Conductance and thermopower in quantum point contact: effect of magnetic field and temperature

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Abstract
We calculate the conductance and thermopower in saddle quantum point contact under a finite temperature and different magnetic fields. The steplike conductance becomes flatter and the length between the peaks of the thermopower becomes longer with increasing magnetic field. The quantization of the conductance is destroyed and the peak structure of the thermopower disapears when the temperature becomes higher.

Keywords:
quantum point contact /

quantization conductance /

thermopower /

magnetic field
Authors and contacts
Li Yu-Xian³,

Liu Jian-Jun¹,

Li Bo-Zang²

(1)河北师范大学物理学院，石家庄050016; (2)中国科学院物理研究所,北京100080; (3)中国科学院物理研究所,北京100080;河北师范大学物理学院，石家庄050016
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