Browsing by Author "Xu, W"

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Electron-electron scattering times in low-diffusivity thick RuO2 and IrO2 films
(1999-01-01)
Lin, JJ
;
Xu, W
;
Zhong, YL
;
Huang, JH
;
Huang, YS
We have systematically measured the electron dephasing scattering times from a three-dimensional weak-localization study of low-diffusivity thick RuO2 and IrO2 films. We find that the inelastic electron scattering rate 1/tau(in) varies essentially Linearly with the temperature and there is essentially no dependence of 1/tau(in) on the electron elastic mean free path. This observation is understood in terms of the current theoretical concept for electron-electron scattering in strongly disordered bulk conductors. [S0163-1829(99)02601-6].
Energy levels of a parabolically confined quantum dot in the presence of spin-orbit interaction
(2004-06-01)
Kuan, WH
;
Tang, CS
;
Xu, W
;
電子物理學系
;
Department of Electrophysics
We present a theoretical study of the energy levels in a parabolically confined quantum dot in the presence of the Rashba spin-orbit interaction (SOI). The features of some low-lying states in various strengths of the SOI are examined at zero and nonzero magnetic fields. It is shown that the spin-polarized electronic states can be more easily achieved in a weakly confined dot when SOI is greater than a critical value of the confinement strength. The presence of a magnetic field enhances the possibility of the spin polarization and the SOI leads to different energy dependence on magnetic fields applied. Furthermore, in high magnetic fields, the spectra of low-lying states show basic features of Fock-Darwin levels as well as Landau levels. (C) 2004 American Institute of Physics.