Energy Storage via Topological Spin Textures

Tserkovnyak, Yaroslav; Xiao, Jiang

doi:10.1103/physrevlett.121.127701

Cited by 26 publications

(16 citation statements)

References 52 publications

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“…Like chiral domain walls in one dimension [26] and baby skyrmions in two-dimensional magnets [27], suitable spin-transfer torques at the interface bias the injection of these topological excitations into the frustrated magnet, which diffuse over the bulk as stable magnetic textures carrying quanta of topological charge. Robustness against structural distortions and moderate external perturbations [28], along with their particle-like behavior, make skyrmions attractive from the technological standpoint due to their potential use as building blocks for information and energy storage [29,30]. It is also worth remarking that frustrated magnets provide an additional condensed matter realization of these topological defects, which were originally proposed in low-energy chiral effective descriptions of QCD [21,31] and also appear in cosmology [32] and string theory [33].…”

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confidence: 99%

Hydrodynamics of three-dimensional skyrmions in frustrated magnets

2019

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We study the nucleation and collective dynamics of Shankar skyrmions [R. Shankar, Journal de Physique 38, 1405(1977] in the class of frustrated magnetic systems described by an SO(3) order parameter, including multi-lattice antiferromagnets and amorphous magnets. We infer the expression for the spin-transfer torque that injects skyrmion charge into the system and the Onsagerreciprocal pumping force that enables its detection by electrical means. The thermally-assisted flow of topological charge gives rise to an algebraically decaying drag signal in nonlocal transport measurements. We contrast our findings to analogous effects mediated by spin supercurrents. arXiv:1901.01208v1 [cond-mat.mes-hall]

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confidence: 99%

Hydrodynamics of three-dimensional skyrmions in frustrated magnets

2019

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“…Quantum battery is not only a scientifically interesting subject, but is a practical need. Devising a quantum battery in various forms has constituted an emerging field of nano-devices for quantum thermodynamics, such as solid-state batteries [1,2], topological batteries [3][4][5][6], and spin batteries [7][8][9]. The contemporary development of quantum battery also inspires the relevant investigations in quantum information about the work extraction [10] and the optimal finite-time operation [11][12][13].…”

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confidence: 99%

High-capacity and high-power collective charging with spin chargers

Huangfu,

Jing

2021

Preprint

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Quantum battery works as a micro-or nano-device to store and redistribute energy at the quantum level. Here we propose a spin-charger protocol, in which the battery cells are charged by a finite number of spins through a general Heisenberg XY interaction. Under the isotropic interaction, the spin-charger protocol is endowed with a higher capacity in terms of the maximum stored energy than the conventional protocols, where the battery is charged by a continuous-variable system, e.g., a cavity mode. By tuning the charger size, a trade-off between the maximum stored energy and the average charging power is found in comparison to the cavity-charger protocol in the Tavis-Cummings model. Quantum advantage of our protocol is manifested by the scaling behavior of the optimal average power with respect to the battery size, in comparing the collective charging scheme to its parallel counterpart. We also discuss the detrimental effect on the charging performance from the anisotropic interaction between the battery and the charger, the non-ideal initial states for both of them, and the crosstalk among the charger spins. A strong charger-charger interaction can be used to decouple the battery and the charger. Our findings about the advantages of the spin-charger protocol over the conventional cavity-charger protocols, including the high capacity of energy storage and the superior power-law in the collective charging, provide an insight to exploit an efficient quantum battery based on the spin-spin-environment model.

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“…The possibility of using spin degrees of freedom as energy carriers is barely known. Localized magnetic textures -noncollinear spin structures -such as domain walls (DWs), vortices and skyrmions, whose stability is grounded to their nontrivial topology [1][2][3], have been already discussed broadly as information carriers [4,5] but rarely as stationary energy storing devices [6][7][8][9]. These so-called magnetic solitons (MSs) already play a pivotal role for the development of spin-based applications such as processing [4,5], sensing [10], storing information [11] as well as radio-frequency [12] and neuroinspired devices [13,14].…”

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Topological energy release from collision of relativistic antiferromagnetic solitons

Otxoa,

Rama-Eiroa,

Roy

et al. 2021

Preprint

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Magnetic solitons offer functionalities as information carriers in multiple spintronic and magnonic applications. However, their potential for nanoscale energy transport has not been revealed. Here we demonstrate that antiferromagnetic solitons, e.g. domain walls, can uptake, transport and release energy. The key for this functionality resides in their relativistic kinematics; their self-energy increases with velocity due to Lorentz contraction of the soliton and their dynamics can be accelerated up to the effective speed of light of the magnetic medium. Furthermore, their classification in robust topological classes allows to selectively release this energy back into the medium by colliding solitons with opposite topology. Our work uncovers important energyrelated aspects of the physics of antiferromagnetic solitons and opens up the attractive possibility for spin-based nanoscale and ultra-fast energy transport devices.

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Energy Storage via Topological Spin Textures

Cited by 26 publications

References 52 publications

Hydrodynamics of three-dimensional skyrmions in frustrated magnets

Hydrodynamics of three-dimensional skyrmions in frustrated magnets

High-capacity and high-power collective charging with spin chargers

Topological energy release from collision of relativistic antiferromagnetic solitons

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