Strain-Driven Approach to Quantum Criticality in AFe2As2 with A=K, Rb, and Cs

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dc.citation.firstpage237003en_US
dc.citation.issueNumber23en_US
dc.citation.journalTitlePhysical Review Lettersen_US
dc.citation.volumeNumber116en_US
dc.contributor.authorEilers, Felixen_US
dc.contributor.authorGrube, Kaien_US
dc.contributor.authorZocco, Diego A.en_US
dc.contributor.authorWolf, Thomasen_US
dc.contributor.authorMerz, Michaelen_US
dc.contributor.authorSchweiss, Peteren_US
dc.contributor.authorHeid, Rolfen_US
dc.contributor.authorEder, Roberten_US
dc.contributor.authorYu, Rongen_US
dc.contributor.authorZhu, Jian-Xinen_US
dc.contributor.authorSi, Qimiaoen_US
dc.contributor.authorShibauchi, Takasadaen_US
dc.contributor.authorLöhneysen, Hilbert v.en_US
dc.date.accessioned2016-07-07T21:09:20Zen_US
dc.date.available2016-07-07T21:09:20Zen_US
dc.date.issued2016en_US
dc.description.abstractThe iron-based superconductors AFe2As2 with A=K, Rb, Cs exhibit large Sommerfeld coefficients approaching those of heavy-fermion systems. We have investigated the magnetostriction and thermal expansion of this series to shed light on this unusual behavior. Quantum oscillations of the magnetostriction allow identifying the band-specific quasiparticle masses which by far exceed the band-structure derived masses. The divergence of the Grüneisen ratio derived from thermal expansion indicates that with increasing volume along the series a quantum critical point is approached. The critical fluctuations responsible for the enhancement of the quasiparticle masses appear to weaken the superconducting state.en_US
dc.identifier.citationEilers, Felix, Grube, Kai, Zocco, Diego A., et al.. "Strain-Driven Approach to Quantum Criticality in AFe2As2 with A=K, Rb, and Cs." <i>Physical Review Letters,</i> 116, no. 23 (2016) American Physical Society: 237003. http://dx.doi.org/10.1103/PhysRevLett.116.237003.en_US
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevLett.116.237003en_US
dc.identifier.urihttps://hdl.handle.net/1911/90838en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.titleStrain-Driven Approach to Quantum Criticality in AFe2As2 with A=K, Rb, and Csen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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