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

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.

scholarly journals Optimized production of ultracold ground-state molecules: Stabilization employing potentials with ion-pair character and strong spin-orbit coupling

2012 ◽  
Vol 86 (4) ◽  
Author(s):  
Michał Tomza ◽  
Michael H. Goerz ◽  
Monika Musiał ◽  
Robert Moszynski ◽  
Christiane P. Koch
Keyword(s):  
Ground State ◽  
Ion Pair ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Strong Spin

scholarly journals Pauli metallic ground state in Hubbard clusters with Rashba spin-orbit coupling

2018 ◽  
Vol 97 (12) ◽  
Author(s):  
Valentina Brosco ◽  
Daniele Guerci ◽  
Massimo Capone
Keyword(s):  
Ground State ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Rashba Spin

Untersuchung zur externen Spin-Bahn-Kopplung bei aromatischen Molekülen / External Spin-Orbit-Coupling in Aromatic Molecules

1976 ◽  
Vol 31 (7) ◽  
pp. 748-753
Author(s):  
J. Friedrich ◽  
G. Weinzierl ◽  
F. Dörr
Keyword(s):  
Nuclear Charge ◽  
Heavy Atom ◽  
Orbit Coupling ◽  
Coupling Mechanism ◽  
Intermolecular Distance ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Overlap Integrals ◽  
Aromatic Molecules ◽  
Atom Effect

Abstract The influence of ethylhalogenes on the polarization of the phosphorescence of naphthalene was studied by means of the photoselection technique. It is shown that with increasing concentration and with increasing nuclear charge of the heavy atom the phosphorescence of naphthalene becomes increasingly depolarized. The influence of the external heavy atom on the Tx- and Tz- substate is stronger than on the Ty-substate. From the concentration dependence of the depolarizatign conclusions concerning the mechanism of the external spin-orbit-coupling are drawn. The dirept spin-orbit-coupling mechanism is ruled out. In the model discussed the variation of the external heavy atom effect with the intermolecular distance is related to overlap integrals.

Tunable ground-state solitons in spin–orbit coupling Bose–Einstein condensates in the presence of optical lattices

2017 ◽  
Vol 26 (8) ◽  
pp. 080304
Author(s):  
Huafeng Zhang ◽  
Fang Chen ◽  
Chunchao Yu ◽  
Lihui Sun ◽  
Dahai Xu
Keyword(s):  
Ground State ◽  
Optical Lattices ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Bose Einstein

Influence of magnetic field and Rashba spin–orbit coupling on strong-coupling magnetopolarons in quantum disks

2014 ◽  
Vol 28 (27) ◽  
pp. 1450185
Author(s):  
Wei Xin ◽  
Chao Han ◽  
Eerdunchaolu
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Interaction Energy ◽  
Ground State ◽  
State Interaction ◽  
Orbit Coupling ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Phonon Interaction ◽  
Rashba Spin

On the basis of Lee–Low–Pines (LLP) unitary transformation, the influence of external magnetic field, Rashba spin–orbit coupling and quantum size effect on the ground-state interaction energy of strong-coupling magnetopolarons in quantum disks (QDs) is studied by using the Tokuda improved linear combine operator method. The results show that the ground-state interaction energy of magnetopolarons consists of four parts: the energy caused by the confinement potential of QDs, interaction energy between the electron and external magnetic field, electron and longitudinal-optical (LO) phonon interaction energy and additional term of Rashba effect originating from phonons. The electron–LO phonon interaction energy Ee- ph and additional term of Rashba effect are always negative; the absolute value |Ee- ph | increases with increasing transverse confinement strength ω0, cyclotron frequency of external magnetic field ωc and electron–LO phonon coupling strength α, but decreases with increasing the thickness of QDs L; the state properties of magnetopolarons are closely linked with the sign of the ground-state interaction energy of magnetopolarons E int and change of E int with ωc, ω0, α and L. In addition, the vibration frequency of magnetopolarons λ increases with increasing ωc, ω0 and α, but decreases with increasing L. For the ground state of magnetopolarons in QDs, the electron–LO phonon interaction plays a significant role, meanwhile, the influence of Rashba spin–orbit coupling effect cannot be ignored.

Sign in / Sign up

Export Citation Format

Share Document