YBa2Cu3O7-delta nanorings to probe fluxoid quantization in High Critical Temperature Superconductors
Artikel i vetenskaplig tidskrift, 2014

We have realized YBa2Cu3O7-delta (YBCO) nanorings and measured the magnetoresistance R(B) close to the superconducting transition. The large oscillations that we have measured can be interpreted in terms of vortex dynamics triggering the nanowires to the resistive state. The Fast Fourier Transform spectrum of the magnetoresistance oscillations shows a single sharp peak for nanorings with narrower loop arm width: this peak can be univocally associated to a h/2e periodicity as predicted for optimally doped YBCO. Moreover it is a clear evidence of a uniform vorticity of the order parameter inside the rings, confirming a high degree of homogeneity of our nanostructures. This result gives a boost to further investigations of YBCO nanorings at different dopings within the superconducting dome, where in the underdoped regime a R(B) periodicity different from the conventional h/2e has been predicted.

High-temperature superconductors

Fluxoid quantization

Nanorings

Vortex dynamics

Författare

Riccardo Arpaia

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Sophie Charpentier

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

R. Toskovic

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Thilo Bauch

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Floriana Lombardi

Chalmers, Mikroteknologi och nanovetenskap (MC2), Kvantkomponentfysik

Physica C: Superconductivity and its Applications

0921-4534 (ISSN)

Vol. 506 184-187

Ämneskategorier

Atom- och molekylfysik och optik

DOI

10.1016/j.physc.2014.06.015

Mer information

Skapat

2017-10-07