The phenomenology of the "0.7 anomaly" in quantum point contacts is fully explained in terms of a quasi-localized state, which forms as the point contact opens up. Detailed numerical calculations within spin-density functional theory indeed con rm the emergence of such a state. Quantitative calculations of the conductance and the noise are obtained using a model based on these observations, and are in excellent agreement with existing experimental observations.
@article{arxiv.0710.3307,
title = {The theory of the "0.7 anomaly" in quantum point contacts},
author = {Yigal Meir},
journal= {arXiv preprint arXiv:0710.3307},
year = {2009}
}
Comments
A summary paper, to be included in JPCM Special Issue on 0.7 Feature