scholarly journals Effect of spin-orbital interaction on continuous and jumpwise reversal magnetization in [Mn(II)(HL)(H2O)][Mn(III)(CN)6]·2H2O molecular ferrimagnet

2018 ◽  
Vol 185 ◽  
pp. 04016
Author(s):  
Marina Kirman ◽  
Roman Morgunov
Keyword(s):  
Time Series ◽  
Fourier Transform ◽  
Orbit Interaction ◽  
Orbital Interaction ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Spin Orbital ◽  
Noise Statistic ◽  
Distribution Of Magnetization ◽  
Spin Orbital Interaction

Magnetic jumps were revealed during the magnetization reversal of [Mn(II)(HL)(H2O)][Mn(III)(CN)6]·2H2O molecular ferrimagnet. Amplitudes of the jumps were 0.01 – 0.1 % of the saturation magnetization. Fourier transform of the time series of jumps magnetization indicates that frequency spectrum is close to the white noise. Statistic distribution of the jumps versus time reveals the appearance of the most jumps at the beginning of the demagnetization. Effect of spin-orbit coupling on statistical distribution of magnetization jumps was considered by comparison of two compounds with different single ion anisotropies. The increase of spin-orbit interaction leads to the decrease of power of spectral density of magnetization jumps.

Enhanced thermoelectric properties of polycrystalline CuCrS2-xSex (x = 0, 0.5, 1.0, 1.5, 2) samples by replacing chalcogens and sintering

2021 ◽  
Author(s):  
Anatoly Romanenko ◽  
Galina Chebanova ◽  
Ivan Katamanin ◽  
Michael Drozhzhin ◽  
Sofia Artemkina ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Grain Boundaries ◽  
Thermoelectric Properties ◽  
Orbit Interaction ◽  
Orbital Interaction ◽  
Spin Orbit ◽  
Spin Orbital ◽  
Spin Orbit Interaction ◽  
Spin Orbital Interaction ◽  
Strong Spin

Abstract The optimization of thermoelectric properties of the CuCrS2-xSex (x = 0, 0.5, 1.0, 1.5, 2) samples was achieved by substitution in anionic sublattice and sintering at high temperature. The maximum power factor PF ~ 0.3 mW/m•K^2 among a series of samples with chalcogen substitution was obtained for CuCrS0.5Se1.5 sample at T=300 K. The sintering made it possible to obtain the maximum value PF ~ 2.1 mW/m•K2 for CuCrSe2 sample. This is due to a more than threefold increase in the thermoelectric power S(T) in CuCrSe2 sample with a spin-orbital interaction in comparison with CuCrS0.5Se1.5 sample with the same optimal electrical conductivity σ (σ300K ~ 100 S/cm), but without spin-orbital interaction. In CuCrSe2 sample, sintering effectively reduced the s to an optimal value, suppressed of the magnetic phase transition in the range of 50-100 K, and the weak localization were replaced by weak antilocalization indicating the appearance of strong spin-orbit interaction below 20 K. As a result, an additional contribution to the S(T) appeared due to the filtration of current carriers caused by the strong spin-orbit interaction. The effect of grain boundaries on the properties σ(T) and S(T) of the samples was investigated. It was established that polycrystalline samples with a high sulfur content were low-conductivity materials consisting of high-conductivity crystallites with the charge carriers concentration n ~ 1020 cm-3 separated by low-conductivity grain boundaries with fluctuation-induced tunneling conductivity. Both the replacement of sulfur with selenium and sintering led to a decrease in the energy barriers connecting grain boundaries. Selenium-dominated samples (CuCrS0.5Se1.5 and CuCrSe2) had high electrical conductivity with negligible energy barriers between grain boundaries. Logarithmic quantum corrections to the electrical conductivity was observed below 20 K, which indicated a quasi-two-dimensional electron transport in these samples.

scholarly journals Electronic properties of orthorhombic InI and TlI crystals taking into account the quasiparticle corrections and spin-orbit interaction

2020 ◽  
Vol 21 (4) ◽  
pp. 695-699
Author(s):  
S.V. Syrotyuk
Keyword(s):  
Electronic Properties ◽  
Orbit Interaction ◽  
Energy Spectra ◽  
Orbital Interaction ◽  
Orthorhombic Structure ◽  
Gw Approximation ◽  
Spin Orbital ◽  
Exchange Correlation ◽  
Experimental Values ◽  
Spin Orbital Interaction

The electronic properties of InI and TlI crystals of an orthorhombic structure with a space group Cmcm are studied. Calculations of electron properties are performed on the basis of the projector augmented waves by means of the ABINIT program. Total and partial densities of electronic states are calculated. Electron energy spectra are found with the exchange-correlation functional GGA, without and taking into account the spin-orbital interaction. It was found that the bandgap of the InI, obtained without spin-orbital interaction, is less than the experimental value by 38%, and by 42%, taking into account the latter. For the TlI crystal, the corresponding values are 27% and 39%. The bandgap found from the quasiparticle equation in the GW approximation exhibits an excellent agreement with the experimental values for both crystals.

