For the time being isotropic three-body exchange interactions are scarcely explored and mostly used as a tool for constructing various exactly solvable one-dimensional models, although, generally speaking, such competing terms in generic Heisenberg spin systems can be expected to support...

We report a new approach to measuring the dielectric behavior of thin films by means of differential interdigitated electrode (IDE) cells coupled with a dual-channel impedance measurement setup. The differential IDE cell consists of two identical IDE’s on a common substrate. With one IDE...

First-principles calculations of the electronic and optical properties of the bulk In<Subscript> x </Subscript>Ga<Subscript>1 − x </Subscript>N alloys are simulated within the framework of full-potential linearized augmented plane-wave (FP-LAPW) method. To this end, a sufficiently adequate approach, namely modified Becke-Johnson...</subscript></subscript>

Neutron diffraction measurement on the spin glass double perovskite Sr<Subscript>2</Subscript>FeCoO<Subscript>6</Subscript> reveals site disorder as well as Co<Superscript>3+</Superscript> intermediate spin state. In addition, multiple valence states of Fe and Co are confirmed through Mössbauer and X-ray photoelectron spectroscopy. The structural disorder and...</superscript></subscript></subscript>

We introduced the technique of coupling of Ising-like spins in symmetric molecules in a way analogous to coupling of “real” spins known from the theory of quantum spin momentum. This new basis provides more natural and in some cases easier way of capturing the spin crossover behaviour of a...

Excitations of Cooper pairs into non-condensed bound pairs are similar to excitations of true bosons out of the Bose-Einstein condensate. Using the Landau criterion of superfluidity we evaluate the critical current above which these pair-excitations would lead to a finite resistivity. The...

A two-dimensional Blume-Emery-Griffiths spin-1 model with spin-phonon interaction is introduced to investigate the thermodynamic properties of Prussian Blue Analogs and Spin-crossover materials. The quadrupolar interaction parameter is assumed to depend on the temperature in the form K = α k <Subscript>...</subscript>

The crystal and magnetic structures of Fe<Subscript>1.087</Subscript>Te have been studied by neutron powder diffraction in the temperature range from 1.7 to 80 K at pressures of  ≈0.4 and ≈1.2 GPa. No symmetry change of the tetragonal paramagnetic ambient pressure phase (space group P4/nmm) was observed for...</subscript>

The skutterudites are an excellent candidate for thermoelectric materials used in mechanic free heat pump and electric generator. Using the ab initio density functional theory we have calculated the electronic band structure and thermoelectric properties of skutterudite RuSb<Subscript>2</Subscript>Te. RuSb<Subscript>2</Subscript>Te compound...</subscript></subscript>