Ground state and polarization of a hydrogenlike atom near a Weyl semimetal

dc.contributor.authorCastano-Yepes, Jorge David
dc.contributor.authorNader, D. J.
dc.contributor.authorMartin-Ruiz, A.
dc.date.accessioned2025-01-20T20:10:31Z
dc.date.available2025-01-20T20:10:31Z
dc.date.issued2023
dc.description.abstractIn this paper we study the effects of a topological Weyl semimetal (WSM) upon the ground state and polarization of a hydrogen-like atom near its surface. The WSM is assumed to be in the equilibrium state and at the neutrality point, such that the interaction between the atomic charges and the material is fully described (in the nonretarded regime) by axion electrodynamics, which is an experimentally observable signature of the anomalous Hall effect in the bulk of the WSM. The atom-WSM interaction provides additional contributions to the Casimir-Polder potential thus modifying the energy spectra and wave function, which now becomes distance dependent. Using variational methods, we solve the corresponding Schrodinger equation for the atomic electron. The ground state and the polarization are analyzed as a function of the atom-surface distance, and we directly observe the effects of the nontrivial topology of the material by comparing our results with that of a topologically trivial sample. We also study the impact of the medium's permittivity by assuming a hydrogen atom in vacuum, and a donor impurity in the semiconductors gallium arsenide (GaAs) and gallium phosphide (GaP). We find that the topological interaction behaves as an effective-attractive charge so that the electronic cloud tends to be polarized to the interface of materials. Moreover, the loss of wave-function normalization is interpreted as a critical location from below which the bound state is broken.
dc.fuente.origenWOS
dc.identifier.doi10.1103/PhysRevA.107.032814
dc.identifier.eissn2469-9934
dc.identifier.issn2469-9926
dc.identifier.urihttps://doi.org/10.1103/PhysRevA.107.032814
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92075
dc.identifier.wosidWOS:000992669600001
dc.issue.numero3
dc.language.isoen
dc.revistaPhysical review a
dc.rightsacceso restringido
dc.titleGround state and polarization of a hydrogenlike atom near a Weyl semimetal
dc.typeartículo
dc.volumen107
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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