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相关论文: Spin melting and refreezing driven by uniaxial com…

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We have demonstrated that ferroelectric polarization in a spin-driven multiferroic CuFe1-xGaxO2 with x = 0.035 can be controlled by the application of uniaxial pressure. Our neutron diffraction and in-situ ferroelectric polarization…

强关联电子 · 物理学 2015-05-28 T. Nakajima , S. Mitsuda , T. Nakamura , H. Ishii , T. Haku , Y. Honma , M. Kosaka , N. Aso , Y. Uwatoko

The spin ice materials Ho2Ti2O7 and Dy2Ti2O7 are experimental and theoretical exemplars of highly frustrated magnetic materials. However, the effects of an applied uniaxial pressure are not well studied, and here we report magnetization…

Spin ice in a magnetic field in the [111] direction displays two magnetization plateaux, one at saturation and an intermediate one with finite entropy. We study the crossovers between the different regimes from a point of view of…

统计力学 · 物理学 2007-05-23 S. V. Isakov , K. S. Raman , R. Moessner , S. L. Sondhi

Quantum Monte Carlo (QMC) and density-matrix renormalization group (DMRG) methods are used to study the coupled spin-pseudospin Hamiltonian in one-dimension (1D) that models the charge-ordering instability of the anisotropic Hubbard ladder…

强关联电子 · 物理学 2007-05-23 Y. Ohta , T. Nakaegawa , S. Ejima

We use a quantum Monte Carlo method to study the ground state and thermodynamic phase transitions of the spin supersolid phase in the S=1 Heisenberg model with uniaxial anisotropy. The thermal melting of the supersolid phase shows unqiue…

强关联电子 · 物理学 2009-11-13 P. Sengupta , C. D. Batista

Dilute dipolar Ising magnets remain a notoriously hard problem to tackle both analytically and numerically because of long-ranged interactions between spins as well as rare region effects. We study a new type of anisotropic dilute dipolar…

无序系统与神经网络 · 物理学 2019-08-28 Tushar Kanti Bose , Roderich Moessner , Arnab Sen

We demonstrate that a homogeneous spin polarization in one-dimensional structures of finite length in the presence of Bychkov-Rashba spin-orbit coupling decays spontaneously toward a persistent spin helix. The analysis of formation of spin…

介观与纳米尺度物理 · 物理学 2011-06-16 V. A. Slipko , I. Savran , Y. V. Pershin

We study the properties of spin systems realized by cold polar molecules interacting via dipole-dipole interactions in two dimensions. Using a spin wave theory, that allows for the full treatment of the characteristic long-distance tail of…

量子气体 · 物理学 2012-07-12 David Peter , Steffen Müller , Stefan Wessel , Hans Peter Büchler

In this study we calculate the dipole-coupling-induced quartic in-plane anisotropy of a square ferromagnetic Heisenberg monolayer. This anisotropy increases with an increasing temperature, reaching its maximum value close to the Curie…

强关联电子 · 物理学 2009-11-07 M. Dantziger , B. Glinsmann , S. Scheffler , B. Zimmermann , P. J. Jensen

By means of the molecular dynamics simulation on gradual cooling processes, we investigate magnetic properties of classical spin systems only with the magnetic dipole-dipole interaction, which we call dipolar systems. Focusing on their…

统计力学 · 物理学 2007-05-23 Ryoko Sugano , Katsuyoshi Matsushita , Akiyoshi Kuroda , Yusuke Tomita , Hajime Takayama

We report a Monte Carlo simulation of deposition of magnetic particles on a one-dimensional substrate. Incoming particles interact with those that are already part of the deposit via a dipole-dipole potential. The strength of the dipolar…

凝聚态物理 · 物理学 2009-11-10 F. de los Santos , M. Tasinkevych , J. M. Tavares , P. I. C. Teixeira

A quantum mechanical close coupling theory of spin relaxation in the stretched hyperfine level of sodium is presented. We calculate the dipolar relaxation rate of magnetically trapped cold sodium atoms in the magnetic field. The influence…

原子物理 · 物理学 2007-05-23 B. Zygelman

We study the entanglement emergence in a dipolar-coupled nuclear spin-1/2 system cooled using the adiabatic demagnetization technique. The unexpected behavior of entanglement for the next- and next-next-neighbor spins is revealed: entangled…

量子物理 · 物理学 2015-06-03 Gregory B. Furman , Victor M. Meerovich , Vladimir L. Sokolovsky

We investigate the dependence of spin squeezing on the polar angle of the initial coherent spin state $|\theta_0, \phi_0>$ in a generalized one-axis twisting model, where the detuning $\delta$ is taken into account. We show explicitly that…

量子物理 · 物理学 2009-10-26 Guang-Ri Jin , Yong-Chun Liu , Wu-Ming Liu

We investigate the charge conductivity and current-induced spin polarization on the surface state of a three-dimensional topological insulator by including the hexagonal warping effect of Fermi surface both in classical and quantum…

介观与纳米尺度物理 · 物理学 2011-11-01 C. M. Wang , F. J. Yu

We have studied, using molecular dynamics simulations, the pressure-induced melting in a monolayer of soft repulsive spherocylinders whose centers of mass are constrained to move on the surface of a sphere. We show that the orientational…

软凝聚态物质 · 物理学 2025-03-13 Jaydeep Mandal , Chandan Dasgupta , Prabal K. Maiti

We study the critical dynamics of three-dimensional ferromagnets with uniaxial anisotropy by taking into account exchange and dipole-dipole interaction. The dynamic spin correlation functions and the transport coefficients are calculated…

统计力学 · 物理学 2009-10-31 S. Henneberger , E. Frey , P. G. Maier , F. Schwabl , G. M. Kalvius

Artificial spin ice provides a versatile setting for emergent gauge fields and magnetic monopole excitations. Here we propose a driven-dissipative polariton realization of artificial spin ice, in which the circular polarization of each link…

介观与纳米尺度物理 · 物理学 2026-03-31 Junhui Cao , Alexey Kavokin

A cluster Monte Carlo method for systems of classical spins with purely dipolar couplings is presented. It is tested and applied for finite arrays of perpendicular Ising dipoles on the triangular lattice. This model is a modification with…

统计力学 · 物理学 2009-11-07 Ulrich K. Roessler

An electric current flowing in a ferromagnetic metal carries spin angular momentum, i.e. it is spin-polarized. Here, we measure the spin-wave Doppler shift induced by the transfer of angular momentum from the diffusive spin-polarized…