scholarly journals Localized magnetic states in two-dimensional semiconductors

2018 ◽  
Vol 97 (23) ◽  
Author(s):  
A. S. Rodin ◽  
A. H. Castro Neto
Keyword(s):  
Two Dimensional ◽  
Magnetic States

scholarly journals Effect of electron correlations on the formation of spiral magnetic states in the two-dimensional t-t′ Hubbard model

JETP Letters ◽  
2013 ◽  
Vol 98 (3) ◽  
pp. 150-155 ◽  
Author(s):  
P. A. Igoshev ◽  
M. A. Timirgazin ◽  
A. K. Arzhnikov ◽  
V. Yu. Irkhin
Keyword(s):  
Hubbard Model ◽  
Two Dimensional ◽  
Electron Correlations ◽  
Magnetic States

scholarly journals К модельному описанию электронного спектра графеноподобных Янус-структур

2022 ◽  
Vol 64 (2) ◽  
pp. 277
Author(s):  
С.Ю. Давыдов
Keyword(s):  
Electronic Spectra ◽  
Function Method ◽  
Hexagonal Lattice ◽  
Tight Binding ◽  
Mechanical Deformation ◽  
Two Dimensional ◽  
Binding Theory ◽  
Effective Masses ◽  
Magnetic States ◽  
Analytical Expressions

Model of C – AB – D Janus structure as the compound formed by the interacting through atoms А and В dimers А – С and В – D, where А and В atoms are in the sites of two-dimensional hexagonal lattice and C and D atoms are on the opposite sides from AB list is proposed. In the scope of tight-binding theory and Green’s function method general equation for the dispersion low is obtained. The particular cases of C – AА – D и А – AB – В compounds are considered and analytical expressions for their electronic spectra is fulfilled. The effect of the external mechanical deformation on the band parameters including effective masses is examined. Problem of the magnetic states in Janus compounds is discussed.

Frozen magnetic states in quasi-two-dimensional Cr1/3−x NixTaS2 compounds with competing exchange interactions

1997 ◽  
Vol 39 (10) ◽  
pp. 1607-1611 ◽  
Author(s):  
G. A. Takzei ◽  
M. V. Gavrilenko ◽  
I. I. Sych ◽  
P. Esquinazi ◽  
L. M. Kulikov
Keyword(s):  
Exchange Interactions ◽  
Two Dimensional ◽  
Magnetic States

scholarly journals Multiple magnetic states of CoPc molecule on a two-dimensional layer of NbSe2

2021 ◽  
Vol 33 (20) ◽  
pp. 205802
Author(s):  
Ana M Montero ◽  
Filipe S M Guimarães ◽  
Samir Lounis
Keyword(s):  
Two Dimensional ◽  
Magnetic States

Ferromagnetism Switched by Hydrogenation in Layered MoS2

2013 ◽  
Vol 744 ◽  
pp. 345-348 ◽  
Author(s):  
Er Jun Kan ◽  
Ming Li
Keyword(s):  
First Principles ◽  
Spin Structure ◽  
Two Dimensional ◽  
Exchange Splitting ◽  
First Principles Calculations ◽  
Two Dimensional Materials ◽  
Ferromagnetic Character ◽  
Strong Exchange ◽  
Magnetic States ◽  
Layered Mos2

Ordered spin structure in two-dimensional materials is critical to the use of such materials in spintronics. Here, based on first-principles calculations, we demonstrated the existence of magnetic homogeneity in integrated two-dimensional structures. Our calculations show that hydrogenated MoS2 can be magnetized with a ferromagnetic character. The doped electrons in 4d orbitals of Mo atoms through hydrogenation lead to strong exchange splitting, which is the mechanism behind the transition of magnetic states. Given the recent progress in chemical control of two-dimensional materials, our results open a new way to produce two-dimensional spintronics.

scholarly journals Simulation of Two-Dimensional Images for Ion-Irradiation Induced Change in Lattice Structures and Magnetic States in Oxides by Using Monte Carlo Method

