Spin 1/2 dimer chain specific heat
WebWe present numerical and analytical results for the thermodynamical properties of the spin-1/2 Heisenberg chain at arbitrary external magnetic field. Special emphasis is placed on … WebFor example, for an Ising model with one spin, H= hs 1, the partition function is Z= Tr e h 0 0 e h = e h+ e h (19) Now consider two spins, under periodic B.C., H(s 1;s 2) = Js 1s 2 Js 2s …
Spin 1/2 dimer chain specific heat
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WebJun 9, 2010 · We describe a Peierls dimerization which occurs in ferromagnetic spin chains at finite temperature, within the modified spin-wave theory. Usual spin-wave theory is … WebThe investigated quantum spin system exhibits at zero temperature fractional plateaux at 1/4 and 1/2 of the saturation magnetization and it has a highly degenerate ground state at …
WebAug 5, 2011 · Abstract Heat-capacity and susceptibility measurements have been performed on the diluted spin dimer compound Ba₃ (Mn 1-x V x )₂O₈. The parent compound Ba₃Mn₂O₈ is a spin dimer system based on pairs of antiferromagnetically coupled S=1, 3d² Mn⁵⁺ ions such that the zero-field ground state is a product of singlets. WebMar 22, 2024 · The spin-1/2 Heisenberg antiferromagnet on the frustrated diamond-decorated square lattice is known to feature various zero-field ground-state phases, consisting of extended monomer-dimer and dimer-tetramer ground states as well as a ferrimagnetic regime.
WebJan 28, 2024 · Abstract: Quantum spin-1/2 antiferromagnetic Heisenberg trimerized chain with strong intradimer and weak monomer-dimer coupling constants is studied using the … WebOct 30, 2006 · The specific heat of S = 1 / 2 frustrated diamond-spin chain has been examined by means of the Green's function theory combined with the Jordan–Wigner transformation, and the particular emphasis is laid on the investigation of the effect of geometric frustration, which is generated by the competition between the exchange …
WebDec 24, 2024 · Abstract Magnetic susceptibility, magnetization, and specific-heat measurements under both in-plane and out-of-plane field on K2Co2(SeO3)3 single crystals are reported. The Co dimers in this compound, which are made from face-sharing effective spin-1/2 CoO6 octahedra, sit on the corners of a geometrically frustrating triangular planar …
WebMay 1, 2024 · Consequently, the spin-1 2 Heisenberg octahedral chain can be described by the one-dimensional lattice-gas model of hard-core monomers given by the Hamiltonian H … jon jones wife leavesWebMay 1, 2024 · Consequently, the spin- 1 2 Heisenberg octahedral chain can be described by the one-dimensional lattice-gas model of hard-core monomers given by the Hamiltonian H = E FM 0 − h ( 2 N + ∑ j = 1 N S 1, j z) − μ 1 ∑ j = 1 N n 1, j − μ 2 ∑ j = 1 N n 2, j, where n 1, j = 0 1 and n 2, j = 0 1 denote the respective occupation numbers of two kinds of the … how to install la vegetation mod five mWebOct 1, 2024 · Very recently, the magnetic properties and the specific heat in a spin-1/2 Ising–Heisenberg butterfly-shaped chain have been investigated, [ 46] however, up to now the thermal entanglement properties in the Ising–Heisenberg butterfly-shaped spin chain model has not been discussed yet. how to install laundry tubWebApr 10, 2024 · A robust interplay of intra-dimer and inter-dimer (both intra-chain and inter-chain) contacts has been used to explain the long-range antiferromagnetic ordering. ... entire spin entropy of Mn 2 ... how to install lava hd 8008 4k tv antennaWebFIG. 4. Magnetic phase diagram of Ba3Mn2O8. The circles are the positions of the peaks and shoulders in the specific heat at constant magnetic fields. The diamonds are the positions of the peaks and shoulders in the specific heat measured as a function of the magnetic field, while the current for the reservoir heater was held constant. The lines are … jon jones wins ufc heavyweightWebDec 1, 2024 · Spinon continuum and spin-singlet dimer excitations are observed in the inelastic neutron scattering spectra, which is in excellent agreement with a theoretical … how to install lava rockWebMagnetic susceptibility and specific heat versus temperature measurements on polycrystalline samples of Sr3Cr2O8 and the isostructural, nonmagnetic compound Sr3V2O8 are reported. A Curie-Wiess fit to the high-temperature susceptibility data for Sr3Cr2O8 indicates that the Cr atoms are in the rare Cr^5+ (Spin S = 1/2) valence state as expected … jon jones wife and kids