99 citations · 761 across the 20 of their papers we have counts for
20 papers
Anisotropy and multiband superconductivity in Sr2RuO4
S. J. Kuhn, W. Morgenlander, E. R. Louden +8
Despite numerous studies the exact nature of the order parameter in superconducting Sr2RuO4 remains unresolved. We have extended previous small-angle neutron scattering studies of…
Unusual nodal behaviors of the superconducting gap in the iron-based superconductor Ba(FeRu)As: Effects of spin-orbit coupling
L. Liu, K. Okazaki, T. Yoshida +22
We have investigated the superconducting gap of optimally doped Ba(FeRu)As by angle-resolved photoemission spectroscopy (APRES) using bulk-sensitive 7 eV…
Suppression of low-energy longitudinal spin-excitations in Co-underdoped BaFe2As2
F. Waßer, C. H. Lee, K. Kihou +4
Polarized inelastic neutron scattering experiments were performed to study magnetic excitations in the normal and superconducting phases of Co-underdoped BaFeAs, which exhi…
Simultaneous Evidence for Pauli Paramagnetic Effects and Multiband Superconductivity in KFeAs by Small-Angle Neutron Scattering Studies of the Vortex Lattice
S. J. Kuhn, H. Kawano-Furukawa, E. Jellyman +11
We study the intrinsic anisotropy of the superconducting state in KFeAs, using small-angle neutron scattering to image the vortex lattice as the applied magnetic field is r…
In-plane electronic anisotropy in the antiferromagnetic-orthorhombic phase of isovalent-substituted Ba(FeRu)As
L. Liu, T. Mikami, S. Ishida +17
We have studied the anisotropy in the in-plane resistivity and the electronic structure of isovalent Ru-substituted BaFeAs in the antiferromagnetic-orthorhombic phase using…
Anisotropy of incommensurate magnetic excitations in slightly overdoped BaKFeAs probed by polarized inelastic neutron scattering experiments
N. Qureshi, C. H. Lee, K. Kihou +3
Polarized neutron scattering experiments on the slightly overdoped superconductor BaKFeAs reveal broad magnetic resonance scattering peaking at approximatel…
Magnetic form factor analysis on detwinned single crystal of BaFeAs
K. Kodama, M. Ishikado, S. Wakimoto +5
We have performed neutron diffraction measurement on a single crystal of parent compound of iron-based superconductor, BaFeAs at 12~K. In order to investigate in-plane anis…
Vortex lattice structure in BaFe2(As0.67P0.33)2 by the small-angle neutron scattering technique
R. Morisaki-Ishii, H. Kawano-Furukawa, A. S. Cameron +16
We have observed a magnetic vortex lattice (VL) in BaFe2(As_{0.67}P_{0.33})2 (BFAP) single crystals by small-angle neutron scattering (SANS). With the field along the c-axis, a nea…
Electronic structure of BaNiP observed by angle-resolved photoemission spectroscopy
S. Ideta, T. Yoshida, M. Nakajima +16
We have performed an angle-resolved photoemission spectroscopy (ARPES) study of BaNiP which shows a superconducting transition at 2.5 K. We observed hole and e…
Superconducting gap with sign reversal between hole pockets in heavily hole-doped Ba1-xKxFe2As2
D. Watanabe, T. Yamashita, Y. Kawamoto +16
To gain insight into the unconventional superconductivity of Fe-pnictides with no electron pockets, we measure the thermal conductivity and penetration depth in the heavily…
Evidence for exclusion of the possibility of -wave superconducting-gap symmetry in Ba-doped KFeAs
Y. Ota, K. Okazaki, Y. Kotani +12
We have investigated the superconducting(SC)-gap anisotropy for several Ba-doped KFeAs samples using laser-based angle-resolved photoemission spectroscopy. We show that the…
Effects of Zn substitution on the electronic structure of BaFeAs revealed by angle-resolved photoemission spectroscopy
S. Ideta, T. Yoshida, M. Nakajima +13
In Fe-based superconductors, electron doping is often realized by the substitution of transition-metal atoms for Fe. In order to investigate how the electronic structure of the par…
Effect of Co doping on the in-plane anisotropy in the optical spectrum of underdoped Ba(Fe1-xCox)2As2
M. Nakajima, S. Ishida, Y. Tomioka +7
We investigated the anisotropy in the in-plane optical spectra of detwinned Ba(Fe1-xCox)2As2. The optical conductivity spectrum of BaFe2As2 shows appreciable anisotropy in the magn…
Anisotropy of the in-plane resistivity of underdoped Ba(FeCo)As superconductors induced by impurity scattering in the antiferromagnetic orthorhombic phase
S. Ishida, M. Nakajima, T. Liang +8
We investigated the in-plane resistivity anisotropy for underdoped Ba(FeCo)As single crystals with improved quality. We demonstrate that the anisotropy in resis…
Dependence of carrier doping on the impurity potential in transition-metal-substituted FeAs-based superconductors
S. Ideta, T. Yoshida, I. Nishi +15
In order to examine to what extent the rigid-band-like electron doping scenario is applicable to the transition metal-substituted Fe-based superconductors, we have performed angle-…
Abrupt change in the energy gap of superconducting Ba1-xKxFe2As2 single crystals with hole doping
W. Malaeb, T. Shimojima, Y. Ishida +17
We performed a Laser angle-resolved photoemission spectroscopy (ARPES) study on a wide doping range of Ba1-xKxFe2As2 (BaK) and precisely determined the doping evolution of the supe…
Manifestations of multiple-carrier charge transport in the magnetostructurally ordered phase of undoped BaFeAs
S. Ishida, T. Liang, M. Nakajima +10
We investigated the transport properties of BaFeAs single crystals before and after annealing with BaAs powder. The annealing remarkably improves transport properties, in p…
The pairing state in KFe2As2 studied by measurements of the magnetic vortex lattice
H. Kawano-Furukawa, C. J. Bowell, J. S. White +14
Understanding the mechanism and symmetry of electron pairing in iron-based superconductors represents an important challenge in condensed matter physics [1-3]. The observation of m…
Spin Pseudo Gap in La2-xSrxCuO4 Studied by Neutron Scattering
C. H. Lee, K. Yamada, H. Hiraka +2
Spin excitations of La2-xSrxCuO have been studied using inelastic neutron scattering techniques in the energy range of 2 meV =< w =< 12 meV and the temperature range of 8 K =< T =<…
XANES study of rare-earth valency in LRu4P12 (L = Ce and Pr)
C. H. Lee, H. Oyanagi, C. Sekine +2
Valency of Ce and Pr in LRu4P12 (L = Ce and Pr) was studied by L2,3-edge x-ray absorption near-edge structure (XANES) spectroscopy. The Ce-L3 XANES spectrum suggests that Ce is mai…