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Towards lattice-gas description of low-temperature properties above the Haldane and cluster-based Haldane ground states of a mixed spin-(1,1/2) Heisenberg octahedral chain
Katarina Karlova, Jozef Strecka, Johannes Richter
The rich ground-state phase diagram of the mixed spin-(1,1/2) Heisenberg octahedral chain was previously elaborated from effective mixed-spin Heisenberg chains, which were derived…
Disorder-Free Localization and Many-Body Quantum Scars from Magnetic Frustration
Paul A. McClarty, Masudul Haque, Arnab Sen +1
The concept of geometrical frustration has led to rich insights into condensed matter physics, especially as a mechansim to produce exotic low energy states of matter. Here we show…
Magnetization process and low-temperature thermodynamics of a spin-1/2 Heisenberg octahedral chain
Jozef Strecka, Johannes Richter, Oleg Derzhko +2
Low-temperature magnetization curves and thermodynamics of a spin-1/2 Heisenberg octahedral chain with the intraplaquette and monomer-plaquette interactions are examined within a t…
Diversity of quantum ground states and quantum phase transitions of a spin-1/2 Heisenberg octahedral chain
Jozef Strecka, Johannes Richter, Oleg Derzhko +2
The spin-1/2 Heisenberg octahedral chain with regularly alternating monomeric and square-plaquette sites is investigated using various analytical and numerical methods: variational…
Enhanced magnetocaloric effect in a proximity of magnetization steps and jumps of spin-1/2 XXZ Heisenberg regular polyhedra
K. Karlova, J. Strecka, J. Richter
The magnetization process and adiabatic demagnetization of the antiferromagnetic spin-1/2 XXZ Heisenberg clusters with the shape of regular polyhedra (tetrahedron, octahedron, cube…
Thermodynamics of the frustrated - Heisenberg ferromagnet on the body-centered cubic lattice with arbitrary spin
P. Müller, J. Richter, A. Hauser +1
We use the spin-rotation-invariant Green's function method as well as the high-temperature expansion to discuss the thermodynamic properties of the frustrated spin- -$J_{…