ar X iv : c on d - m at / 0 30 13 89 v 1 2 1 Ja n 20 03 Spin - photocurrent in p - SiGe quantum wells under terahertz laser irradiation

ar X iv : c on d - m at / 0 30 13 88 v 1 2 1 Ja n 20 03 Optical Spin Orientation under Inter - and Intra - Subband Transitions in QWs

It is shown that absorption of circularly polarized infrared radiation achieved by inter-subband and intra-subband (Drude-like) transitions results in a monopolar spin orientation of free carriers. The monopolar spin polarization in zinc-blende-based quantum wells (QWs) is demonstrated by the observation of the spin-galvanic and circular photogalvanic effects. It is shown that monopolar spin or...

ar X iv : m at h - ph / 0 30 10 19 v 1 1 5 Ja n 20 03 Which distributions of matter diffract ? — Some answers

ar X iv : c on d - m at / 0 30 53 96 v 1 1 6 M ay 2 00 3 High temperature gate control of quantum well spin memory

Time-resolved optical measurements in (110)-oriented GaAs/AlGaAs quantum wells show a tenfold increase of the spin-relaxation rate as a function of applied electric field from 20 to 80 kV cm at 170 K and indicate a similar variation at 300 K, in agreement with calculations based on the Rashba effect. Spin relaxation is almost field-independent below 20 kV cm reflecting quantum well interface as...

ar X iv : c on d - m at / 0 31 13 63 v 1 1 5 N ov 2 00 3 Tunneling effect of the spin - 2 Bose condensate driven by external magnetic fields

In this paper, we have studied tunneling effect of the spin-2 Bose condensate driven by external magnetic field. We find that the population transfers among spin-0 and spin-±1, spin-0 and spin-±2 exhibit the step structure under the external cosinusoidal magnetic field respectively , but there do not exist step structure among spin-±1 and spin-±2. The tunneling current among spin-±1 and spin-±2...

ar X iv : c on d - m at / 0 30 12 85 v 1 1 6 Ja n 20 03 Polaronic Heat Capacity in The Anderson - Hasegawa Model

An exact treatment of the Anderson Hasegawa two site model, incorporating the presence of superexchange and polarons, is used to compute the heat capacity. The calculated results point to the dominance of the lattice contribution, especially in the ferromagnetic regime. This behavior is in qualitative agreement with experimental findings. PACS No. 63.20. Kr, 75.30. Et, 75.40.-s ∗Electronic addr...