Optical spectra of CdMnSe of nano-ferro- and antiferro-magnets

被引：12

作者：

Proshchenko, Vitaly ^{[1
]}

Dahnovsky, Yuri ^{[1
]}

机构：

[1] Univ Wyoming, Dept Phys & Astron, Laramie, WY 82071 USA

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2015年 / 17卷 / 40期

关键词：

CDSE QUANTUM DOTS; COLLOIDAL METAL SULFIDES; AB-INITIO; SEMICONDUCTOR CLUSTERS; SURFACE LIGANDS; POROUS SILICON; TIME-DOMAIN; PBSE; NANOCRYSTALS; LUMINESCENCE;

D O I：

10.1039/c5cp02457a

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：

We study optical transitions in CdSe quantum dots doped by Mn atoms. At low concentrations the transitions are spin-forbidden. Nevertheless, strong light absorption was experimentally found. To explain this effect we propose a new mechanism that includes two or more Mn atoms closely placed to each other containing the electrons with opposite spin projections. In this case the spin-flip is unnecessary. In addition we study absorption from quantum dots containing two Mn atoms with different multiplicities. We find that the strongest absorption from the gap is for an antiferromagnetic arrangement. The obtained results confirm the experimental concentration dependencies.

引用

页码：26828 / 26832

页数：5

共 37 条

[21] IR spectra of nano- and macro-crystals: the overriding importance of optical path
Hofmeister, AM
Rosen, LJ
Speck, AK
THERMAL EMISSION SPECTROSCOPY AND ANALYSIS OF DUST, DISKS, AND REGOLITHS, 2000, 196 : 291 - 299
[22] Itinerant antiferro- and ferro-magnetic instability in Re-doped URu2Si2: Optical and point-contact spectroscopy results (vol 32, pg 367, 1995)
Thieme, S
Steiner, P
Degiorgi, L
Wachter, P
Dalichaouch, Y
Maple, MB
EUROPHYSICS LETTERS, 1995, 32 (09): : 783 - 783
[23] RELATIONSHIP OF THE INHOMOGENEOUS BROADENINGS IN THE TRIPLET-STATE OPTICAL AND ODMR SPECTRA OF NANO2-AG+
CLARK, SE
TINTI, DS
CHEMICAL PHYSICS, 1980, 51 (1-2) : 17 - 30
[24] OPTICAL STUDY OF THE TRIPLET-STATE IN NANO2 CRYSTALS - EXCITONIC ASPECTS OF PHOSPHORESCENCE SPECTRA
OHTA, O
KATO, R
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1995, 64 (11) : 4461 - 4472
[25] Optical spectra of conjugated gold nano-colloids; Scattering cross section and effects of solvent and polydispersity
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RESULTS IN CHEMISTRY, 2025, 13
[26] Controlling the optical spectra of gold nano-islands by changing the aspect ratio and the inter-islands distance: Theory and Experiment
Strelniker, Yakov M.
Fleger, Yafit
Rosenbluh, Michael
Bergman, David J.
PLASMONICS: METALLIC NANOSTRUCTURES AND THEIR OPTICAL PROPERTIES VIII, 2010, 7757
[27] Controlling the optical spectra of gold nano-islands by changing the aspect ratio and the inter-island distance: theory and experiment
Fleger, Y.
Rosenbluh, M.
Strelniker, Y. M.
Bergman, D. J.
Lagarkov, A. N.
EUROPEAN PHYSICAL JOURNAL B, 2011, 81 (01): : 85 - 93
[28] Controlling the optical spectra of gold nano-islands by changing the aspect ratio and the inter-island distance: theory and experiment
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M. Rosenbluh
Y. M. Strelniker
D. J. Bergman
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[29] Optical characterization and thickness estimation of Al3+ ion doped ZnO nano-films from transmittance spectra
Madhup, D. K.
Subedi, D. P.
Chimouriy, S. P.
JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 2010, 12 (05): : 1035 - 1044
[30] Simulations on effects of granular morphology on single-electron and optical spectra of nano- and micro-crystalline AlN and diamond
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Ong, K. P.
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