Imaging pinning and expulsion of individual superconducting vortices in amorphous MoSi thin films

被引：15

作者：

Ceccarelli, L. ^{[1
]}

Vasyukov, D. ^{[1
]}

Wyss, M. ^{[1
,2
]}

Romagnoli, G. ^{[1
]}

Rossi, N. ^{[1
,2
]}

Moser, L. ^{[1
]}

Poggio, M. ^{[1
,2
]}

机构：

[1] Univ Basel, Dept Phys, CH-4056 Basel, Switzerland

[2] Univ Basel, Swiss Nanosci Inst, CH-4056 Basel, Switzerland

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 10期

基金：

瑞士国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.100.104504

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We use a scanning nanometer-scale superconducting quantum interference device (SQUID) to image individual vortices in amorphous superconducting MoSi thin films. Spatially resolved measurements of the magnetic field generated by both vortices and Meissner screening satisfy the Pearl model for vortices in thin films and yield values for the Pearl length and bulk penetration depth at 4.2 K. Flux pinning is observed and quantified through measurements of vortex motion driven by both applied currents and thermal activation. The effects of pinning are also observed in metastable vortex configurations, which form as the applied magnetic field is reduced and magnetic flux is expelled from the film. Understanding and controlling vortex dynamics in amorphous thin films is crucial for optimizing devices such as superconducting nanowire single photon detectors (SNSPDs), the most efficient of which are made from MoSi, WSi, and MoGe.

引用

收藏

页数：9

相关论文

共 34 条

[1]

Auslaender OM, 2009, NAT PHYS, V5, P35, DOI [10.1038/nphys1127, 10.1038/NPHYS1127]

[2] Two regimes of vortex penetration into platelet-shaped type-II superconductors [J].

Brandt, E. H. ;

Mikitik, G. P. ;

Zeldov, E. .

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS, 2013, 117 (03) :439-448

[3] Geometric barrier and current string in type-II superconductors obtained from continuum electrodynamics [J].

Brandt, EH .

PHYSICAL REVIEW B, 1999, 59 (05) :3369-3372

[4] Determination of the magnetic penetration depth in a superconducting Pb film [J].

Brisbois, J. ;

Raes, B. ;

Van de Vondel, J. ;

Moshchalkov, V. V. ;

Silhanek, A. V. .

JOURNAL OF APPLIED PHYSICS, 2014, 115 (10)

[5] High-detection efficiency and low-timing jitter with amorphous superconducting nanowire single-photon detectors [J].

Caloz, Misael ;

Perrenoud, Matthieu ;

Autebert, Claire ;

Korzh, Boris ;

Weiss, Markus ;

Schonenberger, Christian ;

Warburton, Richard J. ;

Zbinden, Hugo ;

Bussieres, Felix .

APPLIED PHYSICS LETTERS, 2018, 112 (06)

[6] Vortex lines in films: Fields and interactions [J].

Carneiro, G ;

Brandt, EH .

PHYSICAL REVIEW B, 2000, 61 (09) :6370-6376

[7] Magnetic field-induced dissipation-free state in superconducting nanostructures [J].

Cordoba, R. ;

Baturina, T. I. ;

Sese, J. ;

Mironov, A. Yu ;

De Teresa, J. M. ;

Ibarra, M. R. ;

Nasimov, D. A. ;

Gutakovskii, A. K. ;

Latyshev, A. V. ;

Guillamon, I. ;

Suderow, H. ;

Vieira, S. ;

Baklanov, M. R. ;

Palacios, J. J. ;

Vinokur, V. M. .

NATURE COMMUNICATIONS, 2013, 4

[8] Imaging of super-fast dynamics and flow instabilities of superconducting vortices [J].

Embon, L. ;

Anahory, Y. ;

Jelic, Z. L. ;

Lachman, E. O. ;

Myasoedov, Y. ;

Huber, M. E. ;

Mikitik, G. P. ;

Silhanek, A. V. ;

Milosevic, M. V. ;

Gurevich, A. ;

Zeldov, E. .

NATURE COMMUNICATIONS, 2017, 8

[9] Probing dynamics and pinning of single vortices in superconductors at nanometer scales [J].

Embon, L. ;

Anahory, Y. ;

Suhov, A. ;

Halbertal, D. ;

Cuppens, J. ;

Yakovenko, A. ;

Uri, A. ;

Myasoedov, Y. ;

Rappaport, M. L. ;

Huber, M. E. ;

Gurevich, A. ;

Zeldov, E. .

SCIENTIFIC REPORTS, 2015, 5

[10] Detection Mechanism in SNSPD: Numerical Results of a Conceptually Simple, Yet Powerful Detection Model [J].

Engel, Andreas ;

Lonsky, Julia ;

Zhang, Xiaofu ;

Schilling, Andreas .

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 2015, 25 (03)

← 1 2 3 4 →