Gutenberg Open Science: Dynamics of collective modes in an unconventional charge density wave system BaNi2As2

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-8164

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DC Field	Value	Language
dc.contributor.author	Pokharel, Amrit Raj	-
dc.contributor.author	Grigorev, Vladimir	-
dc.contributor.author	Mejas, Arjan	-
dc.contributor.author	Dong, Tao	-
dc.contributor.author	Haghighirad, Amir A.	-
dc.contributor.author	Heid, Rolf	-
dc.contributor.author	Yao, Yi	-
dc.contributor.author	Merz, Michael	-
dc.contributor.author	Le Tacon, Matthieu	-
dc.contributor.author	Demsar, Jure	-
dc.date.accessioned	2022-10-31T08:54:00Z	-
dc.date.available	2022-10-31T08:54:00Z	-
dc.date.issued	2022	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/8179	-
dc.description.abstract	BaNi2As2 is a non-magnetic analogue of BaFe2As2, the parent compound of a prototype pnictide high-temperature superconductor, displaying superconductivity already at ambient pressure. Recent diffraction studies demonstrated the existence of two types of periodic lattice distortions above and below the triclinic phase transition, suggesting the existence of an unconventional charge-density-wave (CDW) order. The suppression of CDW order upon doping results in a sixfold increase in the superconducting transition temperature and enhanced nematic fluctuations, suggesting CDW is competing with superconductivity. Here, we apply time-resolved optical spectroscopy to investigate collective dynamics in BaNi2As2. We demonstrate the existence of several CDW amplitude modes. Their smooth evolution through the structural phase transition implies the commensurate CDW order in the triclinic phase evolves from the high-temperature unidirectional incommensurate CDW, and may indeed trigger the structural phase transition. Excitation density dependence reveals exceptional resilience of CDW against perturbation, implying an unconventional origin of the underlying electronic instability.	en_GB
dc.description.sponsorship	Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 491381577	de
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject.ddc	530 Physik	de_DE
dc.subject.ddc	530 Physics	en_GB
dc.title	Dynamics of collective modes in an unconventional charge density wave system BaNi2As2	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-8164	-
jgu.type.contenttype	Scientific article	de
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 08 Physik, Mathematik u. Informatik	de
jgu.organisation.number	7940	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Communications Physics	de
jgu.journal.volume	5	de
jgu.pages.alternative	141	de
jgu.publisher.year	2022	-
jgu.publisher.name	Springer Nature	de
jgu.publisher.place	London	de
jgu.publisher.issn	2399-3650	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	530	de
jgu.publisher.doi	10.1038/s42005-022-00919-x	de
jgu.organisation.ror	https://ror.org/023b0x485	-
jgu.subject.dfg	Naturwissenschaften	de
Appears in collections:	DFG-491381577-G

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