Improved noise performance of ultrathin YBCO Dayem bridge nanoSQUIDs
Artikel i vetenskaplig tidskrift, 2017

We have fabricated YBa2Cu3O7-delta (YBCO) nano superconducting quantum interference devices (nanoSQUIDs), realized in Dayem bridge configuration, on films with thickness down to 10 nm. The devices, which have not been protected by a Au capping layer during the nanopatterning, show modulations of the critical current as a function of the externally applied magnetic field from 300 mK up to the critical temperature of the nanobridges. The absence of the Au shunting layer and the enhancement of the sheet resistance in ultrathin films lead to very large voltage modulations and transfer functions, which make these nanoSQUIDs highly sensitive devices. Indeed, by using bare YBCO nanostructures, we have revealed an upper limit for the intrinsic white flux noise level S-Phi,w(1/2) < 450 n Phi(0) Hz(-1/2).

high critical temperature superconductors

YBCO

nanobridges

nano superconducting quantum interference devices

Författare

Riccardo Arpaia

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Marco Arzeo

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Reza Baghdadi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Edoardo Trabaldo

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Floriana Lombardi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Thilo Bauch

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Superconductor Science and Technology

0953-2048 (ISSN) 1361-6668 (eISSN)

Vol. 30 1

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1088/0953-2048/30/1/014008

Mer information

Skapat

2017-10-07