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dc.contributor.authorMorice, Cen
dc.contributor.authorChandra, Pen
dc.contributor.authorRowley, Stephenen
dc.contributor.authorLonzarich, Gilberten
dc.contributor.authorSaxena, Siddharthen
dc.date.accessioned2019-07-10T12:51:48Z
dc.date.available2019-07-10T12:51:48Z
dc.date.issued2017-12-04en
dc.identifier.issn2469-9950
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/294518
dc.description.abstractHere, we present an alternative approach for the description of quantum critical fluctuations. These are described by Langevin random fields, which are then related to the susceptibility using the fluctuation-dissipation theorem. We use this approach to characterize the physical properties arising in the vicinity of two coupled quantum phase transitions. We consider a phenomenological model based on two scalar order parameter fields locally coupled biquadratically and having a common quantum critical point as a function of a quantum tuning parameter such as pressure or magnetic field. A self-consistent treatment shows that the uniform static susceptibilities of the two order parameter fields have the same qualitative form at low temperature even where the forms are different in the absence of the biquadratic coupling.
dc.description.sponsorshipWe acknowledge support from EPSRC, Corpus Christi College, the National Science Foundation Grant No. NSF DMR-1334428, and the Increase Competitiveness Program of the Ministry of Education of the Russian Federation Grant No. NUST MISiS K2-2017-024. We are grateful to Trinity College Cambridge, the Cavendish Laboratory, and the Aspen Center for Physics, supported by National Science Foundation Grant No. NSF PHY-1066293, for hospitality. S.E.R. acknowledges support from a CONFAP Newton grant.
dc.publisherAPS
dc.titleHidden fluctuations close to a quantum bicritical pointen
dc.typeArticle
prism.issueIdentifier24en
prism.number245104en
prism.publicationDate2017en
prism.publicationNamePhysical Review Ben
prism.volume96en
dc.identifier.doi10.17863/CAM.15672
rioxxterms.versionofrecord10.1103/PhysRevB.96.245104en
rioxxterms.versionVoR*
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2017-12-04en
dc.contributor.orcidSaxena, Siddharth [0000-0002-6321-5629]
dc.identifier.eissn2469-9969
rioxxterms.typeJournal Article/Reviewen
cam.issuedOnline2017-12-15en
dc.identifier.urlhttps://journals.aps.org/prb/abstract/10.1103/PhysRevB.96.245104en


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