scholarly journals Low-energy excitations of two-dimensional diluted Heisenberg quantum antiferromagnets

2010 ◽  
Vol 81 (5) ◽  
Author(s):  
Ling Wang ◽  
Anders W. Sandvik
Keyword(s):  
Low Energy ◽  
Two Dimensional ◽  
Quantum Antiferromagnets

scholarly journals Complex magnetism of the two-dimensional antiferromagnetic Ge2F: from a Néel spin-texture to a potential antiferromagnetic skyrmion

RSC Advances ◽  
2021 ◽  
Vol 11 (15) ◽  
pp. 8654-8663
Author(s):  
Fatima Zahra Ramadan ◽  
Flaviano José dos Santos ◽  
Lalla Btissam Drissi ◽  
Samir Lounis
Keyword(s):  
Density Functional Theory ◽  
Magnetic Properties ◽  
Density Functional ◽  
Low Energy ◽  
Two Dimensional ◽  
Functional Theory ◽  
2D Material ◽  
Energy Models ◽  
Spin Texture

Based on density functional theory combined with low-energy models, we explore the magnetic properties of a hybrid atomic-thick two-dimensional (2D) material made of germanene doped with fluorine atoms in a half-fluorinated configuration (Ge2F).

scholarly journals Bra-ket wormholes in gravitationally prepared states

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Yiming Chen ◽  
Victor Gorbenko ◽  
Juan Maldacena
Keyword(s):  
Hyperbolic Space ◽  
Path Integral ◽  
Flat Space ◽  
Low Energy ◽  
Two Dimensional ◽  
De Sitter ◽  
Euclidean Case ◽  
Fine Grained ◽  
Entropy Formula ◽  
First Case

Abstract We consider two dimensional CFT states that are produced by a gravitational path integral.As a first case, we consider a state produced by Euclidean AdS2 evolution followed by flat space evolution. We use the fine grained entropy formula to explore the nature of the state. We find that the naive hyperbolic space geometry leads to a paradox. This is solved if we include a geometry that connects the bra with the ket, a bra-ket wormhole. The semiclassical Lorentzian interpretation leads to CFT state entangled with an expanding and collapsing Friedmann cosmology.As a second case, we consider a state produced by Lorentzian dS2 evolution, again followed by flat space evolution. The most naive geometry also leads to a similar paradox. We explore several possible bra-ket wormholes. The most obvious one leads to a badly divergent temperature. The most promising one also leads to a divergent temperature but by making a projection onto low energy states we find that it has features that look similar to the previous Euclidean case. In particular, the maximum entropy of an interval in the future is set by the de Sitter entropy.

Corneal surgery by two-dimensional scanning of a low-energy excimer laser beam

1994 ◽  
Author(s):  
Angela Unkroth ◽  
Karin Pachomis ◽  
Jens-Uwe Walther ◽  
D. Zimare
Keyword(s):  
Laser Beam ◽  
Excimer Laser ◽  
Low Energy ◽  
Two Dimensional ◽  
Corneal Surgery

PHOTOLUMINESCENCE OF IMPURITY-BOUND EXCITONS AND TRIONS IN MAGNETIC FIELDS

2007 ◽  
Vol 21 (08n09) ◽  
pp. 1558-1562
Author(s):  
ARKADIUSZ WÓJS ◽  
LESZEK BRYJA ◽  
ANNA GŁADYSIEWICZ ◽  
JAN MISIEWICZ ◽  
MAREK POTEMSKI
Keyword(s):  
Magnetic Fields ◽  
Low Energy ◽  
Numerical Calculations ◽  
Two Dimensional ◽  
Recombination Spectrum

Recombination spectrum of excitons and positive trions is studied by two-beam magneto-photoluminescence of a two-dimensional hole gas. For acceptor-bound trions a low-energy cyclotron replica is observed, corresponding to a hole shake-up process. The experiment is supplemented by realistic numerical calculations, allowing for identification of individual transitions and connecting the splitting of the shake-up line directly with the hole mass.

scholarly journals ONE-ELECTRON SPECTRAL WEIGHT OF DOPED MOTT INSULATORS IN GAUGE FIELD THEORY APPROACH

1996 ◽  
Vol 10 (27) ◽  
pp. 3727-3736
Author(s):  
H.C. LEE
Keyword(s):  
Field Theory ◽  
Gauge Field ◽  
Spectral Weight ◽  
Low Energy ◽  
Vertex Correction ◽  
Gauge Field Theory ◽  
Mott Insulators ◽  
Theory Approach ◽  
Two Dimensional ◽  
Second Order Perturbation Theory

The electron spectral weight of doped Mott insulators based on the two-dimensional slave boson gauge field theory is studied. The vertex correction with static gauge field is calculated in the second order perturbation theory. The vertex correction is found to be singular at low energy and requires non-perturbative treatments.

Anatase TiO2-based two-dimensional electron gases generated by low-energy argon-ion irradiation

2018 ◽  
Vol 112 (24) ◽  
pp. 241601
Author(s):  
Xi Yan ◽  
Hongrui Zhang ◽  
Hui Zhang ◽  
Tahira Khan ◽  
Jine Zhang ◽  
...  
Keyword(s):  
Ion Irradiation ◽  
Anatase Tio2 ◽  
Low Energy ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Electron Gases ◽  
Argon Ion
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