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 | Nanotech 2004 Vol. 3
Technical Proceedings of the 2004 NSTI Nanotechnology Conference and Trade Show, Volume 3
Chapter 2: Nanoscale Electronics and Quantum Devices |
| | Spin-orbit Interaction and Energy States in Nanoscale Semiconductor Quantum Rings | | Authors: | Y. Li | | Affilation: | Natl Nano Device Labs & Natl Chiao Tung Univ, TW | | Pages: | 53 - 56 | | Keywords: | spin-orbit splitting, energy states, InAs/GaAs, quantum ring, quantum dot | | Abstract: | We investigate the effect of spin-orbit interaction on the electron energy states in nanoscale semiconductor quantum rings. The effective one-band Hamiltonian approximation with the spin-dependent Ben Daniel-Duke boundary conditions is formulated and solved numerically. Due to significant spin-orbit interaction in the nonsimply connected torus topology, experimentally measurable spin splitting can be observed in InAs/GaAs quantum ring. The spin splitting depends on the variations of geometric (dot- and ring-liked) structures. They are dominated by the inner radius, base radius, and height of the quantum ring. Under zero magnetic fields, it is found that quantum ring can produce ~ 2 meV spin splitting of excited electronic states which is substantially larger than that of quantum dot (~ 1meV). | | ISBN: | 0-9728422-9-2 |
| Pages: | 561 |
| Hardcopy: | $150.00 |
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