13 citations · 41 across the 9 of their papers we have counts for
8 papers
Altermagnetism without a long-range order
V. E. Valiulin, A. V. Mikheyenkov, K. I. Kugel
The Kugel-Khomskii spin-pseudospin model, originally developed for transition-metal compounds with orbital degrees of freedom, has recently been reinterpreted in the context of alt…
Time-dependent exchange creates the time-frustrated state of matter
V. E. Valiulin, N. M. Chtchelkatchev, A. V. Mikheyenkov +1
Magnetic systems governed by exchange interactions between magnetic moments harbor frustration that leads to ground state degeneracy and results in the new topological state often…
The resistance of quantum entanglement to temperature in the Kugel-Khomskii model
V. E. Valiulin, A. V. Mikheyenkov, N. M. Chtchelkatchev +1
The Kugel--Khomskii model with entangled spin and orbital degrees of freedom is a good testing ground for many important features in quantum information processing, such as robust…
Quantum entanglement, local indicators and effect of external fields in the Kugel-Khomskii model
V. E. Valiulin, A. V. Mikheyenkov, N. M. Chtchelkatchev +1
Using the exact diagonalization technique, we determine the energy spectrum and wave functions for finite chains described by the two-spin (Kugel--Khomskii) model with different ty…
Magnetic spiral order in the square-lattice spin system (CuBr)SrNbO
A. V. Mikheyenkov, V. E. Valiulin, A. F. Barabanov
We address quantum spin helical states in the strongly frustrated Heisenberg model. Contrary to conventional Dzyaloshinskii-Moriya approach we show that such states appear without…
Thermodynamics of symmetric spin--orbital model: One- and two-dimensional cases
V. E. Valiulin, A. V. Mikheyenkov, K. I. Kugel +1
The specific heat and susceptibilities for the two- and one-dimensional spin--orbital models are calculated in the framework of a spherically symmetric self-consistent approach at…