Results 61 to 70 of about 56,836 (316)

Phase transitions in a frustrated XY model with zig-zag couplings

, 1997
We study a new generalized version of the square-lattice frustrated XY model where unequal ferromagnetic and antiferromagnetic couplings are arranged in a zig-zag pattern.
%S. Teitel, B. Berge, D.H. Lee, E. Granato, E. Granato, E. Granato, E. Granato, E. Granato, E. Granato, E. Granato, Enzo Granato, G. André, G. Grest, G. Ramirez-Santiago, G. Ramirez-Santiago, H. Eikmans, H. Kawamura, J. Lee, J. Lee, J. Villain, J.M. Thijssen, K. Binder, M. Benakli, M. Gabay, M. Yosefin, M.P. Nightingale, M.Y. Choi, Mourad Benakli, P. Olsson, S. Miyashita, S.E. Korshunov, T. Garel, T.C. Halsey, W.-M. Zhang, W.M. Saslow, Y.M.M. Knops   +35 more
core   +1 more source

Thermal Ising transition in two-dimensional SU(3) Fermi lattice gases with population imbalance

Physical Review Research, 2023
We focus on three-component SU(3) Fermi gases loaded into a square optical lattice, with population imbalance between one component and the others. At strong coupling the system is described by the SU(3) Heisenberg model with an external field that ...
Hayato Motegi, Giacomo Marmorini, Nobuo Furukawa, Daisuke Yamamoto   +3 more
doaj   +1 more source

Some Recent Results on Pair Correlation Functions and Susceptibilities in Exactly Solvable Models

, 2006
Using detailed exact results on pair-correlation functions of Z-invariant Ising models, we can write and run algorithms of polynomial complexity to obtain wavevector-dependent susceptibilities for a variety of Ising systems.
Au-Yang H, Au-Yang H, Au-Yang H, Au-Yang H, Au-Yang H, Baxter R J, Baxter R J, Caselle M, Gummelt P, Helen Au-Yang, Jacques H H Perk, Jin B-Q, Kong X-P   +12 more
core   +1 more source

Unusual scaling for two-dimensional avalanches: Curing the faceting and scaling in the lower critical dimension

Physical Review Research, 2019
The nonequilibrium random-field Ising model is well studied, yet there are outstanding questions. In two dimensions, power-law scaling approaches fail and the critical disorder is difficult to pin down.
L. X. Hayden, Archishman Raju, James P. Sethna   +2 more
doaj   +1 more source

Ising nematic fluid phase of hard-core dimers on the square lattice

, 2014
We present a model of classical hard-core dimers on the square lattice that contains an Ising nematic phase in its phase diagram. We consider a model with an attractive interaction for parallel dimers on a given plaquette of the square lattice and an ...
Charrier, Daniel, Fradkin, Eduardo, Papanikolaou, Stefanos   +2 more
core   +1 more source

Free-fermion approach to the partition function zeros: Special boundary conditions and product form of solution

Physical Review Research
Partition function zeros are powerful tools in understanding critical behavior. In this paper, we present results of the Fisher zeros of two-dimensional Ising models, in the framework of free-fermion eight-vertex model.
De-Zhang Li, Xin Wang
doaj   +1 more source

Bond diluted Ising model in 2D

EPJ Web of Conferences, 2013
The bond diluted Ising model is studied by Monte Carlo method. The simulation is carried out on a two dimensional square lattice with missing bonds and free boundary conditions.
Bouamrane Rachid, Zergoug Ismail, Addi Djamel   +2 more
doaj   +1 more source

Continuous similarity transformation for critical phenomena: Easy-axis antiferromagnetic XXZ model

Physical Review Research, 2023
We apply continuous similarity transformations (CSTs) to the easy-axis antiferromagnetic XXZ model on the square lattice. The CST flow equations are truncated in momentum space by the scaling dimension d so that all contributions with d≤2 are taken into ...
Matthias R. Walther, Dag-Björn Hering, Götz S. Uhrig, Kai P. Schmidt   +3 more
doaj   +1 more source

An Ultra‐Robust Memristor Based on Vertically Aligned Nanocomposite with Highly Defective Vertical Channels for Neuromorphic Computing

Advanced Functional Materials, EarlyView.
An ultra‐robust memristor based on SrTiO3‐CeO2 (S‐C) vertically aligned nanocomposite (VAN) achieving exceptional endurance of 1012 switching cycles via interface engineering. Artificial neural networks (ANNs) integrated with S‐C VAN memristors exhibit high training accuracy across multiple datasets.
Zedong Hu, Hongyi Dou, Jeremy B. Gan, Cun Li, Xuanyu Sheng, Juanjuan Lu, Abhijeet Choudhury, Jialong Huang, Yizhi Zhang, Zhongxia Shang, Ye Cao, Xinghang Zhang, Haiyan Wang   +12 more
wiley   +1 more source

Topological phases of shaken quantum Ising lattices

New Journal of Physics, 2016
The quantum compass model consists of a two-dimensional square spin lattice where the orientation of the spin–spin interactions depends on the spatial direction of the bonds.
Samuel Fernández-Lorenzo, Juan José García-Ripoll, Diego Porras   +2 more
doaj   +1 more source