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dc.contributor.authorEilers, Felix
Grube, Kai
Zocco, Diego A.
Wolf, Thomas
Merz, Michael
Schweiss, Peter
Heid, Rolf
Eder, Robert
Yu, Rong
Zhu, Jian-Xin
Si, Qimiao
Shibauchi, Takasada
Löhneysen, Hilbert v.
dc.date.accessioned 2016-07-07T21:09:20Z
dc.date.available 2016-07-07T21:09:20Z
dc.date.issued 2016
dc.identifier.citation Eilers, Felix, Grube, Kai, Zocco, Diego A., et al.. "Strain-Driven Approach to Quantum Criticality in AFe2As2 with A=K, Rb, and Cs." Physical Review Letters, 116, no. 23 (2016) American Physical Society: 237003. http://dx.doi.org/10.1103/PhysRevLett.116.237003.
dc.identifier.urihttps://hdl.handle.net/1911/90838
dc.description.abstract The 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.
dc.language.iso eng
dc.publisher American Physical Society
dc.rights Article 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.
dc.title Strain-Driven Approach to Quantum Criticality in AFe2As2 with A=K, Rb, and Cs
dc.type Journal article
dc.citation.journalTitle Physical Review Letters
dc.citation.volumeNumber 116
dc.citation.issueNumber 23
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevLett.116.237003
dc.type.publication publisher version
dc.citation.firstpage 237003


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