Zero-Energy Modes on Superconducting Bismuth Islands Deposited on Fe(Te,Se)

Abstract

Topological superconductivity is one of the frontier research directions in condensed matter physics. One of the unique elementary excitations in topological superconducting state is the Majorana fermion (mode) which is its own antiparticle and obeys the non-Abelian statistics, and thus useful for constructing the fault-tolerant quantum computing. The evidence for Majorana fermions (mode) in condensed matter state is now quickly accumulated. Here we report the easily achievable zero-energy mode on the tunneling spectra on Bi islands deposited on the Fe(Te,Se) superconducting single crystals. We interpret this result as the consequence of proximity effect induced topological superconductivity on the Bi islands with strong spin-orbital coupling effect. The zero-energy mode is argued to be the signature of the Majorana modes in this size confined system.

18 pages, 7 figures

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Cited by in corpus (7)

• Experimental review on Majorana zero-modes in hybrid nanowires
• Tunable vortex bound states in multiband CsV3Sb5-derived kagome superconductors
• Bulk Superconductivity in the Dirac Semimetal TlSb
• Superconductivity and vortex structure on Bi${}_2$Te${}_3$/FeTe${}_{0.55}$Se${}_{0.45}$ heterostructures with different thickness of Bi${}_2$Te${}_3$ films
• Magnetic-field driven evolution of zero-energy mode on Bi islands deposited on Fe(Te,Se)
• Quantum-size effect induced Andreev bound states in ultrathin metallic islands proximitized by a superconductor
• Majorana vortex phases in time-reversal invariant higher-order topological insulators and topologically trivial insulators