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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Defect-induced magnetism in II-VI quantum dots

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Author(s):
Lima, Matheus P. [1] ; Cabral, L. [1] ; Margapoti, Emanuela [1] ; Mahapatra, Suddhasatta [2] ; Da Silva, Juarez L. F. [3] ; Hartmann, Fabian [4, 5] ; Hoefling, Sven [6, 4, 5] ; Marques, Gilmar E. [1] ; Lopez-Richard, Victor [1]
Total Authors: 9
Affiliation:
[1] Univ Fed Sao Carlos, Dept Fis, BR-13565905 Sao Carlos, SP - Brazil
[2] Indian Inst Technol, Dept Phys, Bombay 400076, Maharashtra - India
[3] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[4] Univ Wurzburg, Phys Inst, Tech Phys, D-97074 Wurzburg - Germany
[5] Univ Wurzburg, Rontgen Ctr Complex Mat Syst RCCM, D-97074 Wurzburg - Germany
[6] Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife - Scotland
Total Affiliations: 6
Document type: Journal article
Source: Physical Review B; v. 99, n. 1 JAN 22 2019.
Web of Science Citations: 0
Abstract

The identification of physical parameters that lead to magnetism in apparent nonmagnetic semiconductor systems has continuously challenged our community. In particular, for quantum-dot systems, they are key factors that contribute to their magneto-optical properties. We report, experimentally, optical evidences of induced nanomagnetism in nonmagnetic CdSe quantum dots and assess theoretically the role played by charged and uncharged vacancies. The analysis of these effects rests upon both the chemical and strain environments where the quantum dots are embedded. The interplay of spin-orbit interaction with built-in axial strains has been demonstrated to be a key factor for the magnetic moment alignment. This has been achieved in this paper by emulating the electronic structure at atomistic levels, considering various defect configurations and taking into account both the quantum dot composition and the influence of the host lattice. (AU)

FAPESP's process: 14/02112-3 - Optical and transport phenomena in nano-devices
Grantee:Victor Lopez Richard
Support Opportunities: Regular Research Grants
FAPESP's process: 14/19142-2 - Characterization and processing of semiconductor nanostructures and application as devices
Grantee:Gilmar Eugenio Marques
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 17/11631-2 - CINE: computational materials design based on atomistic simulations, meso-scale, multi-physics, and artificial intelligence for energy applications
Grantee:Juarez Lopes Ferreira da Silva
Support Opportunities: Research Grants - Research Centers in Engineering Program