Decoherence of nuclear spins due to dipole-dipole interactions probed by resistively detected nuclear magnetic resonance

T. Ota, Go Yusa, N. Kumada, S. Miyashita, T. Fujisawa, Yoshiro Hirayama

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

We study decoherence of nuclear spins in a GaAs quantum well structure using resistively detected nuclear magnetic resonance. The transverse decoherence time T2 of As75 nuclei is estimated from Rabi-type coherent oscillations as well as by using spin-echo techniques. By analyzing T2 obtained by decoupling techniques, we extract the role of dipole-dipole interactions as sources of decoherence in GaAs. Under the condition that the device is tilted in an external magnetic field, we exhibit enhanced decoherence induced by the change in strength of the direct dipole-dipole interactions between first nearest-neighbor nuclei. The results agree well with simple numerical calculations.

Original languageEnglish
Article number193101
JournalApplied Physics Letters
Volume91
Issue number19
DOIs
Publication statusPublished - 2007 Nov 19

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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