Anisotropy in Electronic and Magneto-Transport of 2D Superconductor NbSe2

N. K. Karn*, M. M. Sharma, I. Felner, V. P.S. Awana

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

This article reports the successful synthesis of single crystalline two-dimensional thin flakes of NbSe2. The XRD (X-ray diffraction) pattern of the grown crystal ensured its crystallization in a single phase with a hexagonal structure. The EDAX (energy dispersive X-ray analysis) endorsed the stoichiometry of the as-grown sample. To study the vibrational modes, the Raman spectra were recorded, which exhibited the expected four Raman active modes. The resistance vs temperature measurement showed a well-established superconducting transition (Tc) at 7.3 K. The ZFC (zero-field cooled) and FC (field cooled) magnetization curves, as well as the isothermal M−H (magnetization vs field) measurements, have been performed for both in-plane and out-of-plane H directions. Distinct anisotropy is observed in both magnetization and magneto-transport measurements with field direction, leading to different critical fields (Hc). Out-of-plane magneto-transport data hints towards the existence of a filamentary state. The density functional theory (DFT) has been used to study the band structure of NbSe2. Although the bulk band structure confirmed metallic behavior, the same of mono-layers of NbSe2 within the GGA+U framework showed a band gap of 1.17 eV. The article addresses the anisotropy in the electronic and magneto-transport of 2D superconductor NbSe2.

Original languageEnglish
Pages (from-to)1381-1391
Number of pages11
JournalJournal of Superconductivity and Novel Magnetism
Volume37
Issue number8-10
DOIs
StatePublished - Oct 2024

Bibliographical note

Publisher Copyright:
© The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature 2024.

Keywords

  • 2D superconductor
  • Anisotropy
  • Crystal growth
  • Density functional theory
  • Magneto-transport

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