Forster, F. and Muehlbacher, M. and Schuh, D. and Wegscheider, W. and Ludwig, S. (2015) Electric-dipole-induced spin resonance in a lateral double quantum dot incorporating two single-domain nanomagnets. PHYSICAL REVIEW B, 91 (19): 195417. ISSN 1098-0121, 1550-235X
Full text not available from this repository. (Request a copy)Abstract
On-chip magnets can be used to implement relatively large local magnetic field gradients in nanoelectronic circuits. Such field gradients provide possibilities for all-electrical control of electron spin qubits where important coupling constants depend crucially on the detailed field distribution. We present a double quantum dot (QD) hybrid device laterally defined in a GaAs/AlGaAs heterostructure which incorporates two single-domain nanomagnets. They have appreciably different coercive fields which allows us to realize four distinct configurations of the local inhomogeneous field distribution. We perform dc transport spectroscopy in the Pauli-spin blockade regime as well as electric-dipole-induced spin resonance (EDSR) measurements to explore our hybrid nanodevice. Characterizing the two nanomagnets we find excellent agreement with numerical simulations. By comparing the EDSR measurements with a second double QD incorporating just one nanomagnet we reveal an important advantage of having one magnet per QD: It facilitates strong field gradients in each QD and allows us to control the electron spins individually for instance in an EDSR experiment. With just one single-domain nanomagnet and common QD geometries EDSR can likely be performed only in one QD.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COHERENT CONTROL; OSCILLATIONS; COMPUTATION; QUBIT; FIELD; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Huber > Group Rupert Huber |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 15 Jul 2019 09:04 |
| Last Modified: | 15 Jul 2019 09:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/5503 |
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