Artificial event horizons in Weyl semimetal heterostructures and their non-equilibrium signatures
We investigate transport in type-I/type-II Weyl semimetal 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...
Guardado en:
| Autor principal: | |
|---|---|
| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
SciPost
2021
|
| Materias: | |
| Acceso en línea: | https://doaj.org/article/e850c235f32a438587d91094c21f608a |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| Sumario: | We investigate transport in type-I/type-II Weyl semimetal 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 analogue 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. |
|---|