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원자제어 저차원 전자계 연구단
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Local characterization of a heavy-fermion superconductor via sub-Kelvin magnetic force microscopy

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Title
Local characterization of a heavy-fermion superconductor via sub-Kelvin magnetic force microscopy
Author(s)
Wulferding, Dirk; Geunyong Kim; Hoon Kim; Ilkyu Yang; Bauer, E. D.; Ronning, F.; Movshovich, R.; Kim, Jeehoon
Publication Date
2020-12
Journal
Applied Physics Letters, v.117, no.25, pp.1 - 5
Publisher
American Institute of Physics
Abstract
Using magnetic force microscopy operating at sub-Kelvin temperatures, we characterize the heavy fermion superconductor CeCoIn5. We pinpoint the absolute London penetration depth of lambda ( 0 ) = 435 +/- 20 nm and report its temperature dependence, which is closely linked to the symmetry of the superconducting gap. In addition, we directly measure the pinning force of individual Abrikosov vortices and estimate the critical current density of j c = 9 x 10 4A/cm(2). In contrast to the related, well-established tunnel diode oscillator technique, our method is capable of resolving inhomogeneities locally on the micrometer scale at ultra-low temperature.
URI
https://pr.ibs.re.kr/handle/8788114/9103
DOI
10.1063/5.0028517
ISSN
0003-6951
Appears in Collections:
Center for Artificial Low Dimensional Electronic Systems(원자제어 저차원 전자계 연구단) > 1. Journal Papers (저널논문)
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