ISIS Neutron and Muon Source Data Journal

Examining the topological nature of superconductivity in PdTe2

Abstract: PdTe2 was found to be superconducting below Tc = 1.7 K and a Type-II Dirac semimetal. A protected bulk Dirac point arises from a band inversion that occurs within the Te p-orbital manifold, and is induced by a naturally disparate out-of-plane dispersion of pz and px/y-derived bands along kz direction. Spin-ARPES measurements reveal that the surface states are strongly spin polarized (>70%). STM and heat capacity studies give no indication of nodes in the superconducting order parameter or of in-gap states. The helical spin polarization of the surface states and the apparent s-wave superconductivity suggested from thermodynamic measurements present a dichotomy and raises a promising prospect to whether superconductivity has also a topological nature. With the aid of muSR, we will look for the proposed exotic superconductivity and possible time-reversal symmetry breaking in the sample.

Principal Investigator: Professor KwangYong Choi
Experimenter: Dr Sungwon Yoon
Experimenter: Mr ChanHyeon Lee
Local Contact: Dr Pabitra Biswas
Experimenter: Professor Yogesh Singh
Experimenter: Dr Suheon Lee

DOI: 10.5286/ISIS.E.RB1820260

ISIS Experiment Number: RB1820260

Publisher: STFC ISIS Neutron and Muon Source

Data format: RAW/Nexus
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Data Citation

The recommended format for citing this dataset in a research publication is as:
[author], [date], [title], [publisher], [doi]

For Example:
Professor KwangYong Choi et al; (2018): Examining the topological nature of superconductivity in PdTe2, STFC ISIS Neutron and Muon Source, https://doi.org/10.5286/ISIS.E.RB1820260

Data is released under the CC-BY-4.0 license.