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5 papers · 1 filter
Extended Falicov-Kimball model: Hartree-Fock vs DMFT approach
Konrad Jerzy Kapcia, Romuald Lemański, Marcin Jakub Zygmunt
In this work, we study the extended Falicov-Kimball model at half-filling within the Hartree-Fock approach (HFA) (for various crystal lattices) and compare the results obtained wit…
Energy scales and magnetoresistance at a quantum critical point
V. R. Shaginyan, M. Ya. Amusia, A. Z. Msezane +2
The magnetoresistance (MR) of CeCoIn_5 is notably different from that in many conventional metals. We show that a pronounced crossover from negative to positive MR at elevated temp…
Universal Behavior of Two-Dimensional 3He at Low Temperatures
V. R. Shaginyan, A. Z. Msezane, K. G. Popov +1
On the example of two-dimensional (2D) 3He we demonstrate that the main universal features of its experimental temperature T - density x phase diagram [see M. Neumann, J. Nyéki, J.…
Universal low-temperature behavior of the CePd_{1-x}Rh_x ferromagnet
V. R. Shaginyan, K. G. Popov, V. A. Stephanovich
The heavy-fermion metal CePd_{1-x}Rh_x evolves from ferromagnetism at x=0 to a non-magnetic state at some critical concentration x_c. Utilizing the quasiparticle picture and the co…
Metal-insulator transition in the quarter- filled frustrated checkerboard lattice
Y. Z. Zhang, Tran Minh-Tien, V. Yushankhai +1
We study the electronic structure and correlations in the geometrically frustrated two dimensional checkerboard lattice. In the large U limit considered here we start from an exten…