Nuclear-spin observation of noise spectra in semiconductors

Susumu Sasaki, Tatsuro Yuge, Masashi Nishimori, Takashi Kawanago, Yoshiro Hirayama

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We propose a systematic method of obtaining the spectra of noises that cause the decoherence of spins in solids. Based on this method, we experimentally show that this method can be applied to nuclear spins in semiconductors. We clarify that the spectral intensity must be derived from the long-time tail of the multiple-echo decay. To obtain higher-frequency noise, the inversion-pulse interval must be as short as possible, which required us to employ the alternating-phase Carr-Purcell sequence instead of the widely used Carr-Purcell Meiboom-Gill. For 75As nuclear spin in variously-doped GaAs, we observed a Lorentzian spectrum, instead of the commonly observed 1/f spectrum. This indicates that the nuclear spins are indeed in a coherently-controlled state.

Original languageEnglish
Title of host publicationPhysics of Semiconductors - Proceedings of the 31st International Conference on the Physics of Semiconductors, ICPS 2012
PublisherAmerican Institute of Physics Inc.
Number of pages2
ISBN (Print)9780735411944
Publication statusPublished - 2013 Jan 1
Event31st International Conference on the Physics of Semiconductors, ICPS 2012 - Zurich, Switzerland
Duration: 2012 Jul 292012 Aug 3

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Other31st International Conference on the Physics of Semiconductors, ICPS 2012


  • low-frequency noise
  • multiple pulse
  • nuclear spin

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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