Transport properties of ultrathin YBa2Cu3O7-delta nanowires: A route to single-photon detection
Artikel i vetenskaplig tidskrift, 2017

We report on the growth and characterization of ultrathin YBa2Cu3O7-delta (YBCO) films on MgO (110) substrates, which exhibit superconducting properties at thicknesses down to 3 nm. YBCO nanowires, with thicknesses down to 10 nm and widths down to 65 nm, have also been successfully fabricated. The nanowires protected by a Au capping layer showsuperconducting properties close to the as-grown films and critical current densities, which are limited by only vortex dynamics. The 10-nm-thick YBCO nanowires without the Au capping present hysteretic current-voltage characteristics, characterized by a voltage switch which drives the nanowires directly from the superconducting to the normal state. We associate such bistability to the presence of localized normal domains within the superconductor. The presence of the voltage switch in ultrathin YBCO nanostructures, characterized by high sheet resistance values and high critical current values, makes our nanowires very attractive devices to engineer single-photon detectors.

Kosterlitz-Thouless Transition

High-TC Superconductors

Dynamics

Superlattices

High-Temperature Superconductors

Thin-Film

Thickness Dependence

YBCO

Growth

TL2BA2CUO6+Delta

Författare

[Person 1a02ed7e-9058-40d0-a736-2a72fcab61ba not found]

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

[Person 47149239-c11f-4d2e-b648-f807db76a1f2 not found]

[Person 54200cbe-9038-4532-8d99-f3497b75f181 not found]

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

[Person a6c52f9a-df40-49da-b6ce-65ff999ccbf2 not found]

[Person f91bb9d9-147a-4d16-828b-9f6baebe2b8b not found]

[Person 95d48051-ff97-4f03-931e-9e3f53bc1113 not found]

[Person d4c0fe66-0f2c-4d20-bafe-afdc4901ecc8 not found]

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

[Person 4aed0637-71bf-4b4d-afd1-e22ee210ef1d not found]

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

[Person e3d71f5c-4cac-4e2e-a51b-e35d7a49b44b not found]

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Physical Review B

2469-9950 (ISSN)

Vol. 96 6 Article no 064525-

Ämneskategorier

Fysik

DOI

10.1103/PhysRevB.96.064525

Mer information

Skapat

2017-10-07