Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2005-07-24
Phys. Rev. B 72, 205303 (2005)
Physics
Condensed Matter
Disordered Systems and Neural Networks
11 pages, 5 figures
Scientific paper
The temperature dependence of 2D magnetoresistance in an applied in-plane magnetic field is theoretically considered for electrons in Si MOSFETs within the screening theory for long-range charged impurity scattering limited carrier transport. In agreement with recent experimental observations we find an essentially temperature independent magnetoresistivity for carrier densities well into the 2D metallic regime due to the field-induced lifting of spin and, perhaps, valley degeneracies. In particular the metallic temperature dependence of the ballistic magnetoresistance is strongly suppressed around the zero-temperature critical magnetic field ($B_s$) for full spin-polarization, with the metallic temperature dependence strongest at B=0, weakest around $B \sim B_s$, and intermediate at $B \gg B_s$.
Hwang Euyheon H.
Sarma Sankar Das
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