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A cluster mean-field method is introduced and the applications to the Ising and Heisenberg models are demonstrated. We divide the lattice sites into clusters whose size and shape are selected so that the equivalence of all sites in a…

强关联电子 · 物理学 2013-05-29 Daisuke Yamamoto

In this letter, we apply the mixed-bond spin-1 Ising model to the study of the magnetic properties of Fe-Mn alloys in the $\alpha$ phase by employing the effective field theory (EFT). Here, we suggest a new approach to the ferromagnetic…

无序系统与神经网络 · 物理学 2014-11-18 A. S. Freitas , Douglas F. de Albuquerque , I. P. Fittipaldi , N. O. Moreno

Solid state quantum computing proposals rely on adiabatic operations of the exchange gate among localized spins in nanostructures. We study corrections to the Heisenberg interaction between lateral semiconductor quantum dots in an external…

介观与纳米尺度物理 · 物理学 2007-05-23 V. W. Scarola , S. Das Sarma

A spin-orbit-coupled Bose-Einstein-condensed cloud of atoms confined in an annular trapping potential shows a variety of phases that we investigate in the present study. Starting with the non-interacting problem, the homogeneous phase that…

量子气体 · 物理学 2016-02-17 E. Ö. Karabulut , F. Malet , A. L. Fetter , G. M. Kavoulakis , S. M. Reimann

Experimental observations of the ultrafast (less than 50 fs) demagnetization of Ni have so far defied theoretical explanations particularly since its spin-flipping time is much less than that resulting from spin-orbit and electron-lattice…

强关联电子 · 物理学 2020-07-08 Shree Ram Acharya , Volodymyr Turkowski , Guo-ping Zhang Talat S. Rahman

Understanding and quantifying entanglement entropy is crucial to characterize the quantum behaviors that drive phenomena in a variety of systems. Rare-earth spin complexes, with their unique magnetic properties, provide fertile ground for…

其他凝聚态物理 · 物理学 2025-05-12 David W. Facemyer , Sergio E. Ulloa

The general properties of the order parameter for a dipolar spinor Bose-Einstein condensate are discussed based on symmetries of interactions. An initially spin-polarized dipolar condensate is shown to dynamically generate a non-singular…

其他凝聚态物理 · 物理学 2007-05-23 Yuki Kawaguchi , Hiroki Saito , Masahito Ueda

We investigate fast transport and spin manipulation of tunable spin-orbit-coupled Bose-Einstein condensates in a moving harmonic trap. Motivated by the concept of "shortcuts to adiabaticity", we design inversely the time-dependent trap…

量子物理 · 物理学 2018-02-14 Xi Chen , Ruan-Lei Jiang , Jing Li , Yue Ban. , E. Ya. Sherman

Rashba-type spin-orbit coupling gives rise to distinctive surface and interface phenomena, such as spin-momentum locking and spin splitting. In nonequilibrium settings, one of the key manifestations is the (Rashba-)Edelstein effect, where…

材料科学 · 物理学 2025-10-08 Oliver Busch , Franziska Ziolkowski , Börge Göbel , Ingrid Mertig , Jürgen Henk

We developed a method which performs the coupled adiabatic spin and lattice dynamics based on the tight-binding electronic structure model, where the intrinsic magnetic field and ionic forces are calculated from the converged…

The ultra-fast demagnetization of small iron clusters initiated by an intense optical excitation is studied with time-dependent spin density functional theory (TDSDFT). In particular we investigate the effect of the spin-orbit interaction…

介观与纳米尺度物理 · 物理学 2016-07-27 Maria Stamenova , Jacopo Simoni , Stefano Sanvito

We study the spatiotemporal Bloch states of a high-frequency driven two-component Bose-Einstein condensate (BEC) with spin-orbit coupling (SOC) in an optical lattice. By adopting the rotating-wave approximation (RWA) and applying an exact…

量子物理 · 物理学 2019-09-04 Yawen Wei , Chao Kong , Wenhua Hai

The influence of spin-orbit interaction on chemical bonds in elemental solids and homonuclear dimers is analyzed by means of density-functional-theory calculations. Employing highly precise all-electron full-potential methodology, our…

材料科学 · 物理学 2022-04-07 Andris Gulans , Claudia Draxl

We propose an experimental scheme to study spin-orbit coupling effects in a of two-dimensional (2D) Fermi atomic gas cloud by coupling its internal electronic states (pseudospins) to radiation in a delta configuration. The induced…

统计力学 · 物理学 2009-11-13 Xiong-Jun Liu , Mario F. Borunda , Xin Liu , Jairo Sinova

One of the main characteristics of the new family of two-dimensional crystals of semiconducting transition metal dichalcogenides (TMD) is the strong spin-orbit interaction, which makes them very promising for future applications in…

介观与纳米尺度物理 · 物理学 2015-11-11 R. Roldán , M. P. López-Sancho , E. Cappelluti , J. A. Silva-Guillén , P. Ordejón , F. Guinea

We study the static and the dynamic response of coherently coupled two component Bose-Einstein condensates due to a spin-dipole perturbation. The static dipole susceptibility is determined and it is shown to be a key quantity to identify…

量子气体 · 物理学 2015-09-30 Alberto Sartori , Jamir Marino , Sandro Stringari , Alessio Recati

We use an effective field theory (EFT) approach to calculate the next to leading order (NLO) gravitational spin-orbit interaction between two spinning compact objects. The NLO spin-orbit interaction provides the most computationally complex…

广义相对论与量子宇宙学 · 物理学 2010-12-03 Michele Levi

We describe dynamics of spin and valley transitions driven by alternating electric fields in quantum dots defined electrostatically within semiconducting carbon nanotubes (CNT). We use the tight-binding approach to describe the states…

介观与纳米尺度物理 · 物理学 2014-09-04 E. N. Osika , A. Mreńca , B. Szafran

We investigate the interplay between topological effects and Mott physics in two dimensions on a graphene-like lattice, via a tight-binding model containing an anisotropic spin-orbit coupling on the next-nearest-neighbour links and the…

强关联电子 · 物理学 2015-06-16 Tianhan Liu , Benoît Douçot , Karyn Le Hur

We investigate the properties of the Lieb lattice, i.e a face-centered square lattice, subjected to external gauge fields. We show that an Abelian gauge field leads to a peculiar quantum Hall effect, which is a consequence of the single…

量子气体 · 物理学 2011-06-22 N. Goldman , D. F. Urban , D. Bercioux