Very efficient electrical spin injection (/detection) into quantum dots at zero magnetic field

Spintronics X ◽  
2017 ◽  
Author(s):  
Fabian Cadiz ◽  
Delphine Lagarde ◽  
Shiheng Liang ◽  
Bingshan Tao ◽  
Julien Frougier ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Spin Injection ◽  
Zero Magnetic Field ◽  
Electrical Spin

scholarly journals Large and robust electrical spin injection into GaAs at zero magnetic field using an ultrathin CoFeB/MgO injector

2014 ◽  
Vol 90 (8) ◽  
Author(s):  
S. H. Liang ◽  
T. T. Zhang ◽  
P. Barate ◽  
J. Frougier ◽  
M. Vidal ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Injection ◽  
Zero Magnetic Field ◽  
Electrical Spin

scholarly journals Nuclear magnetization in gallium arsenide quantum dots at zero magnetic field

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
G. Sallen ◽  
S. Kunz ◽  
T. Amand ◽  
L. Bouet ◽  
T. Kuroda ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Gallium Arsenide ◽  
Zero Magnetic Field ◽  
Nuclear Magnetization

Electrical spin injection into InGaAs quantum dots

2006 ◽  
Vol 3 (7) ◽  
pp. 2406-2409 ◽  
Author(s):  
W. Löffler ◽  
D. Tröndle ◽  
J. Fallert ◽  
E. Tsitsishvili ◽  
H. Kalt ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Spin Injection ◽  
Electrical Spin

scholarly journals Молекулярные состояния композитных фермионов в самоорганизованных квантовых точках InP/GaInP в нулевом внешнем магнитном поле

2020 ◽  
Vol 54 (2) ◽  
pp. 138
Author(s):  
А.М. Минтаиров
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Near Field ◽  
Optical Microscope ◽  
Zero Magnetic Field ◽  
Composite Fermions ◽  
Photoluminescence Spectra ◽  
Topological Quantum ◽  
Near Field Scanning ◽  
The Magnetic Field

Abstract The size and positions of regions of line localization and the magnetic-field (0–10 T) dependence of the low-temperature (10 K) photoluminescence spectra of single InP/GaInP quantum dots with a number of electrons of N = 5–7 and a Wigner–Seitz radius of ~2.5 are determined using a near-field scanning optical microscope. The formation of composite fermion molecules with a size coinciding with that of localization regions and bond lengths of ~30 and 50 nm, respectively, at a Landau-level filling factor from 1/2 to 2/7 in zero magnetic field is established. At N = 6, the pairing and rearrangement of composite fermions under photoexcitation are found, which offers opportunities for the use of InP/GaInP quantum dots to create a magnetic-field-free topological quantum gate.

Injection of spin polarized electrons in InAs quantum dots

2009 ◽  
Vol 1208 ◽  
Author(s):  
Andreas Russ ◽  
Mesut Yasar ◽  
Athos Petrou ◽  
George Kioseoglou ◽  
Connie Li ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Spin Injection ◽  
Emission Spectra ◽  
Exchange Interactions ◽  
Electron Spin Polarization ◽  
Polarized Electrons ◽  
Inas Quantum Dots ◽  
Spin Polarized ◽  
Spin Led

AbstractWe present the results of an electrical injection study of spin polarized electrons from ferromagnetic Fe contacts into electronic shells of self-assembled InAs quantum dots (QDs) incorporated in GaAs/AlGaAs spin LED structures. The circular polarization of the emitted light was measured as function of current and magnetic field. The polarization of the EL spectra exhibits strong maxima at energies that do not coincide with the electroluminescence (EL) intensity peaks. The magnetic field dependence of the polarization maxima is consistent with spin injection from the ferromagnetic Fe contacts. The experimental results are compared with calculated emission spectra from multi-exciton complexes (N = 2 and N = 6) as function of electron spin polarization. The energies of the EL features as well as their polarization characteristics are understood in terms of energy shifts due to exchange interactions between spin-down electrons occupying adjacent shells.

Hund's First and Second Rules in Spherical Quantum Dots (I) in the Zero-Magnetic Field

2004 ◽  
Vol 43 (7A) ◽  
pp. 4424-4433 ◽  
Author(s):  
Yusuke Asari ◽  
Kyozaburo Takeda ◽  
Hiroyuki Tamura
Keyword(s):  
Magnetic Field ◽  
Quantum Dots ◽  
Zero Magnetic Field

Electrical spin injection into InGa(N)As quantum structures and single InGaAs quantum dots

2006 ◽  
Vol 243 (14) ◽  
pp. 3812-3824 ◽  
Author(s):  
M. Hetterich ◽  
W. Löffler ◽  
J. Fallert ◽  
N. Höpcke ◽  
H. Burger ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Spin Injection ◽  
Quantum Structures ◽  
Electrical Spin
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