Superconductivity in a van der Waals layered quasicrystal

Abstract

van der Waals (vdW) layered transition-metal chalcogenides are attracting significant attention owing to their fascinating physical properties. This group of materials consists of abundant members with various elements, having a variety of different structures. However, all vdW layered materials studied to date have been limited to crystalline materials, and the physical properties of vdW layered quasicrystals have not yet been reported. Here, we report on the discovery of superconductivity in a vdW layered quasicrystal of Ta1.6Te. The electrical resistivity, magnetic susceptibility, and specific heat of the Ta1.6Te quasicrystal fabricated by reaction sintering, unambiguously validated the occurrence of bulk superconductivity at a transition temperature of ~1 K. This discovery can pioneer new research on assessing the physical properties of vdW layered quasicrystals as well as two-dimensional quasicrystals; moreover, it paves the way toward new frontiers of superconductivity in thermodynamically stable quasicrystals, which has been the predominant challenge facing condensed matter physics since the discovery of quasicrystals almost four decades ago.

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• Quasiperiodic pairing in graphene quasicrystals
• Self-consistent study of topological superconductivity in two-dimensional quasicrystals
• Hyperuniform properties of the square-triangle tilings
• Superconductivity and charge-density-wave in the Holstein model on the Penrose Lattice
• Weyl superconductivity and quasiperiodic Majorana arcs in quasicrystals
• Quasiperiodicity-induced enhancement of superconductivity in one-dimensional critical systems
• Gapless superconductivity and its real-space topology in quasicrystals
• Brillouin zone folding method for quasiperiodic superconductivity in multilayer systems: application to electronic structure and optical responses
• Mott transition and correlation effects on strictly localized states in an octagonal quasicrystal
• First-principles evidence for conventional superconductivity in a quasicrystal approximant
• Superconducting Properties on Two-dimensional Quasicrystal (Ta${}_{0.95}$Cu${}_{0.05}$)${}_{1.6}$Te Studied with ${}^{125}$Te-NMR
• Site-selective correlations in interacting "flat-band" quasicrystals
• Superconducting order parameter in aperiodic binary systems