Electron-hole overlap dictates the hole spin relaxation rate in nanocrystal heterostructures

Jun He, Haizheng Zhong, Gregory D. Scholes

Research output: Contribution to journalArticle

45 Scopus citations

Abstract

Hole spin relaxation dynamics in CdTe/CdSe core-shell nanocrystals are measured by an ultrafast polarization transient grating technique. Photoexcited charge separation in type II structures suppresses the electron-hole exchange interaction and the hole spin relaxation time constant is found to increase from ∼0.3ps to ∼10ps at 293 K as the CdSe shell thickness increases from ∼0.2nm to ∼2.4nm. Analysis of these data suggests that spin relaxation in semiconductor nanostructures is tunable between type I and type II localization according to an electron-hole overlap function.

Original languageEnglish (US)
Article number046601
JournalPhysical review letters
Volume105
Issue number4
DOIs
StatePublished - Jul 21 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Electron-hole overlap dictates the hole spin relaxation rate in nanocrystal heterostructures'. Together they form a unique fingerprint.

  • Cite this