Autor: Wilamowski, Z. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Dyakonov--Perel Spin Relaxation Suppressed by an Applied Magnetic Field
Autorzy:: Wilamowski, Z.
Jantsch, W.
Powiązania:: https://bibliotekanauki.pl/articles/2036865.pdf
Data publikacji:: 2003-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 72.25.Rb
73.21.Fg
85.75.-d
Opis:: We observe a strong anisotropy of spin relaxation and a decrease in the spin relaxation rate with increasing electron mobility in contrast to predictions of the classical D'yakonov-Perel spin relaxation model. We show that for high electron mobility the cyclotron motion causes an additional modulation of spin-orbit coupling, leading to an effective suppression of the spin relaxation rate.
Źródło:: Acta Physica Polonica A; 2003, 103, 6; 671-674
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Spin Resonance Absorption in a 2D Electron Gas
Autorzy:: Ungier, W.
Jantsch, W.
Wilamowski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/2047694.pdf
Data publikacji:: 2007-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 85.75.-d
73.63.Hs
75.75.+a
76.30.-v
Opis:: We analyze the power absorption at electron spin resonance excited by the Bychkov-Rashba spin-orbit field in a 2D electron gas. We show that, as long as the absorbed power is dissipated by the usual spin lattice relaxation mechanisms, the resonance line shape is expected to be of pure absorption type, i.e., it can be described by the imaginary part of the dynamic magnetic susceptibility. Therefore, the Dysonian line shape observed in ESR of 2D electron gas cannot result from this type of the resonance signal.
Źródło:: Acta Physica Polonica A; 2007, 112, 2; 345-350
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Limitations in the Tunability of the Spin Resonance of 2D Electrons in Si by an Electric Current
Autorzy:: Wilamowski, Z.
Malissa, H.
Glazov, M.
Jantsch, W.
Powiązania:: https://bibliotekanauki.pl/articles/2047703.pdf
Data publikacji:: 2007-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 85.75.-d
73.63.Hs
75.75.+a
76.30.-v
Opis:: We analyse the recently observed effect of an in-plane electric current through a Si quantum well on the conduction electron spin resonance. We find that the ratio of resonance shift and current density is independent of temperature and dissipation processes, but the channel current is reduced due to a parallel electric channel in heavily modulation doped samples. The inhomogeneous current distribution results in some broadening of the ESR line width. In high mobility Si/SiGe layers the current induced increase in the electron temperature is considerably larger than the increase in the lattice temperature. The signal amplitude scales with the square of electron mobility.
Źródło:: Acta Physica Polonica A; 2007, 112, 2; 375-379
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Bychkov-Rashba Effect and g-Factor Tuning in Modulation Doped SiGe Quantum Wells
Autorzy:: Malissa, H.
Jantsch, W.
Mühlberger, M.
Schäffler, F.
Wilamowski, Z.
Draxler, M.
Bauer, P.
Powiązania:: https://bibliotekanauki.pl/articles/2038126.pdf
Data publikacji:: 2004-06
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.21.Fg
85.75.-d
Opis:: We investigate the spin resonance of electrons in one-sided modulation doped Si$\text{}_{1-x}$Ge$\text{}_{x}$ (x=0-10%)) quantum wells defined by Si$\text{}_{0.75}$Ge$\text{}_{0.25}$ barriers. In such structures, the Bychkov-Rashba effect induces an effective magnetic field in the quantum well layer which causes anisotropy of both the g-factor and the spin coherence time. Evaluation of the Rashba coefficient as a function of x yields a monotonic increase. For x=5% the shift in the resonance field exceeds the ESR linewidth already, demonstrating the possibility to use this effect for g-factor tuning to select individual spins in an ensemble.
Źródło:: Acta Physica Polonica A; 2004, 105, 6; 585-590
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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