scholarly journals Quantum Effects of Non-Ballistic Transport in Films Based on Compound PbSnAgTe

2017 ◽  
Vol 18 (4) ◽  
pp. 399-403
Author(s):  
O. B. Kostyuk ◽  
M. A. Ruvinskii ◽  
E. V. Ivakin ◽  
M. Yu. Pereginchuk
Keyword(s):  
Magnetic Field ◽  
Ballistic Transport ◽  
Weak Localization ◽  
Quantum Effects ◽  
Orbital Interaction ◽  
Spin Orbit ◽  
Polycrystalline Films ◽  
Spin Orbital ◽  
Magnetic Conductivity ◽  
Spin Orbital Interaction

Based on the theory of weak localization, taking into account the mechanism of spin-orbit scattering, the patterns of change in the magnetic conductivity of films PbSnAgTe are considered. The dependences of the magnetoresistance of PbSnAgTe films in a magnetic field perpendicular to the surface of the film are studied. It is shown that for polycrystalline films on mica-muscovite substrates, the time of spin-orbital interaction depends on the composition and may change the sign of the magnetoresistance.

scholarly journals How spin-orbital entanglement depends on the spin-orbit coupling in a Mott insulator

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Dorota Gotfryd ◽  
Ekaterina M. Pärschke ◽  
Jiří Chaloupka ◽  
Andrzej M. Oleś ◽  
Krzysztof Wohlfeld
Keyword(s):  
Mott Insulator ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Spin Orbital

scholarly journals Photonic Spin Hall Effect: Contribution of Polarization Mixing Caused by Anisotropy

2020 ◽  
Vol 2 (4) ◽  
pp. 489-500
Author(s):  
Maxim Mazanov ◽  
Oleh Yermakov ◽  
Ilya Deriy ◽  
Osamu Takayama ◽  
Andrey Bogdanov ◽  
...  
Keyword(s):  
Hall Effect ◽  
Spin Hall Effect ◽  
Optical Systems ◽  
Quarter Wave Plate ◽  
Orbital Interaction ◽  
Spin Orbital ◽  
Simplified Approach ◽  
Beam Incident ◽  
Quarter Wave ◽  
Spin Orbital Interaction

Spin-orbital interaction of light attracts much attention in nanophotonics opening new horizons for modern optical systems and devices. The photonic spin Hall effect or Imbert-Fedorov shift takes a special place among the variety of spin-orbital interaction phenomena. It exhibits as a polarization-dependent transverse light shift usually observed in specular scattering of light at interfaces with anisotropic materials. Nevertheless, the effect of the polarization mixing caused by anisotropy on the Imbert-Fedorov shift is commonly underestimated. In this work, we demonstrate that polarization mixing contribution cannot be ignored for a broad range of optical systems. In particular, we show the dominant influence of the mixing term over the standard one for the polarized optical beam incident at a quarter-wave plate within the paraxial approximation. Moreover, our study reveals a novel contribution with extraordinary polarization dependence not observable within the simplified approach. We believe that these results advance the understanding of photonic spin Hall effect and open new opportunities for spin-dependent optical phenomena.

ROTATIONAL ENERGY LEVELS OF STATES AND INTENSITIES IN TRANSITIONS: APPLICATIONS TO SOME HEAVIER HYDRIDES

1967 ◽  
Vol 45 (8) ◽  
pp. 2581-2596 ◽  
Author(s):  
I. Kopp ◽  
J. T. Hougen
Keyword(s):  
Energy Levels ◽  
Relative Size ◽  
Orbit Interaction ◽  
Spin Splitting ◽  
Energy Separation ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
First Approximation ◽  
Coupling Case ◽  
Π State

Three topics concerning [Formula: see text] states are discussed: (1) The magnitude of the Ω-type splitting in a [Formula: see text] state arising from a Σ state of even multiplicity has been considered and is found to be given to a first approximation by [Formula: see text]. This result leads to the introduction and discussion of a coupling case (a′) for Σ states. (2) Expressions for the Λ-type splitting in a 2Π state and the spin splitting in a 2Σ state (caused by their mutual interaction via spin-orbit coupling) are derived. These expressions are valid when the rotational intervals are small compared to both the spin-orbit interaction and the 2Π−2Σ energy separation, but do not place any restriction on the relative size of the latter two quantities. (3) Branch intensity expressions are presented which apply to any [Formula: see text] transition in which the [Formula: see text] states are not contaminated (due to uncoupling phenomena) by states having a different value of Ω.

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