3 papers
cond-mat.stat-mech2026
Continuous and discontinuous transitions in the Ising-Heisenberg model on the extended Lieb lattice in a magnetic field
David Sivy, Jozef Strecka
The spin-1/2 Ising-Heisenberg model on the extended Lieb lattice in a magnetic field is exactly mapped onto an effective spin-1/2 Ising model on the square lattice. The ground-stat…
cond-mat.stat-mech2026
Magnetoelastic signatures of thermal and quantum phase transitions in a deformable Ising chain under a longitudinal and transverse magnetic field
David Sivy, Jozef Strecka
We investigate a deformable spin-1/2 Ising chain subjected to either a longitudinal or a transverse magnetic field, which incorporates a magnetoelastic coupling linearly dependent…
cond-mat.stat-mech2024
Quantum Magnetism in Fe2Cu2 Polymeric Branched Chains: Insights from Exactly Solved Ising-Heisenberg Model
David Sivy, Katarina Karlova, Jozef Strecka
The spin-1/2 Ising-Heisenberg branched chain, inspired by the magnetic structure of three isostructural polymeric coordination compounds [(Tp)2Fe2(CN)6X(bdmap)Cu2(H2O)].H2O to be f…