Magnetic-field driven evolution of zero-energy mode on Bi islands deposited on Fe(Te,Se)

Abstract

We investigate the magnetic-field dependent evolution of the zero-bias conductance peaks (ZBCPs) on the nanoscale bismuth islands grown on the FeTe${}_{0.55}$Se${}_{0.45}$ substrate. The ZBCPs can be observed throughout the entire region on these islands, and their characteristics align with the signatures of Majorana zero modes. Remarkably, the evolution of ZBCPs on these islands exhibits anomalous behavior under varying magnetic fields: The magnitude of ZBCPs is first enhanced at weak fields lower than 2 T and then suppressed as the fields further increase. We attribute the non-monotonic evolution of the ZBCPs to the magnetic-field-enhanced topological edge states on these Bi islands. Our findings provide valuable insights into the probable origin of the Majorana zero modes in the Bi-island platform and the magnetic-field response of topological edge states.

arXiv comment6 pages, 4 figures

References in corpus (37)

• Topological Insulators
• Topological insulators and superconductors
• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Classification of topological insulators and superconductors in three spatial dimensions
• New directions in the pursuit of Majorana fermions in solid state systems
• Observation of Majorana Fermions in Ferromagnetic Atomic Chains on a Superconductor
• Topological superconductors: a review
• Majorana bound states in a coupled quantum-dot hybrid-nanowire system
• Scanning tunneling spectroscopy of high-temperature superconductors
• Higher-Order Topology in Bismuth
• Evidence for Majorana bound state in an iron-based superconductor
• Majorana mode in vortex core of Bi2Te3/NbSe2 topological insulator-superconductor heterostructure
• Three-dimensional charge density wave and robust zero-bias conductance peak inside the superconducting vortex core of a kagome superconductor CsV${}_3$Sb${}_5$
• One-dimensional Topological Edge States of Bismuth Bilayers
• Topological superconductivity in a van der Waals heterostructure
• Microscopic evidence for a chiral superconducting order parameter in the heavy fermion superconductor UTe2
• Zero-energy vortex bound state in the superconducting topological surface state of Fe(Se,Te)
• Observation of a Robust Zero-energy Bound State in Iron-based Superconductor Fe(Te,Se)
• Robust and clean Majorana zero mode in the vortex core of high-temperature superconductor (Li0.84Fe0.16)OHFeSe
• Two-dimensional topological superconductivity in Pb/Co/Si(111)
• Spectroscopic scanning tunneling microscopy insights into Fe-based superconductors
• Signature of Dispersing 1D Majorana Channels in an Iron-based Superconductor
• Atomic-Scale Interface Engineering of Majorana Edge Modes in a 2D Magnet-Superconductor Hybrid System
• Observation of a Majorana zero mode in a topologically protected edge channel
• Pauli-limited upper critical field in Fe1+yTe1-xSex
• Discrete energy levels of Caroli-de Gennes-Martricon states in quantum limit due to small Fermi energy in FeTe${}_{0.55}$Se${}_{0.45}$
• A new Majorana platform in an Fe-As bilayer superconductor
• Ordered and tunable Majorana-zero-mode lattice in naturally strained LiFeAs
• Evidence for Higher order topology in Bi and Bi${}_{0.92}$Sb${}_{0.08}$
• Topological quantum states of matter in iron-based superconductors: From concepts to material realization
• Observation of magnetic adatom-induced Majorana vortex and its hybridization with field-induced Majorana vortex in an iron-based superconductor
• Observation of robust zero-energy state and enhanced superconducting gap in a tri-layer heterostructure of MnTe/Bi2Te3/Fe(Te, Se)
• Zero-Energy Modes on Superconducting Bismuth Islands Deposited on Fe(Te,Se)
• Ferromagnetic Impurity Induced Majorana Zero Mode in Iron-Based Superconductor
• Stealth Majorana Zero Mode in a Trilayer Heterostructure MnTe/Bi2Te3/Fe(Te,Se)

Cited by in corpus (1)

• Majorana vortex phases in time-reversal invariant higher-order topological insulators and topologically trivial insulators