Current-phase Relationship, Thermal and Quantum Phase Slips in Superconducting Nanowires made on Scaffold Created using Adhesive Tape

Abstract

Quantum phase slippage (QPS) in a superconducting nanowire is a new candidate for developing a quantum bit. It has also been theoretically predicted that the occurrence of QPS significantly changes the current-phase relationship (CPR) of the wire due to the tunneling between topologically different metastable states. We present studies on the microwave response of the superconducting nanowires to reveal their CPRs. First, we demonstrate a simple nanowire fabrication technique, based on commercially available adhesive tapes, which allows making thin superconducting wire from different metals. We compare the resistance vs. temperature curves of Mo${}_{76}$Ge${}_{24}$ and Al nanowires to the classical and quantum models of phase slips. In order to describe the experimentally observed microwave responses of these nanowires, we use the McCumber-Stewart model, which is generalized to include either classical or quantum CPR.

to be published in Nano Letters

References in corpus (7)

• Half-integer Shapiro steps at the 0-pi crossover of a ferromagnetic Josephson junction
• Quantum fluctuations in ultranarrow superconducting nanowires
• Quasi-Particle Dynamics in Superconducting Aluminum
• Fractional Order Shapiro Steps in Superconducting Nanowires
• Sharp Superconductor-Insulator Transition in Short Wires
• Quantum mechanics of superconducting nanowires
• Quantum phase slips in a confined geometry

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• Nonlinear current-voltage characteristics due to quantum tunneling of phase slips in superconducting Nb nanowire networks
• Application of largest Lyapunov exponent analysis on the studies of dynamics under external forces
• Probing Topological Superconductivity of oxide nanojunctions using fractional Shapiro steps
• Superconducting nanowire quantum interference device based on Nb ultrathin films deposited on self-assembled porous Si templates
• Phase locking and fractional Shapiro steps in collective dynamics of microparticles
• Complexity of Shapiro steps
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• Slow electron-phonon relaxation controls the dynamics of the superconducting resistive transition
• The largest Lyapunov exponent as a tool for detecting relative changes in the particle positions