Artificial event horizons in Weyl semimetal heterostructures and their non-equilibrium signatures

Abstract

We investigate transport in type-I/type-II Weyl semi\-metal heterostructures that realize effective black- or white-hole event horizons. We provide an exact solution to the scattering problem at normal incidence and low energies, both for a sharp and a slowly-varying Weyl cone tilt profile. In the latter case, we find two channels with transmission amplitudes analog to those of Hawking radiation. Whereas the Hawking-like signatures of these two channels cancel in equilibrium, we demonstrate that one can favor the contribution of either channel using a non-equilibrium state, either by irradiating the type-II region or by coupling it to a magnetic lead. This in turn gives rise to a peak in the two-terminal differential conductance which can serve as an experimental indicator of the artificial event horizon.

28 pages, 7 figures; published version

References in corpus (8)

• Photocurrents in Weyl semimetals
• A Primer for Black Hole Quantum Physics
• Electron scattering in tantalum monoarsenide
• Black hole and Hawking radiation by type-II Weyl fermions
• Magnetic textures and dynamics in magnetic Weyl semimetals
• The $8Pmmn$ borophene sheet: A solid-state platform for space-time engineering
• Hawking fragmentation and Hawking attenuation in Weyl semimetals
• Synthetic gravitational horizons in low-dimensional quantum matter

Cited by in corpus (16)

• Supermoiré low-energy effective theory of twisted trilayer graphene
• Hawking fragmentation and Hawking attenuation in Weyl semimetals
• Type-II Weyl semimetal vs gravastar
• Thermalization by a synthetic horizon
• Colloquium: Synthetic quantum matter in non-standard geometries
• Horizon physics of quasi-one-dimensional tilted Weyl cones on a lattice
• Black hole mirages: electron lensing and Berry curvature effects in inhomogeneously tilted Weyl semimetals
• Anisotropic optics and gravitational lensing of tilted Weyl fermions
• Geodesic geometry of 2+1-D Dirac materials subject to artificial, quenched gravitational singularities
• Towards the theory of types III and IV non-Hermitian Weyl fermions
• Analogue Hawking radiation as a tunneling in a two-level $\mathcal{P}\mathcal{T}$-symmetric system
• Tilted Dirac superconductor at quantum criticality: Restoration of Lorentz symmetry
• Optimally scrambling chiral spin-chain with effective black hole geometry
• Yukawa-Lorentz Symmetry of Tilted Non-Hermitian Dirac Semimetals at Quantum Criticality
• Artificial Hawking radiation, weak pseudo-Hermiticity and Weyl semimetal blackhole analogy
• Quantum dynamics in 1D lattice models with synthetic horizons