We study the nuclear quadrupolar interaction using a resistively-detected NMR device. The nuclear spins are dynamically polarized in a sub-micron scale region defined by split gates. In pulsed NMR spectra for 69Ga and 75As nuclei, three distinct peaks are observed. The peak splitting depends on the electric quadrupolar coupling constant EQ. By comparing the spectra of both nuclei, we find that the relative peak intensity is opposite, which is independent of the condition for the dynamic nuclear spin polarization. This result indicates that the electric-field gradient in E Q has opposite sign at 69Ga and 75As nuclear site.
|Number of pages||4|
|Journal||Physica Status Solidi (C) Current Topics in Solid State Physics|
|Publication status||Published - 2007 Dec 1|
|Event||33rd International Symposium on Compound Semiconductors, ISCS-2006 - Vancouver, BC, Canada|
Duration: 2006 Aug 13 → 2006 Aug 17
ASJC Scopus subject areas
- Condensed Matter Physics