Proposal for detecting nodal-line semimetal surface-states with resonant spin-flipped reflection

Abstract

Topological nodal-line semimetals are predicted to exhibit unique drumhead-like surface states (DSS). Yet, a direct detection of such states remains a challenge. Here, we propose spin-resolved transport in a junction between a normal metal and a spin-orbit coupled nodal-line semimetal as the mechanism for their detection. Specifically, we find that in such a device, the DSS induce resonant spin-flipped reflection. This effect can be probed by both vertical spin transport and lateral charge transport between anti-parallel magnetic terminals. In the tunneling limit of the junction, both spin and charge conductances exhibit a resonant peak around zero energy, providing a unique evidence of the DSS. This signature is robust to both dispersive DSS and interface disorder. Based on numerical calculations, we show that the scheme can be implemented in the topological semimetal HgCr${}_2$Se${}_4$.

13 pages, 3 figures, including supplemental material, the version to be published in PRL

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• Quantum Transport in Topological Semimetals under Magnetic Fields (II)
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• Enhanced higher harmonic generation from nodal topology
• Signature of odd-frequency equal-spin triplet pairing in the Josephson current on the surface of Weyl nodal loop semimetals
• Hyperbolic Nodal Band Structures and Knot Invariants
• Double Andreev reflections and double normal reflections in nodal-line semimetal-superconductor junctions
• Large Josephson current in Weyl nodal loop semimetals due to odd-frequency superconductivity
• Andreev Reflection in Fermi Arc Surface States of Weyl Semimetals
• Engineering second-order nodal-line semimetals by breaking $\mathcal{P}\mathcal{T}$ symmetry and periodic driving
• Detection of Fermi Arcs in Weyl Semimetals through Surface Negative Refraction
• Gate-tunable Lifshitz transition of Fermi arcs and its nonlocal transport signatures
• Spin and charge transport in topological nodal-line semimetals
• Dispersive Drumhead States in Nodal-Line Semimetal Junctions
• Impurity-induced resonant states in topological nodal-line semimetals
• Electronic Origin of Half-metal to Semiconductor Transition and Colossal Magnetoresistance in Spinel HgCr2Se4
• Topological semimetal with coexisting nodal points and nodal lines
• Conductance oscillation in surface junctions of Weyl semimetals
• Interfaces of nodal-line semimetals: drum states, transport and refraction
• Sign reversal of magnetoresistivity in massive nodal-line semimetals due to Lifshitz transition of Fermi surface
• Quasi-nodal lines in rhombohedral magnetic materials