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Multiband Superconductivity in KFe2As2: Evidence for one Isotropic and several Liliputian Energy Gaps
Frederic Hardy, Robert Eder, Martin Jackson +9
We report a detailed low-temperature thermodynamic investigation (heat capacity and magnetization) of the superconducting state of KFe2As2 for H || c axis. Our measurements reveal…
Unusual band renormalization in the simplest iron based superconductor
J. Maletz, V. B. Zabolotnyy, D. V. Evtushinsky +9
The electronic structure of the iron chalcogenide superconductor FeSe_{1-x} was investigated by high- resolution angle-resolved photoemission spectroscopy (ARPES). The results were…
Nematic susceptibility of hole- and electron-doped BaFe2As2 iron-based superconductors from shear modulus measurements
A. E. Böhmer, P. Burger, F. Hardy +6
The nematic susceptibility of hole-doped Ba1-xKxFe2As2 and electron-doped Ba(Fe1-xCox)2As2 iron-based superconductors is obtained from measurements of the elastic shear modulus usi…
Lack of coupling between superconductivity and orthorhombic distortion in stoichiometric single-crystalline FeSe
A. E. Böhmer, F. Hardy, F. Eilers +5
The coupling between superconductivity and othorhombic distortion is studied in vapor-grown FeSe single crystals using high-resolution thermal-expansion measurements. In contrast t…
Strong Pauli-limiting behavior of and uniaxial pressure dependencies in KFe2As2
P. Burger, F. Hardy, D. Aoki +8
KFe2As2 single crystals are studied using specific-heat, high-resolution thermal-expansion, magnetization, and magnetostriction measurements. The magnetization and magnetostriction…
Evidence of Strong Correlations and Coherence-Incoherence Crossover in the Iron Pnictide Superconductor KFe2As2
F. Hardy, A. E. Boehmer, D. Aoki +9
Using resistivity, heat-capacity, thermal-expansion, and susceptibility measurements we study the normal-state behavior of KFe2As2. We find that both the Sommerfeld coefficient gam…