctuations with decreasing carrier density. For non-adiabatic transmission, this spin uctuation causes additional electron backscattering. The position of the anomaly and its shape are explained by the energy dependence of the transmission probability through the static potential. The temperature dependence is also given by our model.

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