Current-sensitive Hall effect in a chiral-orbital-current state

• URL: http://arxiv.org/abs/2309.06610v1
• Date: Tue, 12 Sep 2023 21:27:08 GMT
• Title: Current-sensitive Hall effect in a chiral-orbital-current state
• Authors: Yu Zhang, Yifei Ni, Pedro Schlottmann, Rahul Nandkishore, Lance E. DeLong, and Gang Cao
• Abstract summary: Chiral orbital currents (COC) underpin a novel colossal magnetoresistance (CMR) in ferrimagnetic Mn3Si2Te6. Here we report the Hall effect in the COC state which exhibits the following unprecedented features.
• Score: 4.432844584569874
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Chiral orbital currents (COC) underpin a novel colossal magnetoresistance (CMR) in ferrimagnetic Mn3Si2Te6 [1]. Here we report the Hall effect in the COC state which exhibits the following unprecedented features: (1) A sharp, current-sensitive peak in the magnetic field dependence of the Hall resistivity; (2) An unusually large Hall angle reaching up to 0.15 (comparable to the highest values yet reported); and (3) A current-sensitive scaling relation between the Hall conductivity sigma_xy and the longitudinal conductivity sigma_xx, namely, sigma_xy ~ sigma_xx^alpha with alpha ranging between 3 and 5, which is both sensitive to external current and exceptionally large compared to alpha < 2 typical of most solids. These anomalies point to a giant, current-sensitive Hall effect that is unique to the COC state. We argue that a magnetic field induced by the fully developed COC combines with the applied magnetic field to exert the greatly enhanced transverse force on charge carriers, which dictates the novel Hall responses. The COC Hall effect is unique, as it is generated and controlled via the interaction between intrinsic COC and applied external currents, which leads to novel transport phenomena of fundamental and technological significance and requires new physics for explanation.

Related papers

• Fourth-order quantum master equations reveal that spin-phonon decoherence undercuts long magnetization relaxation times in single-molecule magnets [55.2480439325792]
  We numerically implement fourth-order quantum master equations to account for coherence terms and describe the full effect of up to two-phonon processes on spin dynamics.<n>We show that while strong axial magnetic anisotropy ensures slow magnetic relaxation approaching seconds at 77 K, the superposition of Kramers doublets is coherent for less than 10 ns due to a novel two-phonon pure dephasing mechanism.
  arXiv  Detail & Related papers  (2025-07-28T11:13:33Z)
• Interplay between dressed and strong-axial-field states in Nitrogen-Vacancy centers for quantum sensing and computation [0.0]
  The Nitrogen-Vacancy (NV) center in diamond is an intriguing electronic spin system with applications in quantum radiometry, sensing and computation. This paper presents a study of Free Induction Decay (FID) measurements performed on a NV center ensemble in the presence of strain and weak magnetic field. The simultaneous detection of dressed states and unbalanced superpositions of strong-axial field states in a single FID measurement is shown.
  arXiv  Detail & Related papers  (2024-12-23T14:28:19Z)
• Electrical control of topological 3Q state in an intercalated van der Waals antiferromagnet [1.714066678536933]
  Van der Waals (vdW) magnets have opened a new avenue of novel opportunities covering various interesting phases. Co2/3TaS2-an intercalated metallic vdW antiferromagnet-is one of the latest important additions to the growing list of materials. Careful bulk characterisations have shown the ground state of CoxTaS2 to be a rare 3Q tetrahedral structure for x less than 1/3.
  arXiv  Detail & Related papers  (2024-09-04T13:47:19Z)
• Interaction of Magnetic Fields with Spinons in a Fractionalized State [4.249804623327605]
  Applying a magnetic field up to 14 T causes an abrupt increase in heat capacity by as much as 5000% below 150 mK.<n>Spinons, though charge-neutral, are highly sensitive to magnetic fields at low temperatures.
  arXiv  Detail & Related papers  (2024-08-24T20:06:26Z)
• Decoherence induced by dipole-dipole couplings between atomic species in rare-earth ion-doped Y$_2$SiO$_5$ [0.0]
  We investigate the relationship between the magnetic field parameters and the decoherence caused by magnetic dipole-dipole coupling. This work allows us to pinpoint the most relevant decoherence mechanisms in the considered magnetic field regime.
  arXiv  Detail & Related papers  (2024-08-04T08:26:03Z)
• Long-range interactions in Weyl dense atomic arrays protected from dissipation and disorder [41.94295877935867]
  Long-range interactions are a key resource in many quantum phenomena and technologies. We show how to design the polaritonic bands of these atomic metamaterials to feature a pair of frequency-isolated Weyl points. These Weyl excitations can thus mediate interactions that are simultaneously long-range, due to their gapless nature; robust, due to the topological protection of Weyl points; and decoherence-free, due to their subradiant character.
  arXiv  Detail & Related papers  (2024-06-18T20:15:16Z)
• Quasiparticle effects in magnetic-field-resilient 3D transmons [0.0]
  We present measurements of the parity-switching time of a field-resilient 3D transmon with in-plane field up to 0.41T. We demonstrate that the superconducting-gap asymmetry plays a crucial role in the observed behavior. We establish that Al-AlO$_x$-Al JJs could be used in architectures for the parity-readout and manipulation of topological qubits.
  arXiv  Detail & Related papers  (2024-03-05T22:37:21Z)
• Thermal masses and trapped-ion quantum spin models: a self-consistent approach to Yukawa-type interactions in the $λ\!φ^4$ model [44.99833362998488]
  A quantum simulation of magnetism in trapped-ion systems makes use of the crystal vibrations to mediate pairwise interactions between spins. These interactions can be accounted for by a long-wavelength relativistic theory, where the phonons are described by a coarse-grained Klein-Gordon field. We show that thermal effects, which can be controlled by laser cooling, can unveil this flow through the appearance of thermal masses in interacting QFTs.
  arXiv  Detail & Related papers  (2023-05-10T12:59:07Z)
• Quantum Control of Atom-Ion Charge Exchange via Light-induced Conical Intersections [66.33913750180542]
  Conical intersections are crossing points or lines between two or more adiabatic electronic potential energy surfaces. We predict significant or measurable non-adiabatic effects in an ultracold atom-ion charge-exchange reaction. In the laser frequency window, where conical interactions are present, the difference in rate coefficients can be as large as $10-9$ cm$3$/s.
  arXiv  Detail & Related papers  (2023-04-15T14:43:21Z)
• Control of chiral orbital currents in a colossal magnetoresistance material [6.520855316274887]
  We report an exotic quantum state driven by ab-plane chiral orbital currents (COC) flowing along edges of MnTe6 octahedra. The c-axis orbital moments of ab-plane COC couple to the ferrimagnetic Mn spins to drastically increase the ab-plane conductivity (CMR) when an external magnetic field is aligned along the magnetic hard c-axis. The control of the COC-enabled CMR and bistable switching offers a fundamentally new paradigm for quantum technologies.
  arXiv  Detail & Related papers  (2022-09-18T22:53:21Z)
• 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)
• Ferromagnetic Gyroscopes for Tests of Fundamental Physics [49.853792068336034]
  A ferromagnetic gyroscope (FG) is a ferromagnet whose angular momentum is dominated by electron spin polarization and that will precess under the action of an external torque. We model and analyze FG dynamics and sensitivity, focusing on practical schemes for experimental realization.
  arXiv  Detail & Related papers  (2020-10-17T07:13:50Z)
• 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)
• Optically pumped spin polarization as a probe of many-body thermalization [50.591267188664666]
  We study the spin diffusion dynamics of 13C in diamond, which we dynamically polarize at room temperature via optical spin pumping of engineered color centers. We find good thermal contact throughout the nuclear spin bath, virtually independent of the hyperfine coupling strength. Our results open intriguing opportunities to study the onset of thermalization in a system by controlling the internal interactions within the bath.
  arXiv  Detail & Related papers  (2020-05-01T23:16:33Z)
• Observation of the Anomalous Hall Effect in a Collinear Antiferromagnet [8.779987820381487]
  Time-reversal breaking is the basic physics concept underpinning many magnetic topological phenomena. A potential breakthrough is the recent theoretical prediction of the AHE arising from collinear antiferromagnetism. Our results open a new unexplored chapter of time-reversal symmetry breaking phenomena in the abundant class of collinear antiferromagnetic materials.
  arXiv  Detail & Related papers  (2020-02-20T12:55:31Z)

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.