Observation of Superconductivity Induced Ferromagnetism in an Fe-Chalcogenide Superconductor

• URL: http://arxiv.org/abs/2106.15882v1
• Date: Wed, 30 Jun 2021 08:15:58 GMT
• Title: Observation of Superconductivity Induced Ferromagnetism in an Fe-Chalcogenide Superconductor
• Authors: Nathan J. McLaughlin, Hailong Wang, Mengqi Huang, Eric Lee-Wong, Lunhui Hu, Hanyi Lu, Gerald Q. Yan, G. D. Gu, Congjun Wu, Yi-Zhuang You, Chunhui Rita Du
• Abstract summary: We report nanoscale quantum sensing and imaging of magnetic flux generated by exfoliated FeTexSe1-x flakes. The coexistence of superconductivity and ferromagnetism in an established topological superconductor opens up new opportunities for exploring exotic spin and charge transport phenomena in quantum materials.
• Score: 0.44940580193534013
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The interplay among topology, superconductivity, and magnetism promises to bring a plethora of exotic and unintuitive behaviors in emergent quantum materials. The family of Fe-chalcogenide superconductors FeTexSe1-x are directly relevant in this context due to their intrinsic topological band structure, high-temperature superconductivity, and unconventional pairing symmetry. Despite enormous promise and expectation, the local magnetic properties of FeTexSe1-x remain largely unexplored, which prevents a comprehensive understanding of their underlying material properties. Exploiting nitrogen vacancy (NV) centers in diamond, here we report nanoscale quantum sensing and imaging of magnetic flux generated by exfoliated FeTexSe1-x flakes, providing clear evidence of superconductivity-induced ferromagnetism in FeTexSe1-x. The coexistence of superconductivity and ferromagnetism in an established topological superconductor opens up new opportunities for exploring exotic spin and charge transport phenomena in quantum materials. The demonstrated coupling between NV centers and FeTexSe1-x may also find applications in developing hybrid architectures for next-generation, solid-state-based quantum information technologies.

Related papers

• Transport properties and quantum phase transitions in one-dimensional superconductor-ferromagnetic insulator heterostructures [44.99833362998488]
  We propose a one-dimensional electronic nanodevice inspired in recently fabricated semiconductor-superconductor-ferromagnetic insulator hybrids. We show that the device can be tuned across spin- and fermion parity-changing QPTs by adjusting the FMI layer length orange and/or by applying a global backgate voltage. Our findings suggest that these effects are experimentally accessible and offer a robust platform for studying quantum phase transitions in hybrid nanowires.
  arXiv  Detail & Related papers  (2024-10-18T22:25:50Z)
• Superfluid Stiffness and Flat-Band Superconductivity in Magic-Angle Graphene Probed by cQED [0.32018750515900324]
  Superconductivity in magic-angle twisted bilayer graphene (MATBG) is a topic of keen interest in moir'e systems research. We use DC-transport and microwave circuit quantum electrodynamics to measure directly the superfluid stiffness of MATBG. Our findings indicate that MATBG is an unconventional superconductor with an anisotropic gap and strongly suggest a connection between quantum geometry, superfluid stiffness, and unconventional superconductivity.
  arXiv  Detail & Related papers  (2024-06-19T18:00:02Z)
• Quantum thermodynamics with a single superconducting vortex [44.99833362998488]
  We demonstrate complete control over dynamics of a single superconducting vortex in a nanostructure. Our device allows us to trap the vortex in a field-cooled aluminum nanosquare and expel it on demand with a nanosecond pulse of electrical current.
  arXiv  Detail & Related papers  (2024-02-09T14:16:20Z)
• Imaging magnetism evolution of magnetite to megabar pressure range with quantum sensors in diamond anvil cell [57.91882523720623]
  We develop an in-situ magnetic detection technique at megabar pressures with high sensitivity and sub-microscale spatial resolution. We observe the macroscopic magnetic transition of Fe3O4 in the megabar pressure range from strong ferromagnetism (alpha-Fe3O4) to weak ferromagnetism (beta-Fe3O4) and finally to non-magnetism (gamma-Fe3O4) The presented method can potentially investigate the spin-orbital coupling and magnetism-superconductivity competition in magnetic systems.
  arXiv  Detail & Related papers  (2023-06-13T15:19:22Z)
• Topological Superconductivity in Two-Dimensional Altermagnetic Metals [1.779681639954815]
  We study the effect of altermagnetism on the superconductivity of a two-dimensional metal with d-wave altermagnetism and Rashba spin-orbital coupling. We show that a number of topological superconductors, including both first-order and second-order ones, can emerge when the p-wave pairing dominates.
  arXiv  Detail & Related papers  (2023-05-17T18:00:00Z)
• Quantum phase transition in magnetic nanographenes on a lead superconductor [21.166883497183687]
  Quantum spins are proposed to host exotic interactions with superconductivity. Magnetic nanographenes have been proven to host intrinsic quantum magnetism due to their negligible spin orbital coupling and crystal field splitting. We fabricate three atomically precise nanographenes with the same magnetic ground state of spin S=1/2 on Pb (111) through engineering sublattice imbalance in graphene honeycomb lattice.
  arXiv  Detail & Related papers  (2022-07-12T04:52:02Z)
• Microscopic Theory of Magnetic Disorder-Induced Decoherence in Superconducting Nb Films [0.0]
  We develop an ab initio Shiba theory to investigate the microscopic origin of magnetic-induced decoherence in niobium thin film superconductors. Our ab initio calculations encompass the roles of structural disorder, stoichiometry, and strain on the formation of decoherence-inducing local spin moments.
  arXiv  Detail & Related papers  (2021-11-23T07:08:20Z)
• Relativistic aspects of orbital and magnetic anisotropies in the chemical bonding and structure of lanthanide molecules [60.17174832243075]
  We study the electronic and ro-vibrational states of heavy homonuclear lanthanide Er2 and Tm2 molecules by applying state-of-the-art relativistic methods. We were able to obtain reliable spin-orbit and correlation-induced splittings between the 91 Er2 and 36 Tm2 electronic potentials dissociating to two ground-state atoms.
  arXiv  Detail & Related papers  (2021-07-06T15:34:00Z)
• Quantum Sensors for Microscopic Tunneling Systems [58.720142291102135]
  tunneling Two-Level-Systems (TLS) are important for micro-fabricated quantum devices such as superconducting qubits. We present a method to characterize individual TLS in virtually arbitrary materials deposited as thin-films. Our approach opens avenues for quantum material spectroscopy to investigate the structure of tunneling defects.
  arXiv  Detail & Related papers  (2020-11-29T09:57:50Z)
• 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)
• Flexible Amorphous Superconducting Materials and Quantum Devices with Unexpected Tunability [0.0]
  Superconducting films, nanowires and quantum interference devices (SQUIDs) were fabricated under variable magnetic-field, current, temperature and flexure conditions. Our work paves the way for novel magnetic devices and quantum-technology platforms with local tunability.
  arXiv  Detail & Related papers  (2020-02-24T14:58:37Z)

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.