Dominant s -wave superconducting gap in PdTe2 observed by tunneling spectroscopy on side junctions

J. A. Voerman, J. C. De Boer, T. Hashimoto, Yingkai Huang, Chuan Li, A. Brinkman

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Abstract

We have fabricated superconductor-normal metal side junctions with different barrier transparencies out of PdTe2 crystalline flakes and measured the differential conductance spectra. Modeling our measurements using a modified Blonder, Tinkham, and Klapwijk (BTK) formalism confirms that the superconductivity is mostly comprised of the conventional s-wave symmetry. We have found that for junctions with very low barrier transparencies, the junctions can enter a thermal regime, where the critical current becomes important. Adding this to the BTK model allows us to accurately fit the experimental data, from which we conclude that the superconductivity in the a-b plane of PdTe2 is dominated by conventional s-wave pairing.

Original languageEnglish
Article number014510
JournalPhysical Review B
Volume99
Issue number1
DOIs
Publication statusPublished - 11 Jan 2019

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Superconductivity
Transparency
Spectroscopy
Critical currents
superconductivity
spectroscopy
Superconducting materials
Metals
flakes
Crystalline materials
critical current
formalism
symmetry
metals
Hot Temperature

Cite this

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abstract = "We have fabricated superconductor-normal metal side junctions with different barrier transparencies out of PdTe2 crystalline flakes and measured the differential conductance spectra. Modeling our measurements using a modified Blonder, Tinkham, and Klapwijk (BTK) formalism confirms that the superconductivity is mostly comprised of the conventional s-wave symmetry. We have found that for junctions with very low barrier transparencies, the junctions can enter a thermal regime, where the critical current becomes important. Adding this to the BTK model allows us to accurately fit the experimental data, from which we conclude that the superconductivity in the a-b plane of PdTe2 is dominated by conventional s-wave pairing.",
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Dominant s -wave superconducting gap in PdTe2 observed by tunneling spectroscopy on side junctions. / Voerman, J. A.; De Boer, J. C.; Hashimoto, T.; Huang, Yingkai; Li, Chuan; Brinkman, A.

In: Physical Review B, Vol. 99, No. 1, 014510, 11.01.2019.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Dominant s -wave superconducting gap in PdTe2 observed by tunneling spectroscopy on side junctions

AU - Voerman, J. A.

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AU - Hashimoto, T.

AU - Huang, Yingkai

AU - Li, Chuan

AU - Brinkman, A.

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AB - We have fabricated superconductor-normal metal side junctions with different barrier transparencies out of PdTe2 crystalline flakes and measured the differential conductance spectra. Modeling our measurements using a modified Blonder, Tinkham, and Klapwijk (BTK) formalism confirms that the superconductivity is mostly comprised of the conventional s-wave symmetry. We have found that for junctions with very low barrier transparencies, the junctions can enter a thermal regime, where the critical current becomes important. Adding this to the BTK model allows us to accurately fit the experimental data, from which we conclude that the superconductivity in the a-b plane of PdTe2 is dominated by conventional s-wave pairing.

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