Spectroscopic evidence of mixed angular momentum symmetry in non-centrosymmetric Ru$$_7$$B$$_3

Abstract Superconducting crystals with a lack of inversion symmetry can potentially host unconventional pairing. However, till today, no direct conclusive experimental evidence of such unconventional order parameters in non-centrosymmetric superconductors has been reported. In this paper, through di...

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Published inScientific reports Vol. 11; no. 1
Main Authors Datta, Soumya, Vasdev, Aastha, Ramachandran, Ranjani, Halder, Soumyadip, Motla, Kapil, Kataria, Anshu, Arushi, Roy Chowdhury, Rajeswari, Singh, Ravi Prakash, Sheet, Goutam
Format Journal Article
LanguageEnglish
Published 01.12.2021
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Summary:Abstract Superconducting crystals with a lack of inversion symmetry can potentially host unconventional pairing. However, till today, no direct conclusive experimental evidence of such unconventional order parameters in non-centrosymmetric superconductors has been reported. In this paper, through direct measurement of the superconducting energy gap by scanning tunnelling spectroscopy, we report the existence of both s -wave (singlet) and p -wave (triplet) pairing symmetries in non-centrosymmetric Ru $$_7$$ 7 B $$_3$$ 3 . Our temperature and magnetic field-dependent studies also indicate that the relative amplitudes of the singlet and triplet components change differently with temperature.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-021-99878-6