Evidence of multi-band superconductivity in non-centrosymmetric full Heusler alloy LuPd2Sn. (12th July 2023)

• Record Type: Journal Article
• Authors: Yadav, Kavita; Mukherjee, K
• Is Part Of: Journal of physics. Volume 35:Number 27(2023)
• Publication Date: 2023-07-12
• Subjects: unconventional superconductivity -- pairing symmetry -- antisymmetric spin orbit coupling; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/acc919
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: In this work, evidence of multi-band superconductivity and presence of mixed parity states in full Heusler alloy LuPd2 Sn is investigated using the x-ray diffraction, temperature and field dependent resistivity, temperature dependent magnetization, and heat capacity measurements. Our studies reveal that LuPd2 Sn is a type II superconductor and undergoes superconducting transition below 2.5 K. Above 2.5 K, the temperature and field dependence of resistivity indicate to the presence of multiple bands and inter-band phonon assisted scattering. The upper critical field, H C2 ( T ) exhibits linear behaviour and deviates from Werthamer, Helfand and Hohenberg model over the measured temperature range. Additionally, the Kadowaki–Woods ratio plot supports the unconventional superconductivity in this alloy. Moreover, a significant deviation from the s-wave behaviour is noted, which is studied using phases fluctuation analysis. It indicates the presence of spin triplet along with spin singlet component arising due to antisymmetric spin orbit coupling.