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

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    Author
    Eilers, Felix; Grube, Kai; Zocco, Diego A.; Wolf, Thomas; Merz, Michael; More... Schweiss, Peter; Heid, Rolf; Eder, Robert; Yu, Rong; Zhu, Jian-Xin; Si, Qimiao; Shibauchi, Takasada; Löhneysen, Hilbert v. Less...
    Date
    2016
    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.
    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.
    Published Version
    http://dx.doi.org/10.1103/PhysRevLett.116.237003
    Type
    Journal article
    Publisher
    American Physical Society
    Citable link to this page
    https://hdl.handle.net/1911/90838
    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.
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    • Faculty Publications [5397]
    • Physics and Astronomy Publications [1864]

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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
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    Site Map