366 citations · 1.5k across the 25 of their papers we have counts for
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Impurity effects on spin dynamics in magnetic and superconducting iron pnictides and chalcogenides
M. A. Surmach, P. Y. Portnichenko, J. T. Park +5
In this paper we summarize the effects of magnetic and nonmagnetic impurities on the spin dynamics in Febased superconductors and their parent compounds. The effects of chemical su…
Spin-density-wave-induced anomalies in the optical conductivity of AFe2As2, (A=Ca, Sr, Ba) single-crystalline iron pnictides
A. Charnukha, D. Pröpper, T. I. Larkin +6
We report the complex dielectric function of high-quality , (=Ca, Sr, Ba) single crystals with , $200\ \textrm…
Quantum Criticality in Electron-doped BaFe_{2-x}Ni_xAs_2
R. Zhou, Z. Li, J. Yang +3
A quantum critical point (QCP) is a point in a system's phase diagram at which an order is completely suppressed at absolute zero temperature (T). The presence of a quantum critica…
Possible realization of an antiferromagnetic Griffiths phase in Ba[Fe(1-x)Mn(x)](2)As(2)
D. S. Inosov, G. Friemel, J. T. Park +15
We investigate magnetic ordering in metallic Ba[Fe(1-x)Mn(x)](2)As(2) and discuss the unusual magnetic phase, which was recently discovered for Mn concentrations x > 10%. We argue…
Mn local moments prevent superconductivity in iron-pnictides Ba(Fe 1-x Mn x)2As2
Y. Texier, Y. Laplace, P. Mendels +6
75As nuclear magnetic resonance (NMR) experiments were performed on Ba(Fe1-xMnx)2As2 (xMn = 2.5%, 5% and 12%) single crystals. The Fe layer magnetic susceptibility far from Mn atom…
Similar zone-center gaps in the low-energy spin-wave spectra of NaFeAs and BaFe2As2
J. T. Park, G. Friemel, T. Loew +10
We report results of inelastic-neutron-scattering measurements of low-energy spin-wave excitations in two structurally distinct families of iron-pnictide parent compounds: Na(1-δ)F…
Strong pairing at iron orbitals in hole-doped BaFeAs
D. V. Evtushinsky, V. B. Zabolotnyy, T. K. Kim +14
Among numerous hypotheses, recently proposed to explain superconductivity in iron-based superconductors [1-9], many consider Fermi surface (FS) nesting [2, 4, 8, 10] and dimensiona…
Microscopic coexistence of antiferromagnetic order and superconductivity in BaKFeAs
Z. Li, R. Zhou, D. L. Sun +3
We report ^{75}As nuclear magnetic resonance studies on an underdoped single-crystal Ba0.77K0.23Fe2As2 with Tc = 16.5 K. Below T_N = 46 K, the NMR peaks for H//c split and those fo…
Upper critical magnetic field in Ba_0.68K_0.32Fe_2As_2 and Ba(Fe_0.93Co_0.07)_2As_2
V. A. Gasparov, L. Drigo, A. Audouard +6
We report measurements of the temperature dependence of the radio-frequency magnetic penetration depth in Ba_0.68K_0.32Fe_2As_2 and Ba(Fe_0.93Co_0.07)_2As_2 single crystals in puls…
Eliashberg approach to superconductivity-induced infrared anomalies in Ba0.68K0.32Fe2As2
A. Charnukha, O. V. Dolgov, A. A. Golubov +5
We report the full complex dielectric function of high-purity single crystals with …
Nodeless energy gaps of single-crystalline Ba0.68K0.32Fe2As2 as seen via 75As NMR
Z. Li, D. L. Sun, C. T. Lin +3
We report As nuclear magnetic resonance studies on a very clean hole-doped single-crystal BaKFeAs ( K). The spin-lattice rela…
Electron transport and anisotropy of the upper critical magnetic field in a Ba0.68K0.32Fe2As2 single crystals
V. A. Gasparov, F. Wolff-Fabris, D. L. Sun +2
Early work on the iron-arsenide compounds supported the view, that a reduced dimensionality might be a necessary prerequisite for high-Tc superconductivity. Later, however, it was…
