Proximity-induced high-temperature superconductivity in topological insulators Bi2Se3 and Bi2Te3

Abstract

Interest in the superconducting proximity effect has been reinvigorated recently by novel optoelectronic applications as well as by the possible emergence of the elusive Majorana fermion at the interface between topological insulators and superconductors. Here we produce high-temperature superconductivity in Bi2Se3 and Bi2Te3 via proximity to Bi2Sr2CaCu2O8+δ, in order to access increasing temperature and energy scales for this phenomenon. This was achieved by a new mechanical bonding technique we developed, enabling the fabrication of high-quality junctions between materials, unobtainable by conventional approaches. We observe proximity-induced superconductivity in Bi2Se3 and Bi2Te3 persisting up to at least 80K, a temperature an order of magnitude higher than any previous observations. Moreover, the induced superconducting gap in our devices reaches values of 10mV, significantly enhancing the relevant energy scales. Our results open new directions for fundamental studies in condensed matter physics and enable a wide range of applications in spintronics and quantum computing.

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Cited by in corpus (101)

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• Majorana corner and hinge modes in second-order topological insulator-superconductor heterostructures
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• A comprehensive review on topological superconducting materials and interfaces
• Presence of $s$-wave pairing in Josephson junctions made of twisted ultrathin Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+x}$ flakes
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• Anomalous Supercurrent from Majorana States in Topological Insulator Josephson Junctions
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• Search for superconducting proximity effect in a topological insulator and high temperature superconductor heterostructure Bi2Se3/Bi2Sr2CaCu2O8+
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• Advantages of using YBCO-Nanowire-YBCO heterostructures in the search for Majorana Fermions
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• Robust two-dimensional superconductivity and vortex system in Bi2Te3/FeTe heterostructures
• Pressure-induced superconductivity in weak topological insulator BiSe
• Andreev Reflection and Klein Tunneling in High-Temperature Superconductor/Graphene Junctions
• Electrically controllable spin filtering based on superconducting helical states
• Twofold symmetry of proximity-induced superconductivity in Bi${}_2$Te${}_3$/Bi${}_2$Sr${}_2$CaCu${}_2$O${}_{8+\delta }$ heterostructures revealed by scanning tunneling microscopy
• Controversy over large proximity induced s wave like pairing from a d wave superconductor
• Size Constraints on Majorana Beamsplitter Interferometer: Majorana Coupling and Surface-Bulk Scattering
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• Localization and oscillations of Majorana fermions in a two-dimensional electron gas coupled with $d$-wave superconductors
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• Coulomb Blockade Effects in a Topological Insulator Grown on a High-Tc Cuprate Superconductor
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• Evidence for a New Excitation at the Interface Between a High-Tc Superconductor and a Topological Insulator
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• Quasiparticle interference and resonant states in normal and superconducting line nodal semimetals
• Proximity effect in a heterostructure of a high $T_c$ superconductor with a topological insulator from Dynamical mean field theory
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