cam.issuedOnline	2022-04-19
dc.contributor.author	Grbić, Mihael S
dc.contributor.author	O'Farrell, Eoin CT
dc.contributor.author	Matsumoto, Yosuke
dc.contributor.author	Kuga, Kentaro
dc.contributor.author	Brando, Manuel
dc.contributor.author	Küchler, Robert
dc.contributor.author	Nevidomskyy, Andriy H
dc.contributor.author	Yoshida, Makoto
dc.contributor.author	Sakakibara, Toshiro
dc.contributor.author	Kono, Yohei
dc.contributor.author	Shimura, Yasuyuki
dc.contributor.author	Sutherland, Michael L
dc.contributor.author	Takigawa, Masashi
dc.contributor.author	Nakatsuji, Satoru
dc.contributor.orcid	Grbić, Mihael S [0000-0002-2542-2192]
dc.contributor.orcid	Kuga, Kentaro [0000-0001-7434-279X]
dc.contributor.orcid	Nevidomskyy, Andriy H [0000-0002-8684-7979]
dc.contributor.orcid	Sutherland, Michael L [0000-0003-4345-9172]
dc.date.accessioned	2022-04-19T15:12:23Z
dc.date.available	2022-04-19T15:12:23Z
dc.date.issued	2022-04-19
dc.date.submitted	2019-09-08
dc.date.updated	2022-04-19T15:12:23Z
dc.description	Funder: U.S. National Science Foundation CAREER grant no. DMR-1350237
dc.description	Funder: RCUK \| Engineering and Physical Sciences Research Council (EPSRC); doi: https://doi.org/10.13039/501100000266
dc.description	Funder: Royal Society; doi: https://doi.org/10.13039/501100000288
dc.description	Funder: CIFAR as a Fellow of the CIFAR Quantum Materials Research Program
dc.description.abstract	Intermetallic compounds containing f-electron elements have been prototypical materials for investigating strong electron correlations and quantum criticality (QC). Their heavy fermion ground state evoked by the magnetic f-electrons is susceptible to the onset of quantum phases, such as magnetism or superconductivity, due to the enhanced effective mass (m) and a corresponding decrease of the Fermi temperature. However, the presence of f-electron valence fluctuations to a non-magnetic state is regarded an anathema to QC, as it usually generates a paramagnetic Fermi-liquid state with quasiparticles of moderate m. Such systems are typically isotropic, with a characteristic energy scale T0 of the order of hundreds of kelvins that require large magnetic fields or pressures to promote a valence or magnetic instability. Here we show the discovery of a quantum critical behaviour and a Lifshitz transition under low magnetic field in an intermediate valence compound α-YbAlB4. The QC origin is attributed to the anisotropic hybridization between the conduction and localized f-electrons. These findings suggest a new route to bypass the large valence energy scale in developing the QC.
dc.identifier.doi	10.17863/CAM.83634
dc.identifier.eissn	2041-1723
dc.identifier.issn	2041-1723
dc.identifier.other	s41467-022-29757-9
dc.identifier.other	29757
dc.identifier.uri	https://www.repository.cam.ac.uk/handle/1810/336214
dc.language	en
dc.publisher	Springer Science and Business Media LLC
dc.subject	Article
dc.subject	/639/766/119/2795
dc.subject	/639/766/119/995
dc.subject	/639/766/119/997
dc.subject	article
dc.title	Anisotropy-driven quantum criticality in an intermediate valence system.
dc.type	Article
dcterms.dateAccepted	2022-03-29
prism.issueIdentifier	1
prism.publicationName	Nat Commun
prism.volume	13
pubs.funder-project-id	Deutsche Forschungsgemeinschaft (German Research Foundation) (BR 4110/1-1)
pubs.funder-project-id	Welch Foundation (C-1818)
pubs.funder-project-id	DOE \| SC \| Basic Energy Sciences (BES) (DE-SC0019331)
rioxxterms.licenseref.uri	http://creativecommons.org/licenses/by/4.0/
rioxxterms.version	VoR
rioxxterms.versionofrecord	10.1038/s41467-022-29757-9

Anisotropy-driven quantum criticality in an intermediate valence system.

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