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- W1990242308 abstract "In a generic spin-polarized Fermi liquid, the masses of spin-up and spin-down electrons are expected to be different and to depend on the degree of polarization. This expectation is not confirmed by the experiments on two-dimensional heterostructures. We consider a model of an $N$-fold degenerate electron gas. It is shown that in the large-$N$ limit, the mass is enhanced via a polaronic mechanism of emission or absorption of virtual plasmons. As plasmons are classical collective excitations, the resulting mass does not depend on $N$, and thus on polarization, to the leading order in $1/N$. We evaluate the $1/N$ corrections and show that they are small even for $N=2$." @default.
- W1990242308 created "2016-06-24" @default.
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- W1990242308 date "2005-10-26" @default.
- W1990242308 modified "2023-09-28" @default.
- W1990242308 title "Spin-Independent Effective Mass in a Valley-Degenerate Electron System" @default.
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- W1990242308 doi "https://doi.org/10.1103/physrevlett.95.186801" @default.
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