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Ultrafast dynamics and coherent order parameter oscillations under photo-excitation in the excitonic insulator Ta2NiSe5

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dc.contributor.authorWerdehausen, Daniel
dc.contributor.authorAgustsson, Steinn Y.
dc.contributor.authorKim, Minjae
dc.contributor.authorShabestari, Parmida
dc.contributor.authorHuang, Emily
dc.contributor.authorPokharel, Amrit
dc.contributor.authorLarkin, Timofei
dc.contributor.authorBoris, Alexander
dc.contributor.authorTakayama, Tomohiro
dc.contributor.authorLu, Yangfan
dc.contributor.authorRost, Andreas W.
dc.contributor.authorChu, Hao
dc.contributor.authorYaresko, Alexander
dc.contributor.authorHöppner, Marc
dc.contributor.authorSchulz, Armin
dc.contributor.authorManske, Dirk
dc.contributor.authorKeimer, Bernhard
dc.contributor.authorTakagi, Hidenori
dc.contributor.authorKaiser, Stefan
dc.contributor.editorRafailov, Michael K.
dc.date.accessioned2019-11-21T10:30:01Z
dc.date.available2019-11-21T10:30:01Z
dc.date.issued2018-05-08
dc.identifier263441839
dc.identifier0f4ebb36-e14e-4b13-a6b3-68ce75c1ee52
dc.identifier85049905081
dc.identifier.citationWerdehausen , D , Agustsson , S Y , Kim , M , Shabestari , P , Huang , E , Pokharel , A , Larkin , T , Boris , A , Takayama , T , Lu , Y , Rost , A W , Chu , H , Yaresko , A , Höppner , M , Schulz , A , Manske , D , Keimer , B , Takagi , H & Kaiser , S 2018 , Ultrafast dynamics and coherent order parameter oscillations under photo-excitation in the excitonic insulator Ta 2 NiSe 5 . in M K Rafailov (ed.) , Ultrafast Bandgap Photonics III . , 1063803 , Proceedings of SPIE , vol. 10638 , SPIE , pp. 1-7 , Ultrafast Bandgap Photonics III 2018 , Orlando , Florida , United States , 16/04/18 . https://doi.org/10.1117/12.2304795en
dc.identifier.citationconferenceen
dc.identifier.isbn9781510617872
dc.identifier.isbn9781510617889
dc.identifier.issn0277-786X
dc.identifier.urihttps://hdl.handle.net/10023/18974
dc.description.abstractThe excitonic insulator (EI) is an intriguing phase of condensed excitons undergoing a Bose-Einstein-Condensation (BEC)-type transition. A prominent candidate has been identified in Ta2NiSe5. Ultrafast spectroscopy allows tracing the coherent response of the EI condensate directly in the time domain. Probing the collective electronic response we can identify fingerprints for the Higgs-amplitude equivalent mode of the condensate. In addition we find a peculiar coupling of the EI phase to a low frequency phonon mode. We will discuss the transient response on multiple energies scales ranging from the exciton dynamics to the coherent THz response of the gap.
dc.format.extent7
dc.format.extent815083
dc.language.isoeng
dc.publisherSPIE
dc.relation.ispartofUltrafast Bandgap Photonics IIIen
dc.relation.ispartofseriesProceedings of SPIEen
dc.subjectCollective excitationen
dc.subjectExciton wave packeten
dc.subjectExcitonic insulatoren
dc.subjectNon-equilibriumen
dc.subjectPump-probeen
dc.subjectTHzen
dc.subjectTime-domainen
dc.subjectUltrafasten
dc.subjectQA75 Electronic computers. Computer scienceen
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.subjectComputer Science Applicationsen
dc.subjectElectrical and Electronic Engineeringen
dc.subjectElectronic, Optical and Magnetic Materialsen
dc.subjectApplied Mathematicsen
dc.subjectCondensed Matter Physicsen
dc.subjectT-NDASen
dc.subject.lccQA75en
dc.subject.lccQCen
dc.subject.lccTKen
dc.titleUltrafast dynamics and coherent order parameter oscillations under photo-excitation in the excitonic insulator Ta2NiSe5en
dc.typeConference itemen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.1117/12.2304795


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