9 papers
Dynamical nuclear polarization and nuclear magnetic fields in semiconductor nanostructures
Ionel Tifrea, Michael E. Flatte
We investigate the dynamic nuclear polarization from the hyperfine interaction between nonequilibrium electronic spins and nuclear spins coupled to them in semiconductor nanostruct…
Bose-Einstein condensation of magnons
M. Crisan, D. Bodea, I. Tifrea +1
We use the Renormalization Group method to study the Bose-Einstein condensation of the interacting dilute magnons which appears in three dimensional spin systems in magnetic field.…
Non-Fermi liquid behavior of the electrical resistivity at the ferromagnetic quantum critical point
D. Bodea, M. Crisan, I. Grosu +1
We propose a model for the non-Fermi behavior in the proximity of the quantum phase transition induced by the strong polarization of the electrons due to local magnetic moments. Th…
Finite - temperature quantum phase transition in d - waves superconductors
M. Crisan, D. Bodea, I. Grosu +1
The zero temperature d - wave superconductor phase transition theory given in the case of T=0 for two - dimensional superconductors (I. Herbut, PRL {\bf 85}, 1532 (2000)) is genera…
Field-Theoretical description of the crossover between BCS and BEC in a non-Fermi superconductor
C. P. Moca, I. Tifrea, M. Crisan
Using the field-theoretical methods we studied the evolution from BCS description of a non-Fermi superconductor to that of Bose-Einstein condensation (BEC) in one loop approximatio…
Non-Fermi behavior of the disorder electronic system
C. P. Moca, I. Tifrea, M. Crisan
We showed that an electronic system with weak disorder considered in the finite-charge infinite U Hubbard model can present a non-Fermi behavior. The imaginary pert of the self-ene…