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Minigap in superconductor-ferromagnet junctions with inhomogeneous magnetization
D. A. Ivanov, Ya. V. Fominov
We consider the minigap in a disordered ferromagnet (F) in contact with a superconductor (S) in the situation when the magnetization of the F layer is inhomogeneous in space and no…
Quantum mechanics with a time-dependent random unitary Hamiltonian: A perturbative study of the nonlinear Keldysh sigma-model
D. A. Ivanov, M. A. Skvortsov
We analyze the perturbative series of the Keldysh-type sigma-model proposed recently for describing the quantum mechanics with time-dependent Hamiltonians from the unitary Wigner-D…
A Variational Monte Carlo Study of the Current Carried by a Quasiparticle
Cody P Nave, Dmitri A. Ivanov, Patrick A. Lee
With the use of Gutzwiller-projected variational states, we study the renormalization of the current carried by the quasiparticles in high-temperature superconductors and of the qu…
Resonating-valence-bond structure of Gutzwiller-projected superconducting wave functions
D. A. Ivanov
Gutzwiller-projected (GP) wave functions have been widely used for describing spin-liquid physics in frustrated magnets and in high-temperature superconductors. Such wave functions…
Minigap in a SN junction with paramagnetic impurities
B. Crouzy, E. Bascones, D. A. Ivanov
We study the effect of spin-flip scattering on the density of states in a long diffusive S-N junction with transparent interface. We calculate the critical value of the spin-flip s…
Zero-Temperature Properties of the Quantum Dimer Model on the Triangular Lattice
Arnaud Ralko, Michel Ferrero, Federico Becca +2
Using exact diagonalizations and Green's function Monte Carlo simulations, we have studied the zero-temperature properties of the quantum dimer model on the triangular lattice on c…