Proximity-induced superconductivity and quantum interference in topological crystalline insulator SnTe thin film devices

Abstract

Topological crystalline insulators represent a new state of matter, in which the electronic transport is governed by mirror-symmetry protected Dirac surface states. Due to the helical spin-polarization of these surface states, the proximity of topological crystalline matter to a nearby superconductor is predicted to induce unconventional superconductivity and thus to host Majorana physics. We report on the preparation and characterization of Nb-based superconducting quantum interference devices patterned on top of topological crystalline insulator SnTe thin films. The SnTe films show weak antilocalization and the weak links of the SQUID fully-gapped proximity induced superconductivity. Both properties give a coinciding coherence length of 120 nm. The SQUID oscillations induced by a magnetic field show 2$\pi$ periodicity, possibly dominated by the bulk conductivity.

References in corpus (29)

• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Topological Crystalline Insulators in the SnTe Material Class
• Experimental realization of a topological crystalline insulator in SnTe
• Topological Crystalline Insulators and Topological Superconductors: From Concepts to Materials
• Topology of crystalline insulators and superconductors
• Impurity effect on weak anti-localization in the topological insulator Bi2Te3
• $4\pi$-periodic Josephson supercurrent in HgTe-based topological Josephson junctions
• Weak antilocalization in epitaxial graphene: evidence for chiral electrons
• Gapless Andreev bound states in the quantum spin Hall insulator HgTe
• Observation of Dirac node formation and mass acquisition in a topological crystalline insulator
• Proximity effect at the superconductor - topological insulator interface
• Topological Mirror Superconductivity
• Robust spin-polarized midgap states at step edges of topological crystalline insulators
• Evidence for an anomalous current phase relation in topological insulator Josephson junctions
• Two types of Dirac-cone surface states on (111) surface of topological crystalline insulator SnTe
• Strain engineering Dirac surface states in heteroepitaxial topological crystalline insulator thin films
• Fermiology of Strongly Spin-Orbit Coupled Superconductor Sn1-xInxTe and its Implication to Topological Superconductivity
• Superconducting properties of the In substituted Topological Crystalline Insulator, SnTe
• Quantum Coherent Transport in SnTe Topological Crystalline Insulator Thin Films
• Josephson supercurrent through the topological surface states of strained bulk HgTe
• Experimental realization of SQUIDs with topological insulator junctions
• Revealing surface states in In-doped SnTe superconducting nanoplates with low bulk mobility
• Two-dimensional quantum transport of multivalley (111) surface state in topological crystalline insulator SnTe thin films
• Time-reversal anomaly and Josephson effect in time-reversal invariant topological superconductors
• Surface electronic state of superconducting topological crystalline insulator
• Phase-sensitive SQUIDs based on the 3D topological insulator HgTe
• Superconducting Sn_{1-x}In_{x}Te Nanoplates
• Large linear magnetoresistance and weak anti-localization in Y(Lu)PtBi topological insulators
• Origin of Hysteresis in a Proximity Josephson Junction

Cited by in corpus (5)

• Transport in two-dimensional topological materials: recent developments in experiment and theory
• Spin-orbit insulating phase in SnTe cubic nanowires: consequences on the topological surface states
• Superconducting Quantum Interference Devices Made of Sb-doped Bi2Se3 Topological Insulator Nanoribbons
• RF compressibility of topological surface and interface states in metal-hBN-Bi2Se3 capacitors
• Proximity-Induced Superconductivity in a Topological Crystalline Insulator