Persistent dynamic magnetic state in artificial honeycomb spin ice
- URL: http://arxiv.org/abs/2305.00093v1
- Date: Fri, 28 Apr 2023 21:10:41 GMT
- Title: Persistent dynamic magnetic state in artificial honeycomb spin ice
- Authors: Jiasen Guo (1), Pousali Ghosh (1), Daniel Hill (1), Yiyao Chen (2),
Laura Stingaciu (3), Piotr. Zolnierczuk (3), Carsten A. Ullrich (1), Deepak
K. Singh (1) ((1) Department of Physics and Astronomy, University of
Missouri, Columbia, MO, (2) Suzhou Institute of Nano-Tech and Nano-Bionics,
Chinese Academy of Sciences, China, (3) Oak Ridge National Laboratory, Oak
Ridge, TN)
- Abstract summary: We show that thermally tunable artificial permalloy honeycomb lattice manifests a perpetual dynamic state due to self-propelled magnetic charge defect relaxation.
This suggests that dynamic phenomena in honeycomb spin ice are mediated by quasi-particle type entities.
Our research unveils a new macroscopic' magnetic particle that shares many known traits of quantum particles.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Topological magnetic charges, arising due to the non-vanishing magnetic flux
on spin ice vertices, serve as the origin of magnetic monopoles that traverse
the underlying lattice effortlessly. Unlike spin ice materials of atomic
origin, the dynamic state in artificial honeycomb spin ice is conventionally
described in terms of finite size domain wall kinetics that require magnetic
field or current application. Contrary to this common understanding, here we
show that thermally tunable artificial permalloy honeycomb lattice manifests a
perpetual dynamic state due to self-propelled magnetic charge defect relaxation
in the absence of any external tuning agent. Quantitative investigation of
magnetic charge defect dynamics using neutron spin echo spectroscopy reveals
sub-ns relaxation times that are comparable to monopole's relaxation in bulk
spin ices. Most importantly, the kinetic process remains unabated at low
temperature where thermal fluctuation is negligible. This suggests that dynamic
phenomena in honeycomb spin ice are mediated by quasi-particle type entities,
also confirmed by quantum Monte-Carlo simulations that replicate the kinetic
behavior. Our research unveils a new `macroscopic' magnetic particle that
shares many known traits of quantum particles, namely magnetic monopole and
magnon.
Related papers
- Robust room temperature ferromagnetism in an itinerant van der Waals
antiferromagnet [4.586172029546092]
coexistence of antiferromagnetic and ferromagnetic order at room temperature in single-phase van der Waals materials has attracted significant research interest.
A notable phenomenon observed is the evident odd-even layer-number effect at high temperature.
The robust ferromagnetic order observed in even-layer flakes at low temperature could potentially be attributed to spin-polarized defects.
arXiv Detail & Related papers (2023-11-03T06:13:22Z) - Directly imaging spin polarons in a kinetically frustrated Hubbard
system [0.0]
Magnetic polarons arise from interplay between kinetic energy of doped charge carriers and superexchange spin interactions.
Here we image itinerant spin polarons in a triangular lattice Hubbard system realised with ultracold atoms.
In contrast, around a charge dopant we find ferromagnetic correlations, a manifestation of the elusive Nagaoka effect.
arXiv Detail & Related papers (2023-08-24T17:41:07Z) - Activity-induced ferromagnetism in one-dimensional quantum many-body
systems [0.0]
We study a non-Hermitian quantum many-body model in one dimension analogous to the Vicsek model or active spin models.
Results show the emergence of a ferromagnetic order induced by the activity.
We numerically study a variant of our model with the hard-core condition relaxed, and confirm the robustness of ferromagnetic order emerging due to activity.
arXiv Detail & Related papers (2023-08-08T16:35:15Z) - Vibronic effects on the quantum tunnelling of magnetisation in Kramers
single-molecule magnets [0.0]
We quantify the vibronic contribution to the quantum tunnelling of the magnetisation in single-molecule magnets.
We find that the formation of magnetic polarons lowers the tunnelling probability in both amorphous and crystalline systems.
This work shows that spin-phonon coupling subtly influences magnetic relaxation in single-molecule magnets even at extremely low temperatures.
arXiv Detail & Related papers (2023-01-13T14:04:11Z) - Kagome qubit ice [55.73970798291771]
Topological phases of spin liquids with constrained disorder can host a kinetics of fractionalized excitations.
We present a realization of kagome spin ice in the superconducting qubits of a quantum annealer.
We show evidence of both the Ice-I phase and an unconventional field-induced Ice-II phase.
arXiv Detail & Related papers (2023-01-04T23:46:48Z) - Probing dynamics of a two-dimensional dipolar spin ensemble using single
qubit sensor [62.997667081978825]
We experimentally investigate individual spin dynamics in a two-dimensional ensemble of electron spins on the surface of a diamond crystal.
We show that this anomalously slow relaxation rate is due to the presence of strong dynamical disorder.
Our work paves the way towards microscopic study and control of quantum thermalization in strongly interacting disordered spin ensembles.
arXiv Detail & Related papers (2022-07-21T18:00:17Z) - Dispersive readout of molecular spin qudits [68.8204255655161]
We study the physics of a magnetic molecule described by a "giant" spin with multiple $d > 2$ spin states.
We derive an expression for the output modes in the dispersive regime of operation.
We find that the measurement of the cavity transmission allows to uniquely determine the spin state of the qudits.
arXiv Detail & Related papers (2021-09-29T18:00:09Z) - Spin Entanglement and Magnetic Competition via Long-range Interactions
in Spinor Quantum Optical Lattices [62.997667081978825]
We study the effects of cavity mediated long range magnetic interactions and optical lattices in ultracold matter.
We find that global interactions modify the underlying magnetic character of the system while introducing competition scenarios.
These allow new alternatives toward the design of robust mechanisms for quantum information purposes.
arXiv Detail & Related papers (2020-11-16T08:03:44Z) - Qubit spin ice [58.720142291102135]
We report a realization of spin ice in a lattice of superconducting qubits.
The ground state is classically described by the ice rule, and we achieve control over a fragile degeneracy point.
The demonstrated qubit control lays the groundwork for potential future study of topologically protected artificial quantum spin liquids.
arXiv Detail & Related papers (2020-07-21T01:50:40Z) - Coupling a mobile hole to an antiferromagnetic spin background:
Transient dynamics of a magnetic polaron [0.0]
In this work, we use a cold-atom quantum simulator to directly observe the formation dynamics and subsequent spreading of individual magnetic polarons.
Measuring the density- and spin-resolved evolution of a single hole in a 2D Hubbard insulator with short-range antiferromagnetic correlations reveals fast initial delocalization and a dressing of the spin background.
Our work enables the study of out-of-equilibrium emergent phenomena in the Fermi-Hubbard model, one dopant at a time.
arXiv Detail & Related papers (2020-06-11T17:59:54Z) - Quantum coherent spin-electric control in a molecular nanomagnet at
clock transitions [57.50861918173065]
Electrical control of spins at the nanoscale offers architectural advantages in spintronics.
Recent demonstrations of electric-field (E-field) sensitivities in molecular spin materials are tantalising.
E-field sensitivities reported so far are rather weak, prompting the question of how to design molecules with stronger spin-electric couplings.
arXiv Detail & Related papers (2020-05-03T09:27:31Z)
This list is automatically generated from the titles and abstracts of the papers in this site.
This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.