通过聚焦氦离子辐照产生的具有周期性钉扎晶格的超导YBaCuO薄膜中的有序涡旋玻色玻璃

Ordered Bose Glass of Vortices in Superconducting YBaCuO Thin Films with a Periodic Pin Lattice Created by Focused Helium Ion Irradiation.

作者信息

Backmeister Lucas, Aichner Bernd, Karrer Max, Wurster Katja, Kleiner Reinhold, Goldobin Edward, Koelle Dieter, Lang Wolfgang

机构信息

Faculty of Physics, University of Vienna, A-1090 Wien, Austria.

Physikalisches Institut, Center for Quantum Science (CQ) and LISA+, Universität Tübingen, D-72076 Tübingen, Germany.

出版信息

Nanomaterials (Basel). 2022 Oct 6;12(19):3491. doi: 10.3390/nano12193491.

DOI:10.3390/nano12193491

PMID:36234619

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9565813/

Abstract

The defect-rich morphology of YBaCuO (YBCO) thin films leads to a glass-like arrangement of Abrikosov vortices which causes the resistance to disappear in vanishing current densities. This vortex glass consists of entangled vortex lines and is identified by a characteristic scaling of the voltage-current isotherms. Randomly distributed columnar defects stratify the vortex lines and lead to a Bose glass. Here, we report on the observation of an in a YBCO thin film with a hexagonal array of columnar defects with 30 nm spacings. The periodic pinning landscape was engineered by a focused beam of 30 keV He ions in a helium-ion microscope.

摘要

钇钡铜氧（YBCO）薄膜富含缺陷的形态导致阿布里科索夫涡旋呈类玻璃状排列，这使得电阻在电流密度消失时消失。这种涡旋玻璃由纠缠的涡旋线组成，并通过电压 - 电流等温线的特征标度来识别。随机分布的柱状缺陷使涡旋线分层，从而形成玻色玻璃。在此，我们报告在具有间距为30纳米的柱状缺陷六边形阵列的YBCO薄膜中观察到的一种情况。周期性钉扎态势是通过氦离子显微镜中30 keV的氦离子聚焦束设计而成。