In-plane ferromagnetism-driven topological nodal-point superconductivity with tilted Weyl cones

• URL: http://arxiv.org/abs/2601.03929v1
• Date: Wed, 07 Jan 2026 13:48:56 GMT
• Title: In-plane ferromagnetism-driven topological nodal-point superconductivity with tilted Weyl cones
• Authors: Maciej Bazarnik, Levente Rózsa, Ioannis Ioannidis, Eric Mascot, Philip Beck, Krisztián Palotás, András Deák, László Szunyogh, Stephan Rachel, Thore Posske, Roland Wiesendanger, Jens Wiebe, Kirsten von Bergmann, Roberto Lo Conte,
• Abstract summary: We report evidence of a topological nodal-point superconducting phase in a one-atom-thick in-plane ferromagnet in direct proximity to a conventional $s$-wave superconductor.<n>Results establish the combination of in-plane ferromagnetism and conventional superconductivity as a route to design two-dimensional topological quantum phases.
• Score: 0.0
• License: http://creativecommons.org/licenses/by-nc-nd/4.0/
• Abstract: The potential application of topological superconductivity in quantum transport and quantum information has fueled an intense investigation of hybrid materials with emergent electronic properties, including magnet-superconductor heterostructures. Here, we report evidence of a topological nodal-point superconducting phase in a one-atom-thick in-plane ferromagnet in direct proximity to a conventional $s$-wave superconductor. Low-temperature scanning tunneling spectroscopy data reveal the presence of a double-peak low-energy feature in the local density of states of the hybrid system, which is rationalized via model calculations to be an emergent topological nodal-point superconducting phase with tilted Weyl cones. Our results further establish the combination of in-plane ferromagnetism and conventional superconductivity as a route to design two-dimensional topological quantum phases.

Related papers

• High magnetic field response of superconductivity dome in quantum artificial High Tc superlattices with variable geometry [0.731365367571807]
  We report high-field magneto transport measurements up to 41 Tesla of AHTS across the entire superconducting dome.<n>The measured superconducting coherence length demonstrates that atomic-scale engineering controls not only the critical temperature but also the intrinsic pair size at Fano-Feshbach resonances physics.
  arXiv  Detail & Related papers  (2025-12-12T11:42:35Z)
• Controllable and Continuous Quantum Phase Transitions in Intrinsic Magnetic Topological Insulator [50.54133633499971]
  We study the intrinsic magnetic topological material MnBi2Te4 in which the heavy n-type doping features are strongly suppressed.<n>Based on angle-resolved photoemission spectroscopy, transport measurements, and first-principles calculations, we reveal two magnetism-induced TPTs.<n>Our work paves the way for the realization of intrinsic magnetic topological states in MnBi2Te4 family and provides an ideal platform for achieving controllable and continuous TPTs.
  arXiv  Detail & Related papers  (2025-03-08T03:46:54Z)
• 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)
• Proximity-induced gapless superconductivity in two-dimensional Rashba semiconductor in magnetic field [0.0]
  We introduce a theoretical model describing a disordered semiconductor with strong spin-orbit coupling. Our model provides predictions for the density of states and superfluid density. Our model can be used to probe in-situ parameters of other superconductor-semiconductor heterostructures.
  arXiv  Detail & Related papers  (2023-11-15T20:10:17Z)
• Fragmented superconductivity in the Hubbard model as solitons in Ginzburg-Landau theory [39.58317527488534]
  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)
• Negative electrohydrostatic pressure between superconducting bodies [39.58317527488534]
  We predict a negative (attractive) pressure between planar superconducting bodies. The resulting surface energies are in better agreement than those predicted by the Hartree-Fock theory. The model circumvents the bulk limitations of the Bardeen-Cooper-Schrieffer and Ginzburg-Landau theories.
  arXiv  Detail & Related papers  (2023-07-10T21:08:22Z)
• 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)
• Anomalous Floquet Chiral Topological Superconductivity in a Topological Insulator Sandwich Structure [0.0]
  We show that Floquet chiral topological superconductivity arises naturally in Josephson junctions made of magnetic topological insulator-superconductor sandwich structures. The bias voltage acts as a tuning parameter enabling novel dynamical topological quantum phase transitions. Our theory establishes a new paradigm for realizing Floquet chiral topological superconductivity in solid-state systems.
  arXiv  Detail & Related papers  (2020-12-01T19:00:01Z)
• 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)
• Experimental evidence for topological phases in the magnetoconductance of 2DEG-based hybrid junctions [0.0]
  Majorana phases emerge as quantized plateaus in the magnetoconductance of hybrid junctions based on two-dimensional electron gases (2DEG) under fully out-of-plane magnetic fields. We report on the experimental observation of such topological phases in Josephson junctions, based on In0.75Ga0.25As 2DEG, by sweeping out-of-plane magnetic fields of as small as 0 B(mT) 100.
  arXiv  Detail & Related papers  (2020-07-04T09:53:13Z)
• Waveguide Bandgap Engineering with an Array of Superconducting Qubits [101.18253437732933]
  We experimentally study a metamaterial made of eight superconducting transmon qubits with local frequency control. We observe the formation of super- and subradiant states, as well as the emergence of a polaritonic bandgap. The circuit of this work extends experiments with one and two qubits towards a full-blown quantum metamaterial.
  arXiv  Detail & Related papers  (2020-06-05T09:27:53Z)
• Quantum electrodynamics in a topological waveguide [47.187609203210705]
  In this work we investigate the properties of superconducting qubits coupled to a metamaterial waveguide based on a photonic analog of the Su-Schrieffer-Heeger model. We explore topologically-induced properties of qubits coupled to such a waveguide, ranging from the formation of directional qubit-photon bound states to topology-dependent cooperative radiation effects.
  arXiv  Detail & Related papers  (2020-05-08T00:22:17Z)

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.