Study of a two-dimensional electron gas in a magnetic field. I. Weak field
نویسندگان
چکیده
منابع مشابه
Non-uniform two-dimensional electron gas in a magnetic field
Basic properties of a two-dimensional electron gas with spatially varying carrier concentration in external magnetic fields are reviewed. The two main problems: modification of galvanomagnetic coefficients due to random fluctuations of equilibrium concentration and the concentration gradient created by the Lorenz force in the Hall direction — are considered for weak, classically strong, and qua...
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We calculate the stopping power for heavy-ion diclusters moving in a strongly coupled two-dimensional electron gas system by using the local field corrected dielectric function at finite temperature. We obtain a parameterized local field correction factor based on a relation between the thermal compressibility and exchange-correlation energy in two-dimension. The interpolated parameter is deriv...
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The density of states and the Hall conductivity of a two-dimensional electron gas in a uniform magnetic field and in the presence of a δ-impurity are exactly calculated using elementary field theoretic techniques. The impurity creates one localized state per Landau level, but the Hall conductivity is unaffected. Our treatment is explicitly gauge-invariant, and can be easily adapted to other pro...
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We study the spectral density function of a two-dimensional electron liquid in a weak magnetic field, the filling factor ν ≫ 1. A hydrodynamic model for low-energy excitations of the liquid is developed. It is found that even at ν ≫ 1 the density of states exhibits a gap at low energies. Its width 2E 0 depends on the strength of interaction only logarithmically, 2E 0 = (¯ hω c /ν) ln(νe 2 /ε¯ h...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1979
ISSN: 0163-1829
DOI: 10.1103/physrevb.19.831