Observation of Superconductivity Induced Ferromagnetism in an Fe-Chalcogenide Superconductor

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.

12 pages, 4 figures

References in corpus (8)

• PyTorch: An Imperative Style, High-Performance Deep Learning Library
• Non-Abelian Anyons and Topological Quantum Computation
• Probing magnetism in 2D materials at the nanoscale with single spin microscopy
• Pairing State with a time-reversal symmetry breaking in FeAs based superconductors
• Evidence for Helical Hinge Zero Modes in an Fe-Based Superconductor
• Electrical Control of Coherent Spin Rotation of a Single-Spin Qubit
• On the interplay of paramagnetism and topology in the Fe-based High Tc Superconductors
• Observation of robust edge superconductivity in Fe(Se,Te) under strong magnetic perturbation

Cited by in corpus (22)

• Quantum sensing and imaging of spin-orbit-torque-driven spin dynamics in noncollinear antiferromagnet Mn3Sn
• Quantum Imaging of Magnetic Phase Transitions and Spin Fluctuations in Intrinsic Magnetic Topological Nanoflakes
• Above-room-temperature ferromagnetism in ultrathin van der Waals magnet
• Revealing the Origin of Time-reversal Symmetry Breaking in Fe-chalcogenide Superconductor FeTe1-xSex
• Phase-manipulation-induced Majorana Mode and Braiding Realization in Iron-based Superconductor Fe(Te,Se)
• Spectroscopy Study on NV Sensors in Diamond-based High-pressure Devices
• Origin of Topological Surface Superconductivity in FeSe${}_{0.45}$Te${}_{0.55}$
• Imaging current control of magnetization in Fe${}_3$GeTe${}_2$ with a widefield nitrogen-vacancy microscope
• Direct observation of quantum anomalous vortex in Fe(Se,Te)
• Electric-Field-Induced Coherent Control of Nitrogen Vacancy Centers
• Towards high spatial resolution magnetic imaging with a compact practical quantum diamond microscope
• Aberration control in quantitative widefield quantum microscopy
• Shot-noise and differential conductance as signatures of putative topological superconductivity in FeSe${}_{0.45}$Te${}_{0.55}$
• Microscopic origin of ultranodal superconducting states in spin-1/2 systems
• Competing topological superconducting phases in FeSe${}_{0.45}$Te${}_{0.55}$
• High quality Fe1+yTe synthesized by chemical vapor deposition with conspicuous vortex flow
• Studying Critical Parameters of Superconductor via Diamond Quantum Sensors
• Widefield quantum microscopy with nitrogen-vacancy centers in diamond: strengths, limitations, and prospects
• Widefield NV Magnetic Field Reconstruction for Probing the Meissner Effect and Critical Current Density under Pressure
• In-situ local imaging of ferromagnetism and superconductivity in RbEuFe${}_4$As${}_4$
• Optically induced static magnetic field in ensemble of nitrogen-vacancy centers in diamond
• Potentiometric detection of spin polarization expected at the surface of FeTe0.6Se0.4 in the effective p-wave superconducting state