Petersen, Gunnar and Hoffmann, Eric A. and Schuh, Dieter and Wegscheider, Werner and Giedke, Geza and Ludwig, Stefan (2013) Large Nuclear Spin Polarization in Gate-Defined Quantum Dots Using a Single-Domain Nanomagnet. PHYSICAL REVIEW LETTERS, 110 (17): 177602. ISSN 0031-9007,
Full text not available from this repository. (Request a copy)Abstract
The electron-nuclei (hyperfine) interaction is central to spin qubits in solid state systems. It can be a severe decoherence source but also allows dynamic access to the nuclear spin states. We study a double quantum dot exposed to an on-chip single-domain nanomagnet and show that its inhomogeneous magnetic field crucially modifies the complex nuclear spin dynamics such that the Overhauser field tends to compensate external magnetic fields. This turns out to be beneficial for polarizing the nuclear spin ensemble. We reach a nuclear spin polarization of similar or equal to 50%, unrivaled in lateral dots, and explain our manipulation technique using a comprehensive rate equation model. DOI: 10.1103/PhysRevLett.110.177602
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FIELD; DECOHERENCE; RESONANCE; |
| 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: | 16 Apr 2020 07:57 |
| Last Modified: | 16 Apr 2020 07:57 |
| URI: | https://pred.uni-regensburg.de/id/eprint/16800 |
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