scholarly journals Dominant spin relaxation mechanism in compound organic semiconductors

2010 ◽  
Vol 81 (15) ◽  
Author(s):  
Supriyo Bandyopadhyay
Keyword(s):  
Organic Semiconductors ◽  
Spin Relaxation ◽  
Relaxation Mechanism

Dual Nature of the Spin Relaxation Mechanism in Layered Hybrid Perovskites

2020 ◽  
Author(s):  
Franco V. A. Camargo ◽  
Soumen Ghosh ◽  
Sean A. Bourelle ◽  
Ravichandran Shivanna ◽  
Richard H. Friend ◽  
...  
Keyword(s):  
Spin Relaxation ◽  
Relaxation Mechanism ◽  
Dual Nature

Studies on Electron Spin Relaxation in AlGaAs/GaAs Multi Quantum Wells

2011 ◽  
Vol 143-144 ◽  
pp. 216-219
Author(s):  
Yu Wu
Keyword(s):  
Quantum Wells ◽  
Spin Relaxation ◽  
Electron Spin ◽  
Carrier Density ◽  
Relaxation Mechanism ◽  
Electron Spin Polarization ◽  
Time Resolved ◽  
Pump Probe ◽  
Electron Spin Relaxation ◽  
Probe Spectroscopy

Time-resolved circularly polarized pump-probe spectroscopy is used to study the carrier density dependence of the electron spin polarization dynamics in AlGaAs/GaAs multi quantum wells at room temperature. Experimental results show that the spin relaxation time increases with the carrier density, which is in conformity with D'yakonov-Perel relaxation mechanism.

Radical addition to ruthenocene at low temperatures: characterization of ruthenocenyl radicals by μSR spectroscopy

2018 ◽  
Vol 96 (3) ◽  
pp. 358-362 ◽  
Author(s):  
Iain McKenzie
Keyword(s):  
Dft Calculations ◽  
Spin Relaxation ◽  
Muon Spin ◽  
Transverse Field ◽  
Relaxation Mechanism ◽  
Coupling Constants ◽  
Muon Spin Rotation ◽  
Electron Spin Relaxation ◽  
Spin Resonance ◽  
Experimental Values

The radicals formed by muonium (Mu) addition to ruthenocene at low temperature (4–200 K) have been characterized by transverse field muon spin rotation (TF-μSR) and avoided level crossing muon spin resonance (ALC-μSR) spectroscopy. The structures of the muoniated radicals have been identified by comparing the experimentally measured muon hyperfine coupling constants with values obtained from DFT calculations (UB3LYP/DGDZVP). Mu addition was observed at the ruthenium and at the cyclopentadiene (Cp) rings, both from the exterior and interior directions. Closer agreement between the DFT calculations and the experimental values are obtained if it is assumed the structures of the Mu adducts of the Cp rings are distorted due to interactions with neighbouring molecules. Changes in the ALC-μSR spectra with temperature indicated that the electron spin relaxation rate of the Cp adducts increases with temperature; however, the specific spin relaxation mechanism is unknown.

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