Tip-induced superconductivity coexisting with preserved topological properties in line-nodal semimetal ZrSiS

Aggarwal, Leena ; Singh, Chandan K ; Aslam, Mohammad ; Singha, Ratnadwip ; Pariari, Arnab ; Gayen, Sirshendu ; Kabir, Mukul ; Mandal, Prabhat ; Sheet, Goutam (2019) Tip-induced superconductivity coexisting with preserved topological properties in line-nodal semimetal ZrSiS Journal of Physics: Condensed Matter, 31 (48). p. 485707. ISSN 0953-8984

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Official URL: http://doi.org/10.1088/1361-648X/ab3b61

Related URL: http://dx.doi.org/10.1088/1361-648X/ab3b61

Abstract

ZrSiS was recently shown to be a new material with topologically non-trivial band structure that exhibits multiple Dirac nodes and a robust linear band dispersion up to an unusually high energy of 2 eV. Such a robust linear dispersion makes the topological properties of ZrSiS insensitive to perturbations like carrier doping or lattice distortion. Here, we show that a novel superconducting phase with a remarkably high of 7.5 K can be induced in single crystals of ZrSiS by a non-superconducting metallic tip of Ag. From first-principles calculations, we show that the observed superconducting phase might originate from a dramatic enhancement of density of states due to the presence of a metallic tip on ZrSiS. Our calculations also show that the emerging tip-induced superconducting phase co-exists with the well preserved topological properties of ZrSiS.

Item Type:Article
Source:Copyright of this article belongs to Institute of Physics Publishing.
ID Code:122685
Deposited On:06 Aug 2021 10:37
Last Modified:06 Aug 2021 10:37

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