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45 papers · 1 filter
Interaction-tuned compressible-to-incompressible phase transitions in the quantum Hall systems
Z. Papić, N. Regnault, S. Das Sarma
We analyze transitions between quantum Hall ground states at prominent filling factors in the spherical geometry by tuning the width parameter of the Zhang-Das Sarma interactio…
Spin dynamics in Heisenberg triangular antiferromagnets: A muSR study of LiCrO2
A. Olariu, P. Mendels, F. Bert +4
We report a muSR study of LiCrO2, which has a magnetic lattice made up of a stacking of triangular Heisenberg antiferromagnetic (Cr3+, S = 3/2) layers. A static magnetically ordere…
Antiferromagnetism and the gap of a Mott insulator: Results from analytic continuation of the self-energy
Xin Wang, Emanuel Gull, Luca de' Medici +2
Direct analytic continuation of the self energy is used to determine the effect of antiferromagnetic ordering on the spectral function and optical conductivity of a Mott insulator.…
Impurity-induced magnetic order in low dimensional spin gapped materials
J. Bobroff, N. Laflorencie, L. K. Alexander +3
We have studied the effect of non-magnetic Zn impurities in the coupled spin-ladder Bi(Cu1xZnx)2PO6 using 31P NMR, muSR and Quantum Monte Carlo simulations. Our results show that t…
Surface dead layer for quasiparticles near a Mott transition
Giovanni Borghi, Michele Fabrizio, Erio Tosatti
Electron quasiparticles are progressively weakened by correlations upon approaching a continuos Mott metal insulator transition in a bulk solid. We show that corresponding to the b…
Dynamical mean field theory of an effective three-band model for NaCoO
A. Bourgeois, A. A. Aligia, M. J Rozenberg
We derive an effective Hamiltonian for highly correlated states centered at the Co sites of NaCoO. The essential ingredients of the model are an O mediated hopping…