19 citations · 77 across the 9 of their papers we have counts for
9 papers
Magnetically ordered phase near transition to Bose-glass phase
A. V. Syromyatnikov, A. V. Sizanov
We discuss magnetically ordered ("superfluid") phase near quantum transition to Bose-glass phase in a simple modeling system, Heisenberg antiferromagnet in spatial dimension …
Spiral magnets with Dzyaloshinskii-Moriya interaction containing defect bonds
O. I. Utesov, A. V. Sizanov, A. V. Syromyatnikov
We present a theory describing spiral magnets with Dzyaloshinskii-Moriya interaction (DMI) subject to bond disorder at small concentration of defects. It is assumed that both D…
Self-consistent T-matrix approach to Bose-glass in one dimension
A. G. Yashenkin, O. I. Utesov, A. V. Sizanov +1
Based on self-consistent T-matrix approximation (SCTMA), the Mott insulator - Bose-glass phase transition of one-dimensional noninteracting bosons subject to binary disorder is con…
Localized and propagating excitations in gapped phases of spin systems with bond disorder
O. I. Utesov, A. V. Sizanov, A. V. Syromyatnikov
Using the conventional -matrix approach, we discuss gapped phases in 1D, 2D, and 3D spin systems (both with and without a long range magnetic order) with bond disorder and with…
Spin nematic states in spin-1 antiferromagnets with easy-axis anisotropy
Alexey Sizanov, Arseny Syromyatnikov
It is well known that spin nematic phases can appear in either frustrated magnets or in those described by Hamiltonians with large exotic non-Heisenberg terms like biquadratic exch…
Spin nematic states in antiferromagnets containing ferromagnetic bonds
Alexey Sizanov, Arseny Syromyatnikov
The majority of recent works devoted to spin nematic phases deal with either frustrated magnets or with those described by Hamiltonians with large non-Heisenberg terms. We show in…
Quantum magnets with large single-ion easy-plane anisotropy in transverse magnetic field
A. V. Sizanov, A. V. Syromyatnikov
We discuss low-temperature properties of magnets with integer spin and large single-ion easy-plane anisotropy in transverse magnetic field . Considering the exchange interac…
Novel approach to description of quantum magnets with large singe-ion easy-plane anisotropy
Alexey V Sizanov, Arseny V Syromyatnikov
We introduce a new representation of an integer spin via bosonic operators which is useful in describing the paramagnetic phase and transitions to magnetically ordered phases i…
Antiferromagnet with two coupled antiferromagnetic sublattices in a magnetic field
Alexey V Sizanov, Arseny V Syromyatnikov
We discuss the magnon spectrum of an antiferromagnet (AF) in a magnetic field consisting of two interpenetrating AF sublattices coupled by the exchange interaction at T=0. One-…