Coexistence of Chiral Majorana Edge States and Bogoliubov Fermi Surfaces in Two-Dimensional Nonsymmorphic Dirac Semimetal/Superconductor Heterostructures

Abstract

Dirac semimetals are renowned for the host of singular symmetry-protected band degeneracies which can give rise to other exotic phases. In this work, we consider a two-dimensional Dirac semimetal stabilized by PT symmetry and nonsymmorphic symmetries. We find that an out-of-plane Zeeman field can lift the Dirac points and transform the system into a Chern insulator with chiral edge states. By placing the nonsymmorphic Dirac semimetal in proximity to an s-wave superconductor, we uncover that chiral topological superconductors with large Chern numbers can be achieved. In addition, we find that topologically-protected Bogoliubov Fermi surface can also emerge in this system, due to the coexistence of inversion symmetry and particle-hole symmetry. Notably, we find that the chiral Majorana edge state persists even when the Chern number becomes ill-defined due to the appearance of Bogoliubov Fermi surfaces. The impact of these Bogoliubov Fermi surfaces on the thermal Hall effects is also investigated. Our study not only identifies a class of materials capable of realizing topological Bogoliubov Fermi surfaces through conventional s-wave superconductivity, but also uncovers an exotic phase where chiral Majorana edge states and Bogoliubov Fermi surfaces coexist.

7+4 pages, 5 figures

References in corpus (39)

• Non-Abelian Anyons and Topological Quantum Computation
• Superconducting proximity effect and Majorana fermions at the surface of a topological insulator
• Classification of topological insulators and superconductors in three spatial dimensions
• Quantized Anomalous Hall Effect in Magnetic Topological Insulators
• Colloquium: Majorana Fermions in nuclear, particle and solid-state physics
• Introduction to topological superconductivity and Majorana fermions
• Non-Abelian Topological Order in S-Wave Superfluids of Ultracold Fermionic Atoms
• $p_x+i{p}_y$ superfluid from s-wave interactions of fermionic cold atoms
• Topological superconductivity in a van der Waals heterostructure
• Half-integer quantized anomalous thermal Hall effect in the Kitaev material $\alpha$-RuCl${}_3$
• Bogoliubov Fermi surfaces in superconductors with broken time-reversal symmetry
• Nonsymmorphic-symmetry-protected hourglass Dirac loop, nodal line, and Dirac point in bulk and monolayer $X_3$SiTe${}_6$ ($X=$ Ta, Nb)
• Majorana nanowires for topological quantum computation
• Two-Dimensional Dirac Fermions Protected by Space-Time Inversion Symmetry in Black Phosphorus
• Quantum Thermal Hall Effect in a Time-Reversal-Symmetry-Broken Topological Superconductor in Two Dimensions : Approach From Bulk Calculations
• Topological Order and Non-Abelian Statistics in Noncentrosymmetric s-Wave Superconductors
• Inflated nodes and surface states in superconducting half-Heusler compounds
• Two-dimensional Dirac Semimetals without Inversion Symmetry
• d-wave superconductivity and Bogoliubov-Fermi surfaces in Rarita-Schwinger-Weyl semimetals
• Exceeding the Landau superflow speed limit with topological Bogoliubov Fermi surfaces
• Bogoliubov-Fermi Surfaces in Noncentrosymmetric Multicomponent Superconductors
• Bogoliubov Fermi Surfaces in Spin-1/2 Systems: Model Hamiltonians and Experimental Consequences
• Superconductivity in spin-$3/2$ systems: symmetry classification, odd-frequency pairs, and Bogoliubov Fermi surfaces
• Berry curvature effects on quasiparticle dynamics in superconductors
• Detecting induced $p\pm ip$ pairing at the Al-InAs interface with a quantum microwave circuit
• Symmetry, nodal structure, and Bogoliubov Fermi surfaces for nonlocal pairing
• Instability of $j=3/2$ Bogoliubov Fermi-surfaces
• Topological Superconductivity from Unconventional Band Degeneracy with Conventional Pairing
• Bogoliubov-Fermi surface with inversion symmetry and electron-electron interactions: relativistic analogies and lattice theory
• Robust Dirac lines against Ge vacancy and possible spin-orbit Dirac points in nonsymmorphic HfGe0.92Te
• Bogoliubov Fermi surfaces from pairing of emergent $j=3/2$ fermions on the pyrochlore lattice
• Identifying Bogoliubov Fermi surfaces via thermoelectric response in a $d$-wave superconductor heterostructure
• Observation of in-gap states in a two-dimensional CrI2/NbSe2 heterostructure
• Surface density of states and tunneling spectroscopy of a spin-3/2 superconductor with Bogoliubov Fermi Surfaces
• Proximity-induced gapless superconductivity in two-dimensional Rashba semiconductor in magnetic field
• Nonlocal thermoelectricity in quantum wires as a signature of Bogoliubov-Fermi points
• Stability of Bogoliubov Fermi Surfaces within BCS Theory
• Microscopic origin of ultranodal superconducting states in spin-1/2 systems
• Impurity effect on Bogoliubov Fermi surfaces: Analysis based on iron-based superconductors

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