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arXiv · cond-mat/0703323

0.4 and 0.7 conductance anomalies in quantum point contacts

A. M. Bychkov·T. M. Stace
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Abstract

Self-consistent modelling based on local spin-density formalism is employed to calculate conductance of quantum point contacts at finite temperatures. The total electrostatic potential exhibits spin-dependent splitting, which persists at temperatures up to 0.5 K and gives rise to the anomalies at 0.4 and 0.7 of the conductance quantum $2e^2/h$ occurring simultaneously in the absence of external magnetic fields.

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A. M. Bychkov, T. M. Stace. 2007-04-16. 0.4 and 0.7 conductance anomalies in quantum point contacts. https://doi.org/10.1088/0957-4484%2F18%2F18%2F185403

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