Observation of paramagnetic Meissner currents-evidence for Andreev bound surface states

W. Prusseit; H. Walter; R. Semerad; H. Kinder; W. Assmann; H. Huber; B. Kabius; H. Burkhardt; D. Rainer; J. A. Sauls

doi:10.1016/S0921-4534(99)00086-6

Observation of paramagnetic Meissner currents-evidence for Andreev bound surface states

W. Prusseit
, H. Walter
, R. Semerad
, H. Kinder
, W. Assmann
, H. Huber
, B. Kabius
, H. Burkhardt
, D. Rainer
, J. A. Sauls

Materials Research Institute (MRI)

Research output: Contribution to journal › Conference article › peer-review

6 Scopus citations

Abstract

We report the observation of anomalous Meissner currents (AMCs) in thin films of superconducting YBCO with oriented internal surfaces introduced by heavy-ion bombardment. High-precision measurements of the penetration depth λ(T) reveal an upturn in the temperature dependence of λ(T) below T ≈ 15 K, which is strongly dependent on the orientation and density of the surfaces. The magnitude of the observed effect, its onset temperature and its dependence on the orientation of the surfaces are in quantitative agreement with the theory of surface effects in d-wave superconductors. The anomaly is interpreted as a consequence of surface-induced Andreev bound states (ABSs) carrying paramagnetic currents.

Original language	English (US)
Pages (from-to)	396-402
Number of pages	7
Journal	Physica C: Superconductivity and its Applications
Volume	317-318
DOIs	https://doi.org/10.1016/S0921-4534(99)00086-6
State	Published - May 1999
Event	Proceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors - Crete, Greece Duration: Sep 26 1998 → Oct 3 1998

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/S0921-4534(99)00086-6

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title = "Observation of paramagnetic Meissner currents-evidence for Andreev bound surface states",

abstract = "We report the observation of anomalous Meissner currents (AMCs) in thin films of superconducting YBCO with oriented internal surfaces introduced by heavy-ion bombardment. High-precision measurements of the penetration depth λ(T) reveal an upturn in the temperature dependence of λ(T) below T ≈ 15 K, which is strongly dependent on the orientation and density of the surfaces. The magnitude of the observed effect, its onset temperature and its dependence on the orientation of the surfaces are in quantitative agreement with the theory of surface effects in d-wave superconductors. The anomaly is interpreted as a consequence of surface-induced Andreev bound states (ABSs) carrying paramagnetic currents.",

author = "W. Prusseit and H. Walter and R. Semerad and H. Kinder and W. Assmann and H. Huber and B. Kabius and H. Burkhardt and D. Rainer and Sauls, \{J. A.\}",

note = "Funding Information: The work of JAS was supported in part by the STC for Superconductivity through NSF Grant no. 91-20000. D.R. and J.A.S. also acknowledge support from the Max-Planck-Gesellschaft and the Alexander von Humboldt-Stiftung.; Proceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors ; Conference date: 26-09-1998 Through 03-10-1998",

year = "1999",

month = may,

doi = "10.1016/S0921-4534(99)00086-6",

language = "English (US)",

volume = "317-318",

pages = "396--402",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Observation of paramagnetic Meissner currents-evidence for Andreev bound surface states

AU - Prusseit, W.

AU - Walter, H.

AU - Semerad, R.

AU - Kinder, H.

AU - Assmann, W.

AU - Huber, H.

AU - Kabius, B.

AU - Burkhardt, H.

AU - Rainer, D.

AU - Sauls, J. A.

N1 - Funding Information: The work of JAS was supported in part by the STC for Superconductivity through NSF Grant no. 91-20000. D.R. and J.A.S. also acknowledge support from the Max-Planck-Gesellschaft and the Alexander von Humboldt-Stiftung.

PY - 1999/5

Y1 - 1999/5

N2 - We report the observation of anomalous Meissner currents (AMCs) in thin films of superconducting YBCO with oriented internal surfaces introduced by heavy-ion bombardment. High-precision measurements of the penetration depth λ(T) reveal an upturn in the temperature dependence of λ(T) below T ≈ 15 K, which is strongly dependent on the orientation and density of the surfaces. The magnitude of the observed effect, its onset temperature and its dependence on the orientation of the surfaces are in quantitative agreement with the theory of surface effects in d-wave superconductors. The anomaly is interpreted as a consequence of surface-induced Andreev bound states (ABSs) carrying paramagnetic currents.

AB - We report the observation of anomalous Meissner currents (AMCs) in thin films of superconducting YBCO with oriented internal surfaces introduced by heavy-ion bombardment. High-precision measurements of the penetration depth λ(T) reveal an upturn in the temperature dependence of λ(T) below T ≈ 15 K, which is strongly dependent on the orientation and density of the surfaces. The magnitude of the observed effect, its onset temperature and its dependence on the orientation of the surfaces are in quantitative agreement with the theory of surface effects in d-wave superconductors. The anomaly is interpreted as a consequence of surface-induced Andreev bound states (ABSs) carrying paramagnetic currents.

UR - https://www.scopus.com/pages/publications/17144465178

UR - https://www.scopus.com/pages/publications/17144465178#tab=citedBy

U2 - 10.1016/S0921-4534(99)00086-6

DO - 10.1016/S0921-4534(99)00086-6

M3 - Conference article

AN - SCOPUS:17144465178

SN - 0921-4534

VL - 317-318

SP - 396

EP - 402

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

T2 - Proceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors

Y2 - 26 September 1998 through 3 October 1998

ER -

Observation of paramagnetic Meissner currents-evidence for Andreev bound surface states

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