Zobrazeno 1 - 10
of 38
pro vyhledávání: '"L Fernandes dos Santos"'
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The characteristic energies, occupancies and polarizations of the minibands formed by the Γ-Γ and Γ-Xz interlayer electon tunnelings in the InGaAs/InP superlattices are studied in the regime of the integer quantum Hall effect by polarization resol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f204f1cb985b429cc15b2a084f40ee1c
Autor:
A. K. Bakarov, Yuri A. Pusep, B. G. Barbosa, Jonathan Ludwig, L. Fernandes dos Santos, Dmitry Smirnov, G. M. Gusev
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Magnetophotoluminescence and magnetotransport were studied in a GaAs/AlGaAs triple quantum well. Oscillations of the photoluminescence intensity observed in tilted magnetic fields were found to correspond to the interlayer tunneling quantum Hall gap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e35dd4cf2ed56ec72d45565982ccb88
Publikováno v:
AIP Conference Proceedings.
Polarized photoluminescence from multiple well electron systems was studied in the regime of the integer quantum Hall effect. Two quantum Hall ferromagnetic ground states assigned to the uncorrelated miniband quantum Hall state and to the spontaneous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f3f1816cd09496dc5a33f742659aa45
https://doi.org/10.1063/1.4848397
https://doi.org/10.1063/1.4848397
Autor:
G. E. Marques, Dmitry Smirnov, L. Villegas-Lelovsky, L. Fernandes dos Santos, Victor Lopez-Richard, Yuri A. Pusep, A. K. Bakarov, G. M. Gusev
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
We employ the circular-polarization-resolved magnetophotoluminescence technique to probe the spin character of electron and hole states in a GaAs/AlGaAs strongly coupled double-quantum-well system. The photoluminescence (PL) intensities of the lines
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a801dafc0da745de73ea87e9461d7e46
https://doi.org/10.1103/physrevb.86.125415
https://doi.org/10.1103/physrevb.86.125415
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8137678317cdcc741efd70d3543ece8e
https://doi.org/10.1103/physrevb.85.045302
https://doi.org/10.1103/physrevb.85.045302
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Polarized magnetophotoluminescence is employed to study the energies and occupancies of four lowest Landau levels in a couple quantum Hall $\mathrm{GaAs}/\mathrm{AlGaAs}$ double quantum well. As a result, a magnetic field-induced redistribution of ch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72ab865d998b3df4a98204d71e56de9e
Autor:
Dmitry Smirnov, G. E. Marques, L. Fernandes dos Santos, A. K. Bakarov, J X Padilha, Yu. A. Pusep, A. I. Toropov, Leonardo K. Castelano, Victor Lopez-Richard
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
This work aims to investigate the effects of magnetic field strength and direction on the electronic properties and optical response of GaAs/AlGaAs-based heterostructures. An investigation of the excitonic spin-splitting of a disordered multiple quan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::36ccdff9b646e1b031f9e9eb72eac3a7
https://doi.org/10.1088/0953-8984/28/5/055503
https://doi.org/10.1088/0953-8984/28/5/055503
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The effects of temperature on the optical properties of lattice matched InGaAs/InP superlattices are reported. We found that the PL spectra are dominated by the recombination of carriers in the lowest energy minibands formed by – and –X. Effects
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24a5986fb21d0d4470d419a25c8cb593
https://doi.org/10.1088/0022-3727/48/46/465101
https://doi.org/10.1088/0022-3727/48/46/465101
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Optical properties of intentionally disordered multiple quantum well (QW) system embedded in a wide AlGaAs parabolic well were investigated by photoluminescence (PL) measurements as functions of the laser excitation power and the temperature. The cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9b3b8af8cff656ee2bbda4a2f3664260
https://doi.org/10.1063/1.4730769
https://doi.org/10.1063/1.4730769
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
The photoluminescence from individual quantum wells of artificially disordered weakly coupled multi-layers embedded in wide AlGaAs parabolic wells was investigated in a strong magnetic field. We show that the response of the individual wells is very
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::954b8d7128ebb0c5d569bee97fde8048
https://doi.org/10.1209/0295-5075/97/17010
https://doi.org/10.1209/0295-5075/97/17010