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5 papers · 2 filters
Helicity, anisotropies and their competition in a multiferroic magnet: insight from the phase diagram
M. V. Gvozdikova, T. Ziman, M. E. Zhitomirsky
Motivated by the complex phase diagram of MnWO4, we investigate competition between anisotropy, magnetic field, and helicity for the anisotropic next-nearest-neighbor Heisenberg mo…
Observation of an anisotropic Dirac cone reshaping and ferrimagnetic spin polarization in an organic conductor
Michihiro Hirata, Kyohei Ishikawa, Kazuya Miyagawa +6
The Coulomb interaction among massless Dirac fermions in graphene is unscreened around the isotropic Dirac points, causing a logarithmic velocity renormalization and a cone reshapi…
Progress in Many Body Theory with the Equation of Motion method. Time dependent Density Matrix meets Self-Consistent RPA. Applications to solvable Models
Peter Schuck, Mitsuru Tohyama
The Bogoliubov-Born-Green-Kirkwood-Yvon or Time-Dependent Density Matrix (TDDM) hierarchy of equations for higher density matrices is truncated at the three body level in approxima…
Sum-rules and Goldstone modes from extended RPA theories in Fermi systems with spontaneously broken symmetries
D. S. Delion, P. Schuck, M. Tohyama
The Self-Consistent RPA (SCRPA) approach is elaborated for cases with a continuously broken symmetry, this being the main focus of the present article. Correlations beyond standard…
Emergence of fractional statistics for tracer particles in a Laughlin liquid
Douglas Lundholm, Nicolas Rougerie
We consider a thought experiment where two distinct species of 2D particles in a perpendicular magnetic field interact via repulsive potentials. If the magnetic field and the inter…