130 citations · 1.3k across the 48 of their papers we have counts for
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57Fe and 151Eu Mössbauer studies of 3d-4f spin interplay in EuFe(2-x)Ni(x)As2
K. Komedera, J. Gatlik, A. Blachowski +5
The EuFe(2-x)Ni(x)As2 compounds exhibiting 3d and/or 4f magnetic order were investigated by means of 57Fe and 151Eu Mössbauer spectroscopy. Additionally, results for the end member…
Pressure-induced magnetism in iron-based superconductors FeAs ( K, Cs, Rb)
Rustem Khasanov, Zurab Guguchia, Elvezio Morenzoni +5
The magnetic properties of iron-based superconductors FeAs (K, Cs, and Rb), which are characterized by the V-shaped dependence of the critical temperature ($T_{\rm c…
Electron-Phonon Interaction in Ternary Rare-Earth Copper Antimonides LaCuSb2 and La(Cu0.8Ag0.2)Sb2 probed by Yanson Point-Contact Spectroscopy
N. V. Gamayunova, D. L. Bashlakov, O. E. Kvitnitskaya +4
Investigation of the electron-phonon interaction (EPI) in LaCuSb2 and La(Cu0.8Ag0.2)Sb2 compounds by Yanson point-contact spectroscopy (PCS) has been carried out. Point-contact spe…
Superconductivity emerging from an electronic phase separation in the charge ordered phase of RbFeAs
E. Civardi, M. Moroni, M. Babij +2
As, Rb and Rb nuclear quadrupole resonance (NQR) and Rb nuclear magnetic resonance (NMR) measurements in RbFeAs iron-based superconductor are pr…
Probing the pairing symmetry in the over-doped Fe-based superconductor Ba_0.35Rb_0.65Fe_2As_2 as a function of hydrostatic pressure
Z. Guguchia, R. Khasanov, Z. Bukowski +6
We report muon spin rotation experiments on the magnetic penetration depth lambda and the temperature dependence of lambda^{-2} in the over-doped Fe-based high-temperature supercon…
Direct evidence for the emergence of a pressure induced nodal superconducting gap in the iron-based superconductor Ba_0.65Rb_0.35Fe_2As_2
Zurab Guguchia, Alex Amato, Jian Kang +10
Identifying the superconducting (SC) gap structure of the iron-based high-temperature superconductors (Fe-HTS's) remains a key issue for the understanding of superconductivity in t…
Quantum oscillations of the superconductor LaRuP : comparable mass enhancement in Ru and Fe phosphides
Philip J. W. Moll, Jakob Kanter, Ross D. McDonald +9
We have studied the angular dependent de Haas-van Alphen oscillations of LaRuP using magnetic torque in pulsed magnetic fields up to 60T. The observed oscillation frequenci…
Electric field gradient wave (EFGW) in iron-based superconductor Ba(0.6)K(0.4)Fe2As2 studied by Mössbauer spectroscopy
A. K. Jasek, K. Komedera, A. Blachowski +4
The optimally doped 122 iron-based superconductor Ba(0.6)K(0.4)Fe2As2 has been studied by 57Fe Moessbauer spectroscopy versus temperature ranging from 4.2 K till 300 K with particu…
Vortex lock-in transition and evidence for transitions among commensurate kinked vortex configurations in single-layered Fe arsenides
G. Li, G. Grissonnanche, B. S. Conner +7
We report an angle-dependent study of the magnetic torque within the vortex state of single-crystalline LaOFFeAs and SmOFFeAs as a function o…
The order-parameter symmetry and Fermi surface topology of 122 Fe-based superconductors: a point-contact Andreev-reflection study
R. S. Gonnelli, M. Tortello, D. Daghero +8
We report on the results of directional point-contact Andreev-reflection (PCAR) measurements in Ba(Fe_{1-x}Co_x)2As2 single crystals and epitaxial c-axis oriented films with x = 0.…
Point-contact spectroscopy in Co-doped CaFe2As2: nodal superconductivity and topological Fermi surface transition
R. S. Gonnelli, M. Tortello, D. Daghero +4
We performed point-contact Andreev reflection spectroscopy measurements in Ca(Fe_{1-x}Co_x)2As2 single crystals with effective x=0.060 +- 0.005. The spectra of ab-plane contacts sh…
Bulk electronic structure of superconducting LaRu2P2 single crystals measured by soft x-ray angle-resolved photoemission spectroscopy
E. Razzoli, M. Kobayashi, V. N. Strocov +10
