Mechanisms for extra conductance plateaus in quantum wires
Abstract
Spin-density-functional theory is employed to calculate the conductance G through a quasi-one-dimensional quantum wire. In addition to the usual subband quantization plateaus at G=n(2e2/h), we find additional structures at (n+1/2)(2e2/h). The extra structures appear whether or not the electrons in the wire spin polarize. However, only the spin-polarized case reproduces the experimental temperature and magnetic field dependences.
- Publication:
-
Physical Review B
- Pub Date:
- January 2001
- DOI:
- 10.1103/PhysRevB.63.033315
- Bibcode:
- 2001PhRvB..63c3315H
- Keywords:
-
- 73.61.-r;
- 71.15.Mb;
- 71.70.Ej;
- Electrical properties of specific thin films;
- Density functional theory local density approximation gradient and other corrections;
- Spin-orbit coupling Zeeman and Stark splitting Jahn-Teller effect