Spin measurements and control of cold atoms using spin-orbit fields

A systematic ab initio study is performed on the ground state static dipole polarizabilities of the 2 S +1 S, S >1/2, atoms from N to Bi, Cr, Mo, Mn, Tc and Re. The benchmark scalar-relativistic values of the scalar polarizability components are obtained using the coupled cluster method. The spin–orbit configuration interaction calculations are carried out for the anisotropic (tensor) polarizability components of these atoms (except Mn and Tc) that arise from the second-order spin–orbit interaction. The tensor polarizabilities are calculated for the first time and found to increase from 10 −5 (N) to 3.8 atomic units (Bi) approximately as the fourth power of the nuclear charge. The simple correlations and implication to magnetic trapping of cold atoms are discussed.

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The confinement induced resonance in spin-orbit coupled cold atoms with Raman coupling

Scientific Reports ◽

10.1038/srep04992 ◽

2014 ◽

Vol 4 (1) ◽

Cited By ~ 13

Author(s):

Yi-Cai Zhang ◽

Shu-Wei Song ◽

Wu-Ming Liu

Keyword(s):

Cold Atoms ◽

Spin Orbit

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Whirling interlayer fields as a new source of stable topological order in moiré CrI3

10.21203/rs.3.rs-1001541/v1 ◽

2021 ◽

Author(s):

Doried Ghader ◽

Bilal Jabakhanji ◽

Alessandro Stroppa

Keyword(s):

Ground State ◽

Nearest Neighbor ◽

Current Knowledge ◽

Orbit Coupling ◽

Coupling Mechanism ◽

Spin Orbit Coupling ◽

Topological Order ◽

Spin Orbit ◽

Interlayer Exchange ◽

And Control

Abstract The moiré engineering of two-dimensional magnets opens unprecedented opportunities to design novel magnetic states via the stacking-dependent magnetism. Here, we explore the formation and control of ground state topological spin structures (TSTs) in moiré CrI3 without including the nearest-neighbor (NN) Dzyaloshinskii-Moriya interactions (DMI) and dipolar interactions in the theoretical approach. Using stochastic Landau-Lifshitz-Gilbert simulations, we unveil the emergence of vortex and antivortex interlayer exchange fields at large moiré periodicity. The whirling fields stabilize spontaneous and field-assisted ground state TSTs with various topologies, including skyrmionic clusters with high topological charges. Furthermore, by examining the effect of the Kitaev interaction and the next NN DMI, we propose the latter as the unique spin-orbit coupling mechanism compatible with the experimental results on monolayer and twisted CrI3. Therefore, our study goes beyond the current knowledge about TSTs in moiré magnets, opens exciting opportunities for moiré skyrmionics, and uncovers the spin-orbit coupling in CrI3.

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Oscillation of the spin-currents of cold atoms on a ring due to light-induced spin–orbit coupling

Chinese Physics B ◽

10.1088/1674-1056/24/6/060305 ◽

2015 ◽

Vol 24 (6) ◽

pp. 060305

Author(s):

Wen-Fang Xie ◽

Yan-Zhang He ◽

Cheng-Guang Bao

Keyword(s):

Cold Atoms ◽

Orbit Coupling ◽

Spin Orbit Coupling ◽

Spin Orbit ◽

Spin Currents

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Cavity-assisted dynamical spin-orbit coupling in cold atoms

Physical Review A ◽

10.1103/physreva.89.011602 ◽

2014 ◽

Vol 89 (1) ◽

Cited By ~ 42

Author(s):

Lin Dong ◽

Lu Zhou ◽

Biao Wu ◽

B. Ramachandhran ◽

Han Pu

Keyword(s):

Cold Atoms ◽

Orbit Coupling ◽

Spin Orbit Coupling ◽

Spin Orbit ◽

Dynamical Spin

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Spin-orbit torque switching of chiral magnetization across a synthetic antiferromagnet

Communications Physics ◽

10.1038/s42005-020-00513-z ◽

2021 ◽

Vol 4 (1) ◽

Author(s):

Kang Wang ◽

Lijuan Qian ◽

See-Chen Ying ◽

Gang Xiao

Keyword(s):

Three Dimensional ◽

Magnetic Multilayers ◽

Spin Orbit ◽

Magnetic Structures ◽

Numerical Studies ◽

Synthetic Antiferromagnet ◽

Magnetic Layers ◽

Low Dimensional ◽

And Control ◽

Moriya Interaction

AbstractThe interfacial Dzyaloshinskii-Moriya interaction (DMI) holds promises for design and control of chiral spin textures in low-dimensional magnets with efficient current-driven dynamics. Recently, an interlayer DMI has been found to exist across magnetic multilayers with a heavy-metal spacer between magnetic layers. This opens the possibility of chirality in these three-dimensional magnetic structures. Here we show the existence of the interlayer DMI in a synthetic antiferromagnetic multilayer with both inversion and in-plane asymmetry. We analyse the interlayer DMI’s effects on the magnetization and the current-induced spin-orbit torque (SOT) switching of magnetization through a combination of experimental and numerical studies. The chiral nature of the interlayer DMI leads to an asymmetric SOT switching of magnetization under an in-plane magnetic field. Our work paves the way for further explorations on controlling chiral magnetizations across magnetic multilayers through SOTs, which can provide a new path in the design of SOT devices.

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