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http://dx.doi.org/10.25673/108804
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DC Element | Wert | Sprache |
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dc.contributor.author | Gillmeister, Konrad | - |
dc.contributor.author | Golež, Denis | - |
dc.contributor.author | Chiang, Cheng-Tien | - |
dc.contributor.author | Bittner, Nikolaj | - |
dc.contributor.author | Pavlyukh, Yaroslav | - |
dc.contributor.author | Berakdar, Jamal | - |
dc.contributor.author | Werner, Philipp | - |
dc.contributor.author | Widdra, Wolf | - |
dc.date.accessioned | 2023-07-04T11:37:54Z | - |
dc.date.available | 2023-07-04T11:37:54Z | - |
dc.date.issued | 2020 | - |
dc.identifier.uri | https://opendata.uni-halle.de//handle/1981185920/110759 | - |
dc.identifier.uri | http://dx.doi.org/10.25673/108804 | - |
dc.description.abstract | Charge excitations across an electronic band gap play an important role in opto-electronics and light harvesting. In contrast to conventional semiconductors, studies of above-band-gap photoexcitations in strongly correlated materials are still in their infancy. Here we reveal the ultrafast dynamics controlled by Hund’s physics in strongly correlated photoexcited NiO. By combining time-resolved two-photon photoemission experiments with state-of-the-art numerical calculations, an ultrafast (≲10 fs) relaxation due to Hund excitations and related photo-induced in-gap states are identified. Remarkably, the weight of these in-gap states displays long-lived coherent THz oscillations up to 2 ps at low temperature. The frequency of these oscillations corresponds to the strength of the antiferromagnetic superexchange interaction in NiO and their lifetime vanishes slightly above the Néel temperature. Numerical simulations of a two-band t-J model reveal that the THz oscillations originate from the interplay between local many-body excitations and antiferromagnetic spin correlations. | eng |
dc.language.iso | eng | - |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | - |
dc.subject.ddc | 530 | - |
dc.title | Ultrafast coupled charge and spin dynamics in strongly correlated NiO | eng |
dc.type | Article | - |
local.versionType | publishedVersion | - |
local.bibliographicCitation.journaltitle | Nature Communications | - |
local.bibliographicCitation.volume | 11 | - |
local.bibliographicCitation.issue | 4095 | - |
local.bibliographicCitation.publishername | Nature Publishing Group UK | - |
local.bibliographicCitation.publisherplace | [London] | - |
local.bibliographicCitation.doi | 10.1038/s41467-020-17925-8 | - |
local.subject.keywords | Magnetic properties and materials, Surfaces, interfaces and thin films | - |
local.openaccess | true | - |
dc.identifier.ppn | 1733741658 | - |
local.bibliographicCitation.year | 2020 | - |
cbs.sru.importDate | 2023-07-04T11:37:15Z | - |
local.bibliographicCitation | Enthalten in Nature Communications - [London] : Nature Publishing Group UK, 2010 | - |
local.accessrights.dnb | free | - |
Enthalten in den Sammlungen: | Open Access Publikationen der MLU |
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Datei | Beschreibung | Größe | Format | |
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s41467-020-17925-8.pdf | 1.82 MB | Adobe PDF | ![]() Öffnen/Anzeigen |