Spin relaxation in (110)GaAs superlattices with tunnel-coupled quantum wells for both lateral and vertical spin transport

2021 ◽  
Author(s):  
Satoshi Iba ◽  
Yuzo Ohno
Keyword(s):  
Quantum Wells ◽  
Spin Relaxation ◽  
Spin Transport ◽  
Coupled Quantum Wells

Room-temperature spin relaxation in a (110)-oriented GaAs/AlGaAs superlattice with tunnel-coupled quantum wells

2020 ◽  
Vol 13 (12) ◽  
pp. 123003
Author(s):  
Yuzo Ohno ◽  
Satoshi Iba ◽  
Ryogo Okamoto ◽  
Yuma Obata ◽  
Kouki Obu ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Spin Relaxation ◽  
Room Temperature ◽  
Coupled Quantum Wells

scholarly journals Long exciton spin relaxation in coupled quantum wells

2010 ◽  
Vol 97 (1) ◽  
pp. 011104 ◽  
Author(s):  
K. Kowalik-Seidl ◽  
X. P. Vögele ◽  
B. N. Rimpfl ◽  
S. Manus ◽  
J. P. Kotthaus ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Spin Relaxation ◽  
Coupled Quantum Wells

Spin relaxation of indirect excitons in asymmetric coupled quantum wells

2018 ◽  
Vol 122 ◽  
pp. 643-649 ◽  
Author(s):  
C. Abbas ◽  
F. Chiaruttini ◽  
S. Cronenberger ◽  
D. Scalbert ◽  
F. Dubin ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Spin Relaxation ◽  
Coupled Quantum Wells ◽  
Indirect Excitons

INVESTIGATION OF SPIN TRANSPORT IN SEMICONDUCTORS BY SPATIALLY RESOLVED TWO-COLOR HANLE-MOKE MEASUREMENTS

2009 ◽  
Vol 23 (12n13) ◽  
pp. 2760-2765
Author(s):  
W. OSSAU ◽  
J.-H. QUAST ◽  
G. V. ASTAKHOV ◽  
H. HOFFMANN ◽  
L. MOLENKAMP
Keyword(s):  
Relaxation Time ◽  
Quantum Wells ◽  
Spin Relaxation ◽  
Spin Transport ◽  
Spin Diffusion ◽  
Spin Relaxation Time ◽  
Injection Point ◽  
Spin Pumping ◽  
Spatially Resolved ◽  
Considerable Impact

We report on a considerable impact of light on spin transport in unstrained n -type GaAs . Increasing the intensity of optical spin pumping results in a significant expansion of spin diffusion. Furthermore, in the regime of strong spin pumping the spin gradient, which can be interpreted in terms of a spin outflow from the injection point is enhanced by application of a weak magnetic field. In addition we report on optical spin pumping of modulation doped CdTe -based quantum wells. Using a two-color Hanle-MOKE technique, we find a spin relaxation time of 34 ns in the nearly unperturbed electron gas. Independent variation of pump and probe energies demonstrates the presence of additional electrons in the quantum well, whose spin relaxation time is substantially shorter.

COHERENCE AND SPIN RELAXATION OF INTERWELL EXCITONS IN GaAs/AlGaAs COUPLED QUANTUM WELLS

2007 ◽  
Vol 06 (03n04) ◽  
pp. 287-290
Author(s):  
A. V. LARIONOV ◽  
V. B. TIMOFEEV
Keyword(s):  
Quantum Wells ◽  
Relaxation Rate ◽  
Spin Relaxation ◽  
Tunable Laser ◽  
Resonance Excitation ◽  
Photoluminescence Spectra ◽  
Coupled Quantum Wells ◽  
Spin Relaxation Rate ◽  
Indirect Excitons ◽  
Kinetics Of

The kinetics of spin orientated interwell excitons gas has been investigated in GaAs / AlGaAs coupled quantum wells (n–i–n heterostructures). In these structures, the electrons and the holes are spatially separated between neighboring quantum wells by a narrow AlAs barrier. The time evolution and kinetics of photoluminescence spectra of interwell excitons have been measured under the pulse resonance excitation of intrawell 1sHH excitons using a pulsed tunable laser. The temporal formation of collective excitons phase and the temperature dependence of its spin relaxation rate have been studied. It was observed that spin relaxation rate of interwell excitons in the collective phase is strongly reduced. The observed effect is an evidence of the coherence of indirect excitons' collective phase at the temperatures below the critical one.

Theory of Light-Induced Drift of Electrons in Coupled Quantum Wells

1992 ◽  
Author(s):  
Mark I. Stockman ◽  
Leonid S. Muratov ◽  
Thomas F. George
Keyword(s):  
Quantum Wells ◽  
Coupled Quantum Wells

Control of the electron spin relaxation by the built-in piezoelectric field in InGaAs quantum wells

2016 ◽  
Vol 108 (8) ◽  
pp. 082103 ◽  
Author(s):  
S. Azaizia ◽  
A. Balocchi ◽  
H. Carrère ◽  
P. Renucci ◽  
T. Amand ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Spin Relaxation ◽  
Electron Spin ◽  
Electron Spin Relaxation ◽  
Piezoelectric Field

Study of electron-related intersubband optical properties in three coupled quantum wells wires with triangular transversal section

2015 ◽  
Vol 87 ◽  
pp. 131-136 ◽  
Author(s):  
A. Tiutiunnyk ◽  
V. Tulupenko ◽  
V. Akimov ◽  
R. Demediuk ◽  
A.L. Morales ◽  
...  
Keyword(s):  
Optical Properties ◽  
Quantum Wells ◽  
Coupled Quantum Wells ◽  
Transversal Section

Luminescence studies of resonant tunneling in a triple barrier structure with strongly coupled quantum wells

1994 ◽  
Vol 37 (4-6) ◽  
pp. 721-724 ◽  
Author(s):  
T.S. Turner ◽  
P.M. Martin ◽  
L. Eaves ◽  
H.B. Evans ◽  
P.A. Harrison ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Resonant Tunneling ◽  
Barrier Structure ◽  
Coupled Quantum Wells ◽  
Strongly Coupled
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