Open AccessConductance and thermopower in quantum point contact: effect of magnetic field and temperature
Author(s) -
Yuxian Li,
Jianjun Liu,
Bo-Zang Li
Publication year - 2005
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.54.1366
Subject(s) - condensed matter physics , seebeck coefficient , conductance , magnetic field , conductance quantum , quantization (signal processing) , quantum point contact , saddle point , physics , saddle , materials science , quantum , electrical resistivity and conductivity , quantum mechanics , quantum well , mathematical optimization , laser , geometry , mathematics , computer science , computer vision
We calculate the conductance and thermopower in saddle quantum point contact under a finite temperature and different magnetic fields. The steplike 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.