Normal state resistivity of BaKFeAs: evidence for multiband strong-coupling behavior
A. A. Golubov, O. V. Dolgov, A. V. Boris +7
We present theoretical analysis of the normal state resistivity in multiband superconductors in the framework of Eliashberg theory. The results are compared with measurements of th…
Symmetry of spin excitation spectra in the tetragonal paramagnetic and superconducting phases of 122-ferropnictides
J. T. Park, D. S. Inosov, A. Yaresko +16
We study the symmetry of spin excitation spectra in 122-ferropnictide superconductors by comparing the results of first-principles calculations with inelastic neutron scattering (I…
Very strong intrinsic supercurrent carrying ability and vortex avalanches in (Ba,K)Fe2As2 superconducting single crystals
Xiao-Lin Wang, S. R. Ghorbani, Sung-Ik Lee +9
We report that single crystals of (Ba,K)Fe2As2 with Tc = 32 K have a pinning potential, U0, as high as 10^4 K, with U0 showing very little field depend-ence. In addition, the (Ba,K…
Specific heat of Ba0.68K0.32Fe2As2: evidence for multiband strong-coupling superconductivity
P. Popovich, A. V. Boris, O. V. Dolgov +5
The specific heat of high-purity single crystals with the highest reported superconducting = 38.5 K was studied. The electronic specific heat,…
Symmetry and disorder of the vitreous vortex lattice in an overdoped BaFe_{2-x}Co_xAs_2 superconductor: Indication for strong single-vortex pinning
D. S. Inosov, T. Shapoval, V. Neu +14
The disordered flux line lattice in single crystals of the slightly overdoped aFe_{2-x}Co_xAs_2 (x = 0.19, Tc = 23 K) superconductor is studied by magnetization measurements, small…
Large single crystal growth of BaFe1.87Co0.13As2 using a nucleation pole
D. L. Sun, Y. Liu, J. T. Park +1
Co-doped iron arsenic single crystal of BaFe1.87Co0.13As2 with dimension up to 20 x 10 x 2 mm3 were grown by a nucleation pole: an alumina stick served as nucleation center during…
Self-energy effects and electron-phonon coupling in Fe-As superconductors
K. -Y. Choi, P. Lemmens, I. Eremin +5
We report on Raman scattering experiments of the undoped SrFe2As2 and superconducting Sr0.85K0.15Fe2As2 (Tc=28K) and Ba0.72K0.28Fe2As2 (Tc=32K) single crystals. The frequency and l…
Normal-State Spin Dynamics and Temperature-Dependent Spin Resonance Energy in an Optimally Doped Iron Arsenide Superconductor
D. S. Inosov, J. T. Park, P. Bourges +8
The proximity of superconductivity and antiferromagnetism in the phase diagram of iron arsenides, the apparently weak electron-phonon coupling and the "resonance peak" in the super…
Transport properties and the anisotropy of Ba_{1-x}K_xFe_2As_2 single crystals in normal and superconducting states
V. N. Zverev, A. V. Korobenko, G. L. Sun +3
The transport and superconducting properties of Ba_{1-x}K_xFe_2As_2 single crystals with T_c = 31 K were studied. Both in-plane and out-of plane resistivity was measured by modifie…
Anisotropic spin fluctuations and multiple superconducting gaps in hole-doped Ba_0.7K_0.3Fe_2As_2: NMR in a single crystal
K. Matano, G. L. Sun, D. L. Sun +3
We report the first ^{75}As-NMR study on a single crystal of the hole-doped iron-pnictide superconductor Ba_{0.7}K_{0.3}Fe_2As_{2} (T_c = 31.5 K). We find that the Fe antiferromagn…
Iron pnictides: Single crystal growth and effect of doping on structural, transport and magnetic properties
G. L. Sun, D. L. Sun, M. Konuma +6
We demonstrate the preparation of large, free standing iron pnictide single crystals with a size up to 20 x 10 x 1 mm3 using solvents in zirconia crucibles under argon atmosphere.…