Spin-sensitive bleaching and spin relaxation in QWs

Spin–sensitive Bleaching and Spin–Relaxation in QW’s

Spin-sensitive saturation of absorption of infrared radiation has been investigated in p-type GaAs QWs. It is shown that the absorption saturation of circularly polarized radiation is mostly controlled by the spin relaxation time of the holes. The saturation behavior has been investigated for different QW widths and in dependence on the temperature with the result that the saturation intensity ...

Spin-sensitive bleaching and monopolar spin orientation in quantum wells.

Spin-sensitive bleaching of the absorption of far-infrared radiation has been observed in p-type GaAs/AlGaAs quantum well structures. The absorption of circularly polarized radiation saturates at lower intensities than that of linearly polarized light due to monopolar spin orientation in the first heavy-hole subband. Spin relaxation times of holes in p-type material in the range of tens of ps w...

Generalized spin-glass relaxation.

Spin relaxation close to the glass temperature of CuMn and AuFe spin glasses is shown, by neutron spin echo, to follow a generalized exponential function which explicitly introduces hierarchically constrained dynamics and macroscopic interactions. The interaction parameter is directly related to the normalized Tsallis nonextensive entropy parameter q and exhibits universal scaling with reduced ...

Spin Relaxation in Magnetic Nanostructures

Spin relaxation in conducting chains

2014 The spin lattice relaxation time T1 of a Hubbard chain for large U is proportional to the square root of the Larmor frequency 03C9 for a non-half-filled band as well as for the (already known) case of a half-filled band. The proportionality coefficient has a finite limit when U goes to ~, except for a half-filled band.