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5 papers · 2 filters
Sharp increase of the effective mass near the critical density in a metallic 2D electron system
A. A. Shashkin, S. V. Kravchenko, V. T. Dolgopolov +1
We find that at intermediate temperatures, the metallic temperature dependence of the conductivity σ(T) of 2D electrons in silicon is described well by a recent interaction-based t…
Dielectric signatures of lattice instabilities at 32K and 245K in (M=Cu,Ni) Cuprates and Nickelates
P. V. Parimi, N. Hakim, F. C. Chou +2
New dielectric transitions are observed at common temperatures 32K and 245K, in isostructural and that are signatures of local lattice…
"Forbidden" transitions between quantum Hall and insulating phases in p-SiGe heterostructures
M. R. Sakr, Maryam Rahimi, S. V. Kravchenko +3
We show that in dilute metallic p-SiGe heterostructures, magnetic field can cause multiple quantum Hall-insulator-quantum Hall transitions. The insulating states are observed betwe…
Comment on "Low-Density Spin Susceptibility and Effective Mass of Mobile Electrons in Si Inversion Layers"
S. V. Kravchenko, A. A. Shashkin, V. T. Dolgopolov
In a recent Letter (PRL 88, 196404 (2002)), the effective g-factor and the effective mass have been studied by Pudalov et al. in a dilute 2D electron system in silicon. The authors…
Treatment of Correlation Effects in Electron Momentum Density: Density Fuctional Theory and Beyond
B. Barbiellini, A. Bansil
Recent high resolution Compton scattering experiments clearly reveal that there are fundamental limitations to the conventional local density approximation (LDA) based description…