Abstract:
We demonstrate that the interaction of dc temperature gradient with ac magnetic field in temperature-biased two-dimensional electron systems leads to formation of a new electromagnetic mode, a two-dimensional thermomagnetic wave (2D TMW). This wave is transverse electric and nonreciprocal, and its damping rate can be lower than that of conventional 2D plasma waves. The $Q$-factor of 2D TMW is independent of the wave vector. Numerical estimates show that in state-of-the-art two-dimensional electrons systems the 2D TMW $Q$-factor is the order of 10$^{-3}$. We discuss possible ways to overcome this issue.
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