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...

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Autor principal:	Christophe De Beule, Solofo Groenendijk, Tobias Meng, Thomas L. Schmidt
Formato:	article
Lenguaje:	EN
Publicado:	SciPost 2021
Materias:	Physics QC1-999
Acceso en línea:	https://doaj.org/article/e850c235f32a438587d91094c21f608a
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spelling	oai:doaj.org-article:e850c235f32a438587d91094c21f608a2021-11-23T17:37:41ZArtificial event horizons in Weyl semimetal heterostructures and their non-equilibrium signatures2542-465310.21468/SciPostPhys.11.5.095https://doaj.org/article/e850c235f32a438587d91094c21f608a2021-11-01T00:00:00Zhttps://scipost.org/SciPostPhys.11.5.095https://doaj.org/toc/2542-4653We 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.Christophe De Beule, Solofo Groenendijk, Tobias Meng, Thomas L. SchmidtSciPostarticlePhysicsQC1-999ENSciPost Physics, Vol 11, Iss 5, p 095 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Physics QC1-999
spellingShingle	Physics QC1-999 Christophe De Beule, Solofo Groenendijk, Tobias Meng, Thomas L. Schmidt Artificial event horizons in Weyl semimetal heterostructures and their non-equilibrium signatures
description	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.
format	article
author	Christophe De Beule, Solofo Groenendijk, Tobias Meng, Thomas L. Schmidt
author_facet	Christophe De Beule, Solofo Groenendijk, Tobias Meng, Thomas L. Schmidt
author_sort	Christophe De Beule, Solofo Groenendijk, Tobias Meng, Thomas L. Schmidt
title	Artificial event horizons in Weyl semimetal heterostructures and their non-equilibrium signatures
title_short	Artificial event horizons in Weyl semimetal heterostructures and their non-equilibrium signatures
title_full	Artificial event horizons in Weyl semimetal heterostructures and their non-equilibrium signatures
title_fullStr	Artificial event horizons in Weyl semimetal heterostructures and their non-equilibrium signatures
title_full_unstemmed	Artificial event horizons in Weyl semimetal heterostructures and their non-equilibrium signatures
title_sort	artificial event horizons in weyl semimetal heterostructures and their non-equilibrium signatures
publisher	SciPost
publishDate	2021
url	https://doaj.org/article/e850c235f32a438587d91094c21f608a
work_keys_str_mv	AT christophedebeulesolofogroenendijktobiasmengthomaslschmidt artificialeventhorizonsinweylsemimetalheterostructuresandtheirnonequilibriumsignatures
_version_	1718416246672719872

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

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