Schreiber, L. R. and Braakman, F. R. and Meunier, T. and Calado, V. and Danon, J. and Taylor, J. M. and Wegscheider, W. and Vandersypen, L. M. K. (2011) Coupling artificial molecular spin states by photon-assisted tunnelling. NATURE COMMUNICATIONS, 2: 556. ISSN 2041-1723,
Full text not available from this repository. (Request a copy)Abstract
Artificial molecules containing just one or two electrons provide a powerful platform for studies of orbital and spin quantum dynamics in nanoscale devices. A well-known example of these dynamics is tunnelling of electrons between two coupled quantum dots triggered by microwave irradiation. So far, these tunnelling processes have been treated as electric-dipole-allowed spin-conserving events. Here we report that microwaves can also excite tunnelling transitions between states with different spin. We show that the dominant mechanism responsible for violation of spin conservation is the spin-orbit interaction. These transitions make it possible to perform detailed microwave spectroscopy of the molecular spin states of an artificial hydrogen molecule and open up the possibility of realizing full quantum control of a two-spin system through microwave excitation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SINGLE-ELECTRON SPIN; DOUBLE-QUANTUM DOT; FIELD; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Werner Wegscheider |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 May 2020 06:34 |
| Last Modified: | 27 May 2020 06:34 |
| URI: | https://pred.uni-regensburg.de/id/eprint/19846 |
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