Experimental test of strong pinning and creep in current-voltage characteristics of type-II superconductors

被引：7

作者：

Buchacek, M. ^{[1
]}

Xiao, Z. L. ^{[2
]}

Dutta, S. ^{[3
]}

Andrei, E. Y. ^{[4
]}

Raychaudhuri, P. ^{[3
]}

Geshkenbein, V. B. ^{[1
]}

Blatter, G. ^{[1
]}

机构：

[1] EIH Zurich, Inst Theoret Phys, CH-8093 Zurich, Switzerland

[2] Argonne Natl Lab, Mat Sci Div, Lemont, IL 60439 USA

[3] Tata Inst Fundamental Res, Homi Bhabha Rd, Mumbai 400005, Maharashtra, India

[4] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08855 USA

来源：

PHYSICAL REVIEW B | 2019年 / 100卷 / 22期

基金：

美国国家科学基金会; 瑞士国家科学基金会;

关键词：

FLUX-CREEP; MOTION; VORTICES;

D O I：

10.1103/PhysRevB.100.224502

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pinning and creep determine the current-voltage characteristics of a type-II superconductor and thereby its potential for technological applications. The recent development of strong pinning theory provides us with a tool to assess a superconductor's electric properties in a quantitative way. Motivated by the observation of typical excess-current characteristics and field scaling of critical currents, here we analyze current-voltage characteristics measured on 2H-NbSe2 and a-MoGe type-II superconductors within the setting provided by strong pinning theory. The experimentally observed shift and rounding of the voltage onset is consistent with the predictions of strong pinning in the presence of thermal fluctuations. We find the underlying parameters determining pinning and creep and discuss their consistency.

引用

页数：11

共 17 条

[1] Strong pinning theory of thermal vortex creep in type-II superconductors
Buchacek, M.
Willa, R.
Geshkenbein, V. B.
Blatter, G.
PHYSICAL REVIEW B, 2019, 100 (01)
[2] Vortex dynamics in type-II superconductors under strong pinning conditions
Thomann, A. U.
Geshkenbein, V. B.
Blatter, G.
PHYSICAL REVIEW B, 2017, 96 (14)
[3] Campbell Response in Type-II Superconductors under Strong Pinning Conditions
Willa, R.
Geshkenbein, V. B.
Prozorov, R.
Blatter, G.
PHYSICAL REVIEW LETTERS, 2015, 115 (20)
[4] Dynamical Aspects of Strong Pinning of Magnetic Vortices in Type-II Superconductors
Thomann, A. U.
Geshkenbein, V. B.
Blatter, G.
PHYSICAL REVIEW LETTERS, 2012, 108 (21)
[5] Microwave response of type-II superconductors at weak pinning
V. Pashinsky, B.
Feigel'man, Mikhail V.
V. Andreev, Anton
SCIPOST PHYSICS, 2023, 14 (05):
[6] Creep of Driven Flux Lines in Type-II Superconductors
Luo, Meng-Bo
Hu, Xiao
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2010, 23 (06) : 1055 - 1057
[7] EFFECTS OF FLUX FLOW, FLUX PINNING, AND FLUX CREEP UPON THE RF SURFACE IMPEDANCE OF TYPE-II SUPERCONDUCTORS
CLEM, JR
COFFEY, MW
JOURNAL OF SUPERCONDUCTIVITY, 1992, 5 (04): : 313 - 318
[8] Probing the pinning landscape in type-II superconductors via Campbell penetration depth
Willa, R.
Geshkenbein, V. B.
Blatter, G.
PHYSICAL REVIEW B, 2016, 93 (06)
[9] On the Determination of Pinning Mechanisms and Regimes in Type-II Superconductors with Weak Thermal Fluctuations
Hosseinzadeh, Mohammad
Ghorbani, Shaban Reza
Arabi, Hadi
JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2020, 33 (04) : 971 - 980
[10] Similarities and differences between flux-creep states of superconductors with different current-voltage relations
Romanovskii, VR
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2004, 401 (1-4): : 296 - 300

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