2021 ◽  
Vol 5 (2) ◽  
pp. 13
Author(s):  
Akihiro Iwase ◽  
Shigeru Nishio
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Method ◽  
Ion Irradiation ◽  
Ion Beam ◽  
Distribution Functions ◽  
Lattice Structures ◽  
Two Dimensional ◽  
The Monte Carlo Method ◽  
Magnetic States ◽  
Two Dimensional Images

A Monte Carlo method was used to simulate the two-dimensional images of ion-irradiation-induced change in lattice structures and magnetic states in oxides. Under the assumption that the lattice structures and the magnetic states are modified only inside the narrow one-dimensional region along the ion beam path (the ion track), and that such modifications are affected by ion track overlapping, the exposure of oxide targets to spatially random ion impacts was simulated by the Monte Carlo method. Through the Monte Carlo method, the evolutions of the two-dimensional images for the amorphization of TiO2, the lattice structure transformation of ZrO2, and the transition of magnetic states of CeO2 were simulated as a function of ion fluence. The total fractions of the modified areas were calculated from the two-dimensional images. They agree well with the experimental results and those estimated by using the Poisson distribution functions.

scholarly journals Спиральное магнитное упорядочение и переход металл--диэлектрик в модели Хаббарда на треугольной решeтке

2022 ◽  
Vol 64 (1) ◽  
pp. 79
Author(s):  
В.Ф. Гильмутдинов ◽  
М.А. Тимиргазин ◽  
А.К. Аржников
Keyword(s):  
Phase Separation ◽  
Magnetic Phase ◽  
Ferromagnetic Phase ◽  
Model Parameters ◽  
Two Dimensional ◽  
Van Hove Singularity ◽  
Hartree Fock ◽  
Cubic Lattices ◽  
Wide Range ◽  
Magnetic States

The magnetic phase diagrams of the two-dimensional Hubbard model for isotropic and anisotropic triangular lattices are constructed within the Hartree-Fock and slave boson approximations. The triangular lattice specific non-collinear and spiral magnetic states, as well as phase separation between them, are shown to be realized in a wide range of model parameters along with collinear magnetic states (stripe antiferromagnetic and ferromagnetic). Phase transitions of the first and second order are found, and the boundaries of the phase separation regions are determined. A comparison of the two approximations, Hartree-Fock and slave boson, shows that electronic correlations suppress magnetic states, the region of paramagnetism being expand, for values U/t>5. At the same time, when the Fermi level is near the van Hove singularity, electron correlations do not change the diagrams qualitatively, which is consistent with the previously obtained result for square and cubic lattices. The results are compared with the data available in the literature for other methods and approaches.

Spectrophotometric measurements of objective-prism spectra

1966 ◽  
Vol 24 ◽  
pp. 118-119
Author(s):  
Th. Schmidt-Kaler
Keyword(s):  
Progress Report ◽  
Two Dimensional ◽  
Objective Prism ◽  
Made In

I should like to give you a very condensed progress report on some spectrophotometric measurements of objective-prism spectra made in collaboration with H. Leicher at Bonn. The procedure used is almost completely automatic. The measurements are made with the help of a semi-automatic fully digitized registering microphotometer constructed by Hög-Hamburg. The reductions are carried out with the aid of a number of interconnected programmes written for the computer IBM 7090, beginning with the output of the photometer in the form of punched cards and ending with the printing-out of the final two-dimensional classifications.

Introductory paper

1966 ◽  
Vol 24 ◽  
pp. 3-5
Author(s):  
W. W. Morgan
Keyword(s):  
Line Intensity ◽  
Classification Scheme ◽  
Two Dimensional ◽  
Spectral Classification ◽  
Dimensional Array ◽  
Rr Lyrae ◽  
Metallic Line ◽  
Introductory Paper ◽  
Parameter Varying ◽  
Definition Of

1. The definition of “normal” stars in spectral classification changes with time; at the time of the publication of theYerkes Spectral Atlasthe term “normal” was applied to stars whose spectra could be fitted smoothly into a two-dimensional array. Thus, at that time, weak-lined spectra (RR Lyrae and HD 140283) would have been considered peculiar. At the present time we would tend to classify such spectra as “normal”—in a more complicated classification scheme which would have a parameter varying with metallic-line intensity within a specific spectral subdivision.

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