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Recently, it has been rigorously verified that several one-dimensional (1D) spin models may exhibit a peculiar pseudo-transition accompanied with anomalous response of thermodynamic quantities in a close vicinity of pseudo-critical…

统计力学 · 物理学 2020-01-08 Onofre Rojas , Jozef Strečka , Oleg Derzhko , S. M. de Souza

The site-decorated Ising model is introduced to advance the understanding and experimental realization of the recently discovered one-dimensional (1D) finite-temperature ultranarrow phase crossover in an external magnetic field, while…

统计力学 · 物理学 2026-03-12 Weiguo Yin

We construct a two-dimensional (2D) lattice model that is argued to realize a gapped chiral spin liquid with (Ising) non-Abelian topological order. The building blocks are spin-1/2 two-leg ladders with $SU(2)$-symmetric spin-spin…

强关联电子 · 物理学 2017-12-19 Po-Hao Huang , Jyong-Hao Chen , Adrain E. Feiguin , Claudio Chamon , Christopher Mudry

I demonstrate a pairing mechanism of dopants in a magnetic lattice, emerging from the underlying high-temperature disorder of the spins. The effect is demonstrated in a mixed-dimensional model, where dopants travel along a two-leg ladder,…

强关联电子 · 物理学 2025-02-14 K. Knakkergaard Nielsen

PdFe/Ir(111) has attracted tremendous attention for next-generation spintronics devices due to existence of magnetic skyrmions with the external magnetic field. Our density functional theoretical calculations in combination with spin…

材料科学 · 物理学 2024-07-17 Banasree Sadhukhan , Anders Bergman , Johan Hellsvik , Patrik Thunström , Anna Delin

Motivated by the recent inelastic neutron scattering (INS) measurements in the iron pnictides which show a strong anisotropy of spin excitations in directions perpendicular and parallel to the ordering wave-vector even above the magnetic…

强关联电子 · 物理学 2015-10-19 Patricia Bilbao Ergueta , Andriy H. Nevidomskyy

Spin crossover (SCO) molecules are promising bi-stable magnetic switches with applications in molecular spintronics. However, little is known about the switching effects of a single SCO molecule when it is confined between two metal…

介观与纳米尺度物理 · 物理学 2020-06-12 Alex Gee , Ayoub H. Jaafar , Barbora Brachňaková , Jamie Massey , Christopher H. Marrows , Ivan Šalitroš , N. T. Kemp

We investigate the behavior of the frustrated $J_1$-$J_2$ Ising model on a square lattice under the influence of random dilution and spatial anisotropies. Spinless impurities generate a random-field type disorder for the spin-density wave…

无序系统与神经网络 · 物理学 2022-01-11 Xuecheng Ye , Rajesh Narayanan , Thomas Vojta

We report Monte Carlo studies of a two-dimensional soft colloidal crystal confined in a strip geometry by parallel walls. The wall-particle interaction has corrugations along the length of the strip. Compressing the crystal by decreasing…

软凝聚态物质 · 物理学 2013-05-29 Yu-Hang Chui , Surajit Sengupta , Ian K. Snook , Kurt Binder

Spin-state ordering - a periodic pattern of ions with different spin-state configurations along a crystal lattice - is a rare phenomenon, and its possible interrelation with other electronic degrees of freedom remains little explored. Here…

强关联电子 · 物理学 2024-03-27 E. Granado , C. W. Galdino , B. D. Moreno , G. King , D. C. Freitas

We perform large scale simulations of the frustrated Ising lattice gas, a three-dimensional lattice model of a structural glass, using the parallel tempering technique. We evaluate the spin and density overlap distributions, and the…

统计力学 · 物理学 2009-11-07 A. de Candia , A. Coniglio

The modification of geometry and interactions in two-dimensional magnetic nanosystems has enabled a range of studies addressing the magnetic order, collective low-energy dynamics, and emergent magnetic properties, in e.g. artificial spin…

We study ground-state orderings of particles in classical lattice-gas models of adsorption on crystal surfaces. In the considered models, the energy of adsorbed particles is a sum of two components, each one representing the energy of a…

统计力学 · 物理学 2009-10-31 Janusz Jedrzejewski , Jacek Miekisz

A spin-1 Ising model incorporating positional order to a standard lattice gas with no attractive interactions is introduced and found to be consistent with all known attributes of the freezing transition of the hard-sphere system.…

统计力学 · 物理学 2023-04-03 Jacobo Troncoso , Claudio A. Cerdeiriña

Spin-crossover (SCO) molecules are versatile magnetic switches with applications in molecular electronics and spintronics. Downscaling devices to the single-molecule level remains, however, a challenging task since the switching mechanism…

We consider a system of Ising spins s=1/2 with nonmagnetic impurities with charge associated with pseudospin S=1. The charge density is fixed pursuant to the concentration n. Analysis of the thermodynamic properties in the one-dimensional…

统计力学 · 物理学 2024-01-30 D. N. Yasinskaya , Yu. D. Panov

Realizing compact and scalable Ising machines that are compatible with CMOS-process technology is crucial to the effectiveness and practicality of using such hardware platforms for accelerating computationally intractable problems. Besides…

We study the steady state structure and dynamics of an interface in a pure Ising system on a square lattice placed in an inhomogeneous external field. The field has a profile with a fixed shape designed to stabilize a flat interface, and is…

软凝聚态物质 · 物理学 2007-07-17 Abhishek Chaudhuri , P. A. Sreeram , Surajit Sengupta

Density functional theory (DFT) calculations of 58 liquid elements at their triple point show that most metals exhibit near proportionality between thermal fluctuations between virial and potential-energy in the isochoric ensemble. This…

统计力学 · 物理学 2015-11-30 Felix Hummel , Georg Kresse , Jeppe C. Dyre , Ulf R. Pedersen

We show that a simple two dimensional model of spin crossover materials gives rise to spin-state smectic phases where the pattern of high-spin (HS) and low-spin (LS) metal centers spontaneously breaks rotational symmetry and translational…

强关联电子 · 物理学 2021-06-02 J. Cruddas , G. Ruzzi , B. J. Powell