А.Р. Нурмухаметов, К.В. Васин, М.В. Еремин. О происхождении гигантских скачков электрической поляризации при фазовых переходах в Fe2Mo3O8.

Предложена микроскопическая теория статической магнитоэлектрической связи в Fe2Mo3O8. Расситаны уровни энер гии и волновые функции нижайших состояний Fe2+ (3d9) в тетраэдрическом и октаэдрическом окружении, а также па- раметры взаимодействия 3d-электро нов с электрическим полем.

K. Vasin: Submillimeter optical properties of Fe2Mo3O8 antiferromagnet in magnetic fields

Submillimeter optical properties of Fe2Mo3O8 antiferromagnet in magnetic fields.

Transformation of orbital moment and spin-orbit interaction induced by covalent bonding of 3d electrons with ligands

The effects of covalent metal-ligand bonds in the compounds of 3d ions in nondegenerate orbital states are well described previously. In this work, the modification of spin-orbit coupling operators and the orbital magnetic moment of orbitally degenerate states caused by covalent bonds is disc

О происхождении невзаимности в спектре FeZnMo3O8

Явление невзаимности (nonreciprocal directional dichroism) в терегерцевом спектре поглощения объясняется интерференцией магнитных и электрических дипольных переходов между уровнями энергии ионов Fe2+.

Mikhail Eremin (Institute of Physics, Kazan Federal University, Russia), K.V. Vasin, F.P. Nurmikhametov ?Theory of crystal fields and excitation spectra (optical and terahertz) in Fe2Mo3O8? (invited talk)

The energy levels and wave functions of Fe2+ (5D) ions in Fe2Mo3O8 have been calculated using crystal field theory. The interaction parameters of copper 3d-electrons with the electrical field are evaluated using experimental data about absorption coefficients. The origin of the magnetoelectic coupli

MAGNETOELECTRIC COUPLING IN FeCr2O4, FeV2O4, DyCrO4 and Fe2Mo3O8

Magnetoelectric coupling in FeCr2O4, FeV2O4, DyCrO4 and Fe2Mo3O8 is anomalously large. Its origin is explained by the combined action of odd crystal fields, spin-orbit and superexchange interactions. The large linear magnetoelectric effect in an external magnetic field in the collinear antiferromagn

Asymmetry of superconducting gap dispersion in e- and h- doped cuprates.

The dependence of the superconducting gap on the wave vector contains important information on the nature of the Cooper-pairing mechanism. The measurements with increasing accuracy provide grounds for the inclusion of higher harmonics with the d wave symmetry in the gap dispersion for both hole- and

presentation 'Asymmetry of superconducting gap dispersion in e- and h- doped cuprates.'

Magnetoelectric coupling in noncollinear ferrimagnets

The analytical expressions for the magnetoelectric coupling derived using perturbation theory, combining the action of odd crystal field, spin?orbit and exchange interactions. Mainly I will focus on FeV2O4 and LiCu2O2 .

presentation 'Magnetoelectric coupling in noncollinear ferrimagnets'

Toward the Theory of the Coupling Sins and Orbital Moments with Electric Field

I revisit the theory of interaction of the spins and orbital moments with electric field focusing on the transition metal compounds without inversion symmetry. As specific examples, I will discuss the terahertz absorption spectrum of Fe2+ in tetrahedral environment, optical absorption of Cu2+ ions

presentation

New Materials and New Tasks

A search for novel promising materials is one of the most important areas of modern science. The systems with orbital degenerate ground states especially attract much more attention and in focus of present communication.

presentation 'New Materials and New Tasks'

Eremin, M.V. Asymmetry of critical temperatures in e-and h- doped cuprates//SUPERSTRIPES 2017/ Quantum in Complex Matter: Superconductivity, Magnetism and Ferroelectricity, June 4-10, 2017 Ischia, Italy. Abstract book >.-P. 128-129

Asymmetry of critical temperatures in e-and h- doped cuprates.

Temperature dependence of penetration depth in presence of momentum dependent CDW and superconducting order parameters

Magnetic Susceptibility of Hole and Electron-doped HTSC Cuprates

Interplay between Local and Itinerant Components in Spin Response of HTSC

Об анизотропии дисперсии магнитных возбуждений в дырочно допированных купратах