We present a soft X-ray angle-resolved photoemission spectroscopy (SX-ARPES) study of the stoichiometric pnictide superconductor LaRu2P2. The observed electronic structure is in go…
Muon-spin rotation and magnetization studies of chemical and hydrostatic pressure effects in EuFe_{2}(As_{1-x}P_{x})_{2}
Z. Guguchia, A. Shengelaya, A. Maisuradze +7
The magnetic phase diagram of EuFe(AsP) was investigated by means of magnetization and muon-spin rotation studies as a function of chemical (isovalent sub…
Tuning superconductivity by magnetic fields in Eu(Fe0.81Co0.19)2As2
Vinh Hung Tran, Tomasz A. Zaleski, Zbigniew Bukowski +2
The distinct difference between BCS-type and unconventional triplet superconductivity manifests itself in their response to external magnetic fields. An applied field easily exting…
Interplay of composition, structure, magnetism, and superconductivity in SmFeAs1-xPxO1-y
N. D. Zhigadlo, S. Katrych, M. Bendele +12
Polycrystalline samples and single crystals of SmFeAs1-xPxO1-y were synthesized and grown employing different synthesis methods and annealing conditions. Depending on the phosphoru…
Muon-spin rotation measurements of the magnetic penetration depth in the Fe-based superconductor Ba_(1-x)Rb_(x)Fe2As2
Z. Guguchia, Z. Shermadini, A. Amato +7
Measurements of the magnetic penetration depth (lambda) in the Fe-based superconductor Ba_(1-x)Rb_xFe_2As_2 (x=0.3, 0.35, 0.4) were carried out using the muon-spin rotation muSR te…
Shape of spin density wave versus temperature in AFe2As2 (A=Ca, Ba, Eu): A Mössbauer study
A. Blachowski, K. Ruebenbauer, J. Zukrowski +3
Parent compounds AFe2As2 (A=Ca, Ba, Eu) of the 122 family of the iron-based superconductors have been studied by 57Fe Moessbauer spectroscopy in the temperature range 4.2 K - ~300…
{Rearrangement of the antiferromagnetic ordering at high magnetic fields in SmFeAsO and SmFeAsOF single crystals
S. Weyeneth, P. J. W. Moll, R. Puzniak +11
The low-temperature antiferromagnetic state of the Sm-ions in both nonsuperconducting SmFeAsO and superconducting SmFeAsOF single crystals was studied by magnetic t…
Doping dependence of the Nernst effect in Eu(Fe1-xCox)2As2 - departure from Dirac fermions physics
Marcin Matusiak, Zbigniew Bukowski, Janusz Karpinski
We report a systematic study of the transport properties in the series of Eu(Fe1-xCox)2As2 single crystals with x = 0, 0.15, 0.20 and 0.30. Spin-density-wave order is observed in t…
Anomalies in the Fermi surface and band dispersion of quasi-one-dimensional CuO chains in the high-temperature superconductor YBa2Cu4O8
Takeshi Kondo, R. Khasanov, J. Karpinski +12
We have investigated the electronic states in quasi one dimensional (1D) CuO chains by microprobe Angle Resolved Photoemission Spectroscopy. We find that the quasiparticle Fermi su…
Fermi-surface of underdoped LaFeAsO1-xFx as determined by the Haas-van Alphen-effect
G. Li, B. S. Conner, S. Weyeneth +7
Here, we present a de Haas-van Alphen (dHvA) effect1 study on the newly discovered LaFeAsO1-xFx compounds2,3 in order to unveil the topography of the Fermi surface associated with…
Th substituted SmFeAsO: structural details and superconductivity with Tc above 50 K
N. D. Zhigadlo, S. Katrych, S. Weyeneth +6
Superconducting poly- and single-crystalline samples of Sm1-xThxFeAsO with partial substitution of Sm3+ by Th4+ were synthesized and grown under high pressure and their structural,…
Microscopic Study of the Superconducting State of the Iron Pnictide RbFe_2As_2
Z. Shermadini, J. Kanter, C. Baines +9
A study of the temperature and field dependence of the penetration depth λof the superconductor RbFe_2As_2 (T_c=2.52 K) was carried out by means of muon-spin rotation measurements.…
Quasiparticle relaxation dynamics in spin-density-wave and superconducting SmFeAsO_{1-x}F_{x} single crystals
T. Mertelj, P. Kusar, V. V. Kabanov +7
We investigate the quasiparticle relaxation and low-energy electronic structure in undoped SmFeAsO and near-optimally doped SmFeAsO_{0.8}F_{0.2} single crystals - exhibiting spin-d…