Spin-orbit effects on two-electron states in nanowhisker double quantum dots

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We investigate theoretically the combined effects of the electron-electron and the Rashba spin-orbit interactions on two electrons confined in quasi-one-dimensional semiconductor double quantum dots. We study both InSb-based structures, which are of interest due to their strong spin-orbit coupling,...

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Detalles Bibliográficos
Autor principal: Romano, C.L
Otros Autores: Tamborenea, P.I, Ulloa, S.E
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2009
Acceso en línea:Registro en Scopus
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Biblioteca Central Dr. Luis F. Leloir (FCEN) de Universidad de Buenos Aires
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030 |a PELNF 
100 1 |a Romano, C.L. 
245 1 0 |a Spin-orbit effects on two-electron states in nanowhisker double quantum dots 
260 |c 2009 
270 1 0 |m Tamborenea, P.I.; Department of Physics J.J. Giambiagi, University of Buenos Aires, Ciudad Universitaria, Pabellon I, C1428EHA Ciudad Autonoma de Buenos Aires, Argentina; email: pablot@df.uba.ar 
506 |2 openaire  |e Política editorial 
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520 3 |a We investigate theoretically the combined effects of the electron-electron and the Rashba spin-orbit interactions on two electrons confined in quasi-one-dimensional semiconductor double quantum dots. We study both InSb-based structures, which are of interest due to their strong spin-orbit coupling, and also InAs-based systems, which have been recently studied experimentally. We calculate the two-electron wave functions in the effective-mass approximation and explore the interplay between the two interactions on the energy levels and the spin of the states. The energy spectrum as a function of an applied magnetic field shows crossings and anticrossings between triplet and singlet states, associated with level mixing induced by the spin-orbit coupling. We find that the fields at which these crossings occur can be naturally controlled by the interdot barrier width, which controls the exchange integral in the structure. © 2009 Elsevier B.V. All rights reserved.  |l eng 
536 |a Detalles de la financiación: 0710581 
536 |a Detalles de la financiación: Secretaría de Ciencia y Técnica, Universidad de Buenos Aires, X179 
536 |a Detalles de la financiación: National Science Foundation 
536 |a Detalles de la financiación: Consejo Nacional de Investigaciones Científicas y Técnicas, PIP-5851 
536 |a Detalles de la financiación: We acknowledge useful discussions with C. Destefani, L. Meza-Montes, and Gustavo Murgida, as well as support from CONICET (PIP-5851), UBACyT (X179), and NSF (WMN Grant 0710581). PIT is a researcher of CONICET. 
593 |a Department of Physics J.J. Giambiagi, University of Buenos Aires, Ciudad Universitaria, Pabellon I, C1428EHA Ciudad Autonoma de Buenos Aires, Argentina 
593 |a Department of Physics and Astronomy, Nanoscale and Quantum Phenomena Institute, Ohio University, Athens, OH 45701-2979, United States 
690 1 0 |a ELECTRON INTERACTIONS 
690 1 0 |a NANOWHISKER 
690 1 0 |a QUANTUM DOTS 
690 1 0 |a RASHBA EFFECT 
690 1 0 |a SPIN-ORBIT COUPLING 
690 1 0 |a ANTICROSSINGS 
690 1 0 |a APPLIED MAGNETIC FIELDS 
690 1 0 |a BARRIER WIDTHS 
690 1 0 |a COMBINED EFFECT 
690 1 0 |a DOUBLE QUANTUM DOTS 
690 1 0 |a EFFECTIVE MASS APPROXIMATION 
690 1 0 |a ELECTRON INTERACTIONS 
690 1 0 |a ELECTRON STATE 
690 1 0 |a ELECTRON WAVE FUNCTIONS 
690 1 0 |a ENERGY LEVEL 
690 1 0 |a ENERGY SPECTRA 
690 1 0 |a EXCHANGE INTEGRALS 
690 1 0 |a INAS 
690 1 0 |a QUANTUM DOTS 
690 1 0 |a QUASI-ONE-DIMENSIONAL 
690 1 0 |a RASHBA EFFECT 
690 1 0 |a RASHBA SPIN ORBIT INTERACTION 
690 1 0 |a SINGLET STATE 
690 1 0 |a SPIN-ORBIT COUPLING 
690 1 0 |a SPIN-ORBIT COUPLINGS 
690 1 0 |a SPIN-ORBIT EFFECTS 
690 1 0 |a CRYSTAL WHISKERS 
690 1 0 |a CURRENT VOLTAGE CHARACTERISTICS 
690 1 0 |a ELECTRON ENERGY LEVELS 
690 1 0 |a ELECTRONS 
690 1 0 |a INDIUM ARSENIDE 
690 1 0 |a LITHIUM COMPOUNDS 
690 1 0 |a MAGNETIC FIELDS 
690 1 0 |a NANOWHISKERS 
690 1 0 |a ORBITS 
690 1 0 |a SPIN DYNAMICS 
690 1 0 |a SEMICONDUCTOR QUANTUM DOTS 
700 1 |a Tamborenea, P.I. 
700 1 |a Ulloa, S.E. 
773 0 |d 2009  |g v. 41  |h pp. 1577-1582  |k n. 8  |p Phys E  |x 13869477  |w (AR-BaUEN)CENRE-1776  |t Physica E: Low-Dimensional Systems and Nanostructures 
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856 4 0 |u https://doi.org/10.1016/j.physe.2009.04.039  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_13869477_v41_n8_p1577_Romano  |y Handle 
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999 |c 84072 

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