Current heating of a magnetic 2DEG in HgMnTe/HgCdTe quantum wells
Gui, Y. S. · Becker, C. R. · Liu, J. · Koenig, M. · Daumer, V. · Kiselev, M. N. · Buhmann, H. · Molenkamp, L. W.
Original · EN
Heating caused by electrons with excess kinetic energy has been investigated in a magnetic two-dimensional electron gas, M2DEG, in HgMnTe/HgCdTe(001) quantum wells. The temperature of the Mn ions, Tₘn, has been determined by the node positions in the beating pattern in Shubnikov-de Haas oscillations.The experimental dependence of Tₘn on current and therefore on electron temperature, is in excellent agreement with a rate equation model. Results with this model show that the energy transfer rate from the electrons to the Mn system is proportional to the Mn concentration.
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