Magneto-optical studies of HgTe/HgxCdl-xTe(S) core-shell nanocrystals

被引：18

作者：

Fradkin, L

Langof, L

Lifshitz, E ^{[1
]}

Rogach, A

Gaponik, N

Weller, H

Eychmüller, A

机构：

[1] Technion Israel Inst Technol, Dept Chem, IL-32000 Haifa, Israel

[2] Technion Israel Inst Technol, Inst Solid State, IL-32000 Haifa, Israel

[3] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[4] Univ Munich, Dept Phys, D-80799 Munich, Germany

[5] Univ Hamburg, Inst Phys Chem, D-20146 Hamburg, Germany

来源：

CHEMPHYSCHEM | 2003年 / 4卷 / 11期

关键词：

alloys; core-shell nanocrystals; magneto-optical properties; ODMR (optical detection of magnetic resonance);

D O I：

10.1002/cphc.200300809

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The synthesis and magneto-optical properties of HgTe nanocrystals capped with HgxCd1-xTe(S) alloyed shells have been investigated The magneto-optical measurements included the use of optically detected magnetic resonance (ODMR) and circular polarized photoluminescence (CP-PL) spectroscopy. The PL spectra suggest the existence of luminescence events from both the core HgTe and the HgxCd1-xTe(S) shells. The continuous-wave (cw) and time-resolved ODMR measurements revealed that the luminescence at the shell regime is associated with a trap-to-band recombination emission. The. electron trap is comprised of a Cd-Hg mixed site, confirming the existence of an alloyed HgxCd1-xTe(S) composition. The ODMR data and the CP-PL measurements together revealed the g-values of the trapped electron and the valence bond hole.

引用

页码：1203 / 1210

页数：8

共 35 条

[1]

Bajaj J, 1998, P SOC PHOTO-OPT INS, V3316, P1297

[2]

BRICE J, 1987, EMIS DATA REV SERIES, V3

[3] OPTICALLY DETECTED MAGNETIC-RESONANCE OF STRONGLY COUPLED DONOR-ACCEPTOR PAIRS IN ZNS [J].

DAVIES, JJ ;

NICHOLLS, JE .

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS, 1982, 15 (25) :5321-5331

[4] CDTE-HGTE MULTILAYERS GROWN BY MOLECULAR-BEAM EPITAXY [J].

FAURIE, JP ;

MILLION, A ;

PIAGUET, J .

APPLIED PHYSICS LETTERS, 1982, 41 (08) :713-715

[5]

FRADKIN L, 2001, MRS BOST, V692

[6]

France P.W., 1991, OPTICAL FIBRE LASERS

[7] Electron (hole) paramagnetic resonance of spherical CdSe nanocrystals [J].

Gokhberg, K ;

Glozman, A ;

Lifshitz, E ;

Maniv, T ;

Schlamp, MC ;

Alivisatos, P .

JOURNAL OF CHEMICAL PHYSICS, 2002, 117 (06) :2909-2913

[8] Spin dynamics in semiconductor nanocrystals [J].

Gupta, JA ;

Awschalom, DD ;

Efros, AL ;

Rodina, AV .

PHYSICAL REVIEW B, 2002, 66 (12) :1253071-12530712

[9]

Harrison M.T., 1999, J. Mater. Chem, V9, P2721

[10]

Harrison MT, 2000, ADV MATER, V12, P123, DOI 10.1002/(SICI)1521-4095(200001)12:2<123::AID-ADMA123>3.0.CO

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