185 citations · 1.6k across the 44 of their papers we have counts for
15 papers · 1 filter
High Tc superconductivity in CaKFeAs in absence of nematic fluctuations
W. -L. Zhang, W. R. Meier, T. Kong +2
We employ polarization-resolved Raman spectroscopy to study multi-band stoichiometric superconductor CaKFeAs. The B symmetry Raman response shows no signatures of Po…
Raman scattering study of NaFeCuAs
W. -L. Zhang, Y. Song, W. -Y. Wang +3
We use polarization-resolved Raman scattering to study lattice dynamics in NaFeCuAs single crystals. We identify 4 phonon modes at 125, