Reversibility of magnetic field driven transition from electronic phase separation state to single-phase state in manganites: A microscopic view

2017 ◽  
Vol 96 (19) ◽  
Author(s):  
Hao Liu ◽  
Lingfang Lin ◽  
Yang Yu ◽  
Hanxuan Lin ◽  
Yinyan Zhu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Separation ◽  
Single Phase ◽  
Phase State ◽  
Electronic Phase Separation ◽  
Single Phase State ◽  
Electronic Phase

scholarly journals Electronic phase separation and magnetic-field-induced phenomena in molecular multiferroic (ND4)2FeCl5·D2O

2018 ◽  
Vol 98 (5) ◽  
Author(s):  
W. Tian ◽  
H. B. Cao ◽  
Amanda J. Clune ◽  
Kendall D. Hughey ◽  
Tao Hong ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Separation ◽  
Electronic Phase Separation ◽  
Electronic Phase

scholarly journals Optical Control of Superlattices States Formed Due to Electronic Phase Separation in Multiferroic Eu0.8Ce0.2Mn2O5

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1664
Author(s):  
Viktoriya Sanina ◽  
Boris Khannanov ◽  
Evgenii Golovenchits
Keyword(s):  
Magnetic Field ◽  
Phase Separation ◽  
Optical Pumping ◽  
Semiconductor Heterostructures ◽  
Optical Control ◽  
Self Organization ◽  
Electronic Phase Separation ◽  
Electronic Phase ◽  
Multiferroic Heterostructures ◽  
Crystal Volume

The effect of optical pumping and magnetic field on properties of the electronic phase separation regions, which are the multiferroic semiconductor heterostructures in the form of superlattices, have been studied in Eu0.8Ce0.2Mn2O5. These superlattices are formed due to self-organization in a dielectric crystal matrix as a result of the competing internal interactions balance and occupy a small crystal volume. The dynamical equilibrium states of superlattices are initially formed during cycling of as-grown samples in a magnetic field. The superlattices in such states are ferromagnetic and electrically neutral. Sets of ferromagnetic resonances were observed from individual layers of superlattices. Their features give rise information on properties of these layers and of a superlattice as a whole. The differences in the parameters of these resonances were due to different distributions of Mn3+ and Mn4+ ions in individual superlattices layers. It has been found that optical pumping having different powers allows us to control of multiferroic properties of superlattices layers by changing their magnetic and electric properties. It is shown that, under certain conditions, it is possible to significantly increase the temperatures at which multiferroic heterostructures exist.

Methods of Stabilization of Gas Condensates

2018 ◽  
Author(s):  
Ibukun Makinde
Keyword(s):  
Single Phase ◽  
Phase State ◽  
Liquid Mixtures ◽  
Gas Condensate ◽  
Liquid Hydrocarbons ◽  
Light Hydrocarbons ◽  
Natural Gases ◽  
Gas Condensates ◽  
Single Phase State

Gas condensates are liquid mixtures of high-boiling hydrocarbons of various structures, separated from natural gases during their production at gas condensate fields. When transporting gas through pipelines, the following gas quality conditions should be met:i.During transportation, gases should not cause corrosion of pipelines, fittings, instruments, etc.ii.The quality of the gas must ensure its transportation in a single-phase state i.e., liquid hydrocarbons, gas condensates and hydrates should not form in the pipelines.In order for gas condensates to meet the above-mentioned quality conditions during storage or transportation, they must be stabilized. Gas condensate stabilization is the process of “boiling off” light hydrocarbons from the condensate that would otherwise increase the vapor pressure when conditions are fluctuating.

scholarly journals Two-component electronic phase separation in the doped Mott insulator Y1−xCaxTiO3

2021 ◽  
Vol 104 (4) ◽  
Author(s):  
S. Hameed ◽  
J. Joe ◽  
D. M. Gautreau ◽  
J. W. Freeland ◽  
T. Birol ◽  
...  
Keyword(s):  
Phase Separation ◽  
Mott Insulator ◽  
Electronic Phase Separation ◽  
Electronic Phase ◽  
Two Component ◽  
Doped Mott Insulator

scholarly journals Low-temperature dielectric anomaly arising from electronic phase separation at the Mott insulator-metal transition

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
A. Pustogow ◽  
R. Rösslhuber ◽  
Y. Tan ◽  
E. Uykur ◽  
A. Böhme ◽  
...  
Keyword(s):  
Phase Separation ◽  
Mean Field Theory ◽  
Mean Field ◽  
Coulomb Repulsion ◽  
Mott Insulator ◽  
Electronic Phase Separation ◽  
First Order Phase Transition ◽  
Electronic Phase ◽  
Insulator Metal Transition ◽  
First Order Phase

AbstractCoulomb repulsion among conduction electrons in solids hinders their motion and leads to a rise in resistivity. A regime of electronic phase separation is expected at the first-order phase transition between a correlated metal and a paramagnetic Mott insulator, but remains unexplored experimentally as well as theoretically nearby T = 0. We approach this issue by assessing the complex permittivity via dielectric spectroscopy, which provides vivid mapping of the Mott transition and deep insight into its microscopic nature. Our experiments utilizing both physical pressure and chemical substitution consistently reveal a strong enhancement of the quasi-static dielectric constant ε1 when correlations are tuned through the critical value. All experimental trends are captured by dynamical mean-field theory of the single-band Hubbard model supplemented by percolation theory. Our findings suggest a similar ’dielectric catastrophe’ in many other correlated materials and explain previous observations that were assigned to multiferroicity or ferroelectricity.

Electronic irradiation of TlInSxSe2−x (x = 1): Morphology, structure and raman scattering

2021 ◽  
Author(s):  
M. Yu. Tashmetov ◽  
F. K. Khallokov ◽  
N. B. Ismatov ◽  
I. I. Yuldashova ◽  
S. Kh. Umarov
Keyword(s):  
Surface Morphology ◽  
Single Crystal ◽  
Single Phase ◽  
Phase State ◽  
Monoclinic Structure ◽  
Average Value ◽  
Single Phase State ◽  
Before And After ◽  
Electronic Irradiation ◽  
The Difference

It is shown that the replacement of a part of sulfur atoms with selenium atoms in a TlInS2 single crystal stimulates the formation of a single-phase state with a monoclinic structure (space group [Formula: see text]/[Formula: see text] in TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]). Irradiation with 2 MeV electrons and a fluence of [Formula: see text] electron/cm2 of powder TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]) leads to an increase in the crystallite size from 56.5 nm to 65 nm, which is most likely associated with a decrease in the interface. The difference between the surface morphology of the synthesized TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]) single crystal and the surface morphology of the TlInS2 single crystal is established, which consists in a decrease in the height and width of the roughness in TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]). Irradiation of a TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]) single crystal with electrons with a fluence of [Formula: see text] electron/cm2 does not lead to a change in the height of the tubercle on its surface, and the average value of its width increases more than ten-fold. The identity of the peaks in the Raman spectra of the TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]) single crystal before and after its irradiation with electrons with an energy of 2 MeV and upto a fluence of [Formula: see text] electron/cm2, along with the absence of a shift of the peaks, indicates the radiation resistance of the TlInS[Formula: see text]Se[Formula: see text] ([Formula: see text]) single crystal.

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