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Real-Space Probing of the Local Magnetic Response of Thin-Film Superconductors Using Single Spin Magnetometry.

  • Rohner D Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland. dominik.rohner@unibas.ch.
  • Thiel L Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland. lucas.thiel@unibas.ch.
  • Müller B Physikalisches Institut and Center for Quantum Science (CQ) in LISA+, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany. benedikt.mueller@uni-tuebingen.de.
  • Kasperczyk M Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland. mark.kasperczyk@unibas.ch.
  • Kleiner R Physikalisches Institut and Center for Quantum Science (CQ) in LISA+, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany. reinhold.kleiner@uni-tuebingen.de.
  • Koelle D Physikalisches Institut and Center for Quantum Science (CQ) in LISA+, Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen, Germany. koelle@uni-tuebingen.de.
  • Maletinsky P Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland. patrick.maletinsky@unibas.ch.
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  • 2018-11-09
Published in:
  • Sensors (Basel, Switzerland). - 2018
london penetration depth
meissner effect
nitrogen-vacancy center
quantum sensing
scanning probe microscopy
English We report on direct, real-space imaging of the stray magnetic field above a micro-scale disc of a thin film of the high-temperature superconductor YBa₂Cu₃O7-δ (YBCO) using scanning single spin magnetometry. Our experiments yield a direct measurement of the sample's London penetration depth and allow for a quantitative reconstruction of the supercurrents flowing in the sample as a result of Meissner screening. These results show the potential of scanning single spin magnetometry for studies of the nanoscale magnetic properties of thin-film superconductors, which could be readily extended to elevated temperatures or magnetic fields.
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  • English
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gold
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https://sonar.ch/global/documents/270375
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