Optically detected magnetic resonance study of core-shell and alloy nanocrystals of HgTe and CdS

Research output: Journal Publications and Reviews › RGC 22 - Publication in policy or professional journal

View graph of relations

Author(s)

  • L. Fradkin
  • L. Langof
  • E. Lifshitz
  • N. Gaponik
  • H. Weller
  • A. Eychmüller

Detail(s)

Original languageEnglish
Pages (from-to)289-294
Journal / PublicationMaterials Research Society Symposium - Proceedings
Volume692
Publication statusPublished - 2002
Externally publishedYes

Conference

TitleProgress in Semiconductor Materials for Optoelectronic Applications
PlaceUnited States
CityBoston, MA
Period26 - 29 November 2001

Link(s)

DOI

DOI
Check@CityULib
Link to Scopus https://www.scopus.com/record/display.uri?eid=2-s2.0-0036061411&origin=recordpage
Permanent Link https://scholars.cityu.edu.hk/en/publications/publication(0be7bc72-47de-421d-853a-5af7f90e87f4).html

Abstract

The synthesis of HgTe nanocrystals (NCs), coated with a CdS shell, presumably results in the formation of HgTe/CdS, HgTe/CdHgS core-shell structures or separated CdHgS alloys. Photoluminescence (PL), continuous-wave (cw) and time-resolved optically detected magnetic resonance (ODMR) spectroscopy examined the magneto-optical properties of the dominating resonance aforementioned products. The cw ODMR measurements indicated that the NCs exhibit a band, centered at 0.39 Tesla, corresponding to an excited state electron (e) and hole (h) spin manifold, with total angular momentum (F=S+L) Fe=1/2 and Fh=3/2, respectively. Theoretical simulation of the ODMR band revealed an anisotropy of the g-factor, indicating the existence of trapped carriers' at a mixed Cd-Hg tetrahedral site, confirming the formation of an alloy component. The time-resolved ODMR measurements reveal a characteristic radiative decay time and spin-lattice relaxation time of these trapped carriers of hundreds of microseconds.

Fingerprint

Publication fingerprints text

100
nanocrystals INIS
100
cadmium sulfides INIS
100
alloys INIS
100
shells INIS
100
magnetic resonance INIS
100
mercury tellurides INIS
100
Alloy Engineering
100
Nanocrystal Engineering
100
Core-Shell Engineering
100
HgTe Keyphrases
Full Fingerprint ›

Citation Format(s)

[ RIS ] [ BibTeX ]
Optically detected magnetic resonance study of core-shell and alloy nanocrystals of HgTe and CdS. / Fradkin, L.; Langof, L.; Lifshitz, E. et al.
In: Materials Research Society Symposium - Proceedings, Vol. 692, 2002, p. 289-294.

Research output: Journal Publications and Reviews › RGC 22 - Publication in policy or professional journal