232 citations · 1.3k across the 27 of their papers we have counts for
19 papers · 1 filter
-spacing distributions as a probe of nematoelastic response in iron-based superconductors
Wenting Zhang, Ruixian Liu, Tingjun Zhang +14
Electronic nematicity in iron-based superconductors (FeSCs) couples bilinearly to orthorhombic strain, allowing nematic correlations to appear in the lattice response. Here we use…
Ferromagnetic inter-layer coupling in FeSeS superconductors revealed by inelastic neutron scattering
Mingwei Ma, Philippe Bourges, Yvan Sidis +8
FeSeS superconductors are commonly considered layered van der Waals materials with negligible inter-layer coupling. Here, using inelastic neutron scattering to study…
Frustrated magnetic interactions in FeSe
Yiqing Gu, Qisi Wang, Hongliang Wo +7
The structurally simplest high-temperature superconductor FeSe exhibits an intriguing superconducting nematic paramagnetic phase with unusual spin excitation spectra that are diffe…
Nematic fluctuations in the non-superconducting iron pnictide BaFeNiCrAs
Dongliang Gong, Ming Yi, Meng Wang +16
The main driven force of the electronic nematic phase in iron-based superconductors is still under debate. Here, we report a comprehensive study on the nematic fluctuations in a no…
Polarized neutron scattering studies of magnetic excitations in iron-selenide superconductor (LiFe)ODFeSe ( = 41 K)
Die Hu, Yu Feng, Jitae T. Park +5
We report polarized neutron scattering measurements of the low energy spin fluctuations of the iron-selenide superconductor LiFeODFeSe below and above its supercond…
Strong Spin Resonance Mode associated with suppression of soft magnetic ordering in Hole-doped Ba1-xNaxFe2As2
F. Wasser, J. -T. Park, S. Aswartham +6
Spin-resonance modes (SRM) are taken as evidence for magnetically driven pairing in Fe-based superconductors, but their character remains poorly understood. The broadness, the spli…
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…
Enhanced low-energy magnetic excitations via suppression of the itinerancy in Fe0.98-zCuzTe0.5Se0.5
Jinsheng Wen, Shichao Li, Zhijun Xu +12
We have performed resistivity and inelastic neutron scattering measurements on three samples of Fe0.98-zCuzTe0.5Se0.5 with z = 0, 0.02, and 0.1. It is found that with increasing Cu…
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…
Conformity of spin fluctuations in alkali-metal iron selenide superconductors inferred from the observation of a magnetic resonant mode in K(x)Fe(2-y)Se(2)
G. Friemel, W. P. Liu, E. A. Goremychkin +6
Spin excitations stemming from the metallic phase of the ferrochalcogenide superconductor K(0.77)Fe(1.85)Se(2) (T_c=32 K) were mapped out in the ab plane by means of the time-of-fl…
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…
Raman Scattering Study of the Lattice Dynamics of Superconducting LiFeAs
Y. J. Um, J. T. Park, B. H. Min +4
We report an investigation of the lattice dynamical properties of LiFeAs using inelastic light scattering. Five out of the six expected phonon modes are observed. The temperature e…
Evidence for conventional superconductivity in SrPd2Ge2
T. K. Kim, A. N. Yaresko, V. B. Zabolotnyy +12
Electronic structure of SrPd2Ge2 single crystals is studied by angle-resolved photoemission spectroscopy (ARPES), scanning tunneling spectroscopy (STS) and band-structure calculati…
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…
Weak superconducting pairing and a single isotropic energy gap in stoichiometric LiFeAs
D. S. Inosov, J. S. White, D. V. Evtushinsky +15
We report superconducting (SC) properties of stoichiometric LiFeAs (Tc = 17 K) studied by small-angle neutron scattering (SANS) and angle-resolved photoemission (ARPES). Although t…
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…
Two-gap superconductivity in Ba_1-xK_xFe_2As_2: A complementary study of the magnetic penetration depth by \muSR and ARPES
R. Khasanov, D. V. Evtushinsky, A. Amato +9
We investigate the magnetic penetration depth λin superconducting Ba_1-xK_xFe_2As_2 (T_c\simeq32K) with muon-spin rotation (\muSR) and angle-resolved photoemission (ARPES). Using \…
(pi,pi)-electronic order in iron arsenide superconductors
V. B. Zabolotnyy, D. S. Inosov, D. V. Evtushinsky +14
The distribution of valence electrons in metals usually follows the symmetry of an ionic lattice. Modulations of this distribution often occur when those electrons are not stable w…