32 citations · 47 across the 7 of their papers we have counts for
7 papers
Avoided Stoner instability at a single ordinary Van Hove point
I. S. Tupitsyn, B. Currie, A. V. Chubukov +3
When the Fermi surface and the Brillouin zone boundary touch at a Van Hove point, mean-field analysis predicts a ferromagnetic (Stoner) instability at finite for any coupl…
Dielectric losses in metals
I. S. Tupitsyn, N. V. Prokof'ev
Bethe-Salpeter equation (BSE) in the self-consistent Hartree-Fock (HF) basis is often used for describing complex many-body effects in material science applications. Its exact solu…
Interaction-enhanced nesting in Spin-Fermion and Fermi-Hubbard models
R. Rossi, F. Simkovic, M. Ferrero +4
The spin-fermion (SF) model postulates that the dominant coupling between low-energy fermions in near critical metals is mediated by collective spin fluctuations (paramagnons) peak…
Landau Damping in an Electron Gas
I. S. Tupitsyn, N. V. Prokof'ev
Material science methods aim at developing efficient computational schemes for describing complex many-body effects and how they are revealed in experimentally measurable propertie…
Solving the Bethe-Salpeter Equation in Real Frequencies at Finite Temperature
I. S. Tupitsyn, N. V. Prokof'ev
Self-consistent Hartree-Fock approximation combined with solutions of the Bethe-Salpeter equation offers a powerful tool for studies of strong correlation effects arising in conden…
Effective Hamiltonian in the Problem of a "Central Spin" Coupled to a Spin Environment
I. S. Tupitsyn, N. V. Prokof'ev, P. C. E. Stamp
We consider here the problem of a "giant spin", with spin quantum number S>>1, interacting with a set of microscopic spins. Interactions between the microscopic spins are ignored.…
Wigner Crystalization in the Lowest Landau Level for
V. A. Kashurnikov, N. V. Prokof'ev, B. V. Svistunov +1
By means of exact diagonalization we study the low-energy states of seven electrons in the lowest Landau level which are confined by a cylindric external potential modelling the re…