Spin Resonance Absorption in a 2D Electron Gas
W. Ungier a, W. Jantsch b and Z. Wilamowski a,c
a Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668 Warsaw, Poland
b Institute of Semiconductor and Solid State Physics, Johannes Kepler University, Linz, Austria
c Faculty of Mathematics and Computer Sciences, UWM, Olsztyn, Poland
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Received: 9 06 2007;
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.
DOI: 10.12693/APhysPolA.112.345
PACS numbers: 85.75.-d, 73.63.Hs, 75.75.+a, 76.30.-v