Three-dimensional time reversal invariant topological superconductivity in doped chiral topological semimetals

Abstract

Chiral topological semimetals host multifold degenerate band crossing points under the protection of crystalline symmetries. In this paper, we suggest that the recently discovered chiral topological semimetals in space group 198, parts of which are superconducting upon doping, can be new candidates of time reversal invariant topological superconductors. By investigating the Fermi surfaces around the band crossing points that carry nonzero Chern numbers, we clarify how the nontrivial topology of chiral topological semimetals affects their superconducting state and show the existence of topological superconductivity in $s_{\pm }$-wave pairing with surface Majorana fermions. We further demonstrate that the topological superconductivity is favored by the inter-unit-cell phonon-mediated electron-electron interaction.

published version, 5 pages+supplemental materials, 4 figures

References in corpus (20)

• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
• Majorana Fermions and a Topological Phase Transition in Semiconductor-Superconductor Heterostructures
• Classification of topological insulators and superconductors in three spatial dimensions
• Colloquium: Majorana Fermions in nuclear, particle and solid-state physics
• Introduction to topological superconductivity and Majorana fermions
• Scaling of Majorana Zero-Bias Conductance Peaks
• Multiple types of topological fermions in transition metal silicides
• Large Fermi Arcs in Unconventional Weyl Semimetal RhSi
• Discovery of topological chiral crystals with helicoid arc states
• New classes of chiral topological nodes with non-contractible surface Fermi arcs in CoSi
• Zero-energy vortex bound state in the superconducting topological surface state of Fe(Se,Te)
• Local Measurements of the Superconducting Pairing Symmetry in CuxBi2Se3
• Time-reversal invariant topological superconductivity in doped Weyl semimetals
• Quantized conductance of Majorana zero mode in the vortex of the topological superconductor (Li0.84Fe0.16)OHFeSe
• Observation of multiple types of topological fermions in PdBiSe
• Type-I superconductivity in noncentrosymmetric superconductor AuBe
• muSR and Magnetometry Study of the Type-I Superconductor BeAu
• Superconductivity in cubic noncentrosymmetric PdBiSe Crystal

Cited by in corpus (3)

• Topological multiband s-wave superconductivity in coupled multifold fermions
• Polar hairs of mixed-parity nodal superconductors in Rarita-Schwinger-Weyl metals
• Fermi surface and topology of multiband superconductor BeAu