11,205 research outputs found
Skyrmion dynamics in a chiral magnet driven by periodically varying spin currents
In this work, we investigated the spin dynamics in a slab of chiral magnets
induced by an alternating (ac) spin current. Periodic trajectories of the
skyrmion in real space are discovered under the ac current as a result of the
Magnus and viscous forces, which originate from the Gilbert damping, the spin
transfer torque, and the -nonadiabatic torque effects. The results are
obtained by numerically solving the Landau-Lifshitz-Gilbert equation and can be
explained by the Thiele equation characterizing the skyrmion core motion
Predictions of the hidden-charm molecular states with four-quark component
In this work, we study the -type molecular systems systematically
via one pion exchange model, where denotes the narrow meson
or meson and is its antiparticle. With the effective
potentials, we try to find the bound state solutions of the corresponding
systems, which provide crucial information of whether there exist the
-type molecular states. According to our analysis, we predict some
-type molecular states which may be accessible at future experiments
like LHCb and forthcoming BelleII.Comment: 13 pages, 2 figures and 8 tables. Accepted by Eur. Phys. J.
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