Cavity-mediated superconductor$\unicode{x2013}$ferromagnetic insulator coupling

• URL: http://arxiv.org/abs/2209.09308v1
• Date: Mon, 19 Sep 2022 19:05:38 GMT
• Title: Cavity-mediated superconductor$\unicode{x2013}$ferromagnetic insulator coupling
• Authors: Andreas T.G. Janss{\o}nn, Henning G. Hugdal, Arne Brataas, Sol H. Jacobsen
• Abstract summary: A proof of concept showed that cavity photons can mediate a ferromagnetic (FI) signature over a distance insulator. We show that an arbitrary field of $14 isotropyIG induced an arbitrary tilt of the FI. We discuss the implications and potential applications of such superconducting spintronics.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: A recent proof of concept showed that cavity photons can mediate superconducting (SC) signatures to a ferromagnetic insulator (FI) over a macroscopic distance [Phys. Rev. B, 102, 180506(R) (2020)]. In contrast with conventional proximity systems, this facilitates long-distance FI$\unicode{x2013}$SC coupling, local subjection to different drives and temperatures, and studies of their mutual interactions without proximal disruption of their orders. Here we derive a microscopic theory for these interactions, with an emphasis on the leading effect on the FI, namely, an induced anisotropy field. In an arbitrary practical example, we find an anisotropy field of $14 \unicode{x2013} 16$ $\mu$T, which is expected to yield an experimentally appreciable tilt of the FI spins for low-coercivity FIs such as Bi-YIG. We discuss the implications and potential applications of such a system in the context of superconducting spintronics.

Related papers

• Itinerant magnetism in Hubbard models with long-range interactions [0.0]
  A wide variety of platforms, ranging from semiconductor quantum-dot arrays to mo'e materials, have recently emerged as powerful quantum simulators. We investigate the effects of the Hubbard model which includes long-dimensional lattices. For small electron dopings, we uncover a rich variety of magnetically ordered numerically states.
  arXiv  Detail & Related papers  (2024-10-01T18:00:00Z)
• Superluminal Propagation of Composite Collective Modes in Superconductor-Ferromagnet Heterostructures [0.0]
  We show that the spectrum of composite collective modes, $omega(k)$, has a qualitatively different form in the case of $H_demH_an$ and of $H_dem>H_an$. For moderate or weak anisotropy in ferromagnet the group velocity of collective modes demonstrates inflection point where the group velocity become infinite and is superluminal.
  arXiv  Detail & Related papers  (2024-07-07T18:01:17Z)
• Superconductivity in a Topological Lattice Model with Strong Repulsion [1.1608869880392607]
  We introduce a minimal 2D lattice model that incorporates time-reversal symmetry, band topology, and strong repulsive interactions. We demonstrate that it is formed from the weak pairing of holes atop the QSH insulator. Motivated by this, we elucidate structural similarities and differences between our model and those of TBG in its chiral limit.
  arXiv  Detail & Related papers  (2023-08-21T18:00:01Z)
• Fragmented superconductivity in the Hubbard model as solitons in Ginzburg-Landau theory [58.720142291102135]
  Superconductivity and charge density waves are observed in close vicinity in strongly correlated materials. We investigate the nature of such an intertwined state of matter stabilized in the phase diagram of the elementary $t$-$tprime$-$U$ Hubbard model. We provide conclusive evidence that the macroscopic wave functions of the superconducting fragments are well-described by soliton solutions of a Ginzburg-Landau equation.
  arXiv  Detail & Related papers  (2023-07-21T18:00:07Z)
• Spin Current Density Functional Theory of the Quantum Spin-Hall Phase [59.50307752165016]
  We apply the spin current density functional theory to the quantum spin-Hall phase. We show that the explicit account of spin currents in the electron-electron potential of the SCDFT is key to the appearance of a Dirac cone.
  arXiv  Detail & Related papers  (2022-08-29T20:46:26Z)
• Confinement-Induced Enhancement of Superconductivity in a Spin-$\frac{1}{2}$ Fermion Chain Coupled to a $\mathbb{Z}_2$ Lattice Gauge Field [0.0]
  In the odd-gauge sector, the superconducting model reduces to the Hubbard model with repulsive onsite interaction. We uncover how electric fields affect low-energy excitations by both analytical and numerical methods.
  arXiv  Detail & Related papers  (2022-08-15T10:03:27Z)
• A low-loss ferrite circulator as a tunable chiral quantum system [108.66477491099887]
  We demonstrate a low-loss waveguide circulator constructed with single-crystalline yttrium iron garnet (YIG) in a 3D cavity. We show the coherent coupling of its chiral internal modes with integrated superconducting niobium cavities. We also probe experimentally the effective non-Hermitian dynamics of this system and its effective non-reciprocal eigenmodes.
  arXiv  Detail & Related papers  (2021-06-21T17:34:02Z)
• Intrinsic mechanisms for drive-dependent Purcell decay in superconducting quantum circuits [68.8204255655161]
  We find that in a wide range of settings, the cavity-qubit detuning controls whether a non-zero photonic population increases or decreases qubit decay Purcell. Our method combines insights from a Keldysh treatment of the system, and Lindblad theory.
  arXiv  Detail & Related papers  (2021-06-09T16:21:31Z)
• Electrically tuned hyperfine spectrum in neutral Tb(II)(Cp$^{\rm{iPr5}}$)$_2$ single-molecule magnet [64.10537606150362]
  Both molecular electronic and nuclear spin levels can be used as qubits. In solid state systems with dopants, an electric field was shown to effectively change the spacing between the nuclear spin qubit levels. This hyperfine Stark effect may be useful for applications of molecular nuclear spins for quantum computing.
  arXiv  Detail & Related papers  (2020-07-31T01:48:57Z)
• Long-Range Propagation and Interference of $d$-wave Superconducting Pairs in Graphene [0.0]
  Recent experiments have shown that proximity with high-temperature superconductors induces unconventional superconducting correlations in graphene. Here we demonstrate that those correlations propagate hundreds of nanometer, allowing for the unique observation of $d$-wave Andreev pair interferences in YBa$$Cu$_3$O$_7$-graphene devices.
  arXiv  Detail & Related papers  (2020-02-24T11:34:00Z)
• Optimal coupling of HoW$_{10}$ molecular magnets to superconducting circuits near spin clock transitions [85.83811987257297]
  We study the coupling of pure and magnetically diluted crystals of HoW$_10$ magnetic clusters to microwave superconducting coplanar waveguides. Results show that engineering spin-clock states of molecular systems offers a promising strategy to combine sizeable spin-photon interactions with a sufficient isolation from unwanted magnetic noise sources.
  arXiv  Detail & Related papers  (2019-11-18T11:03:06Z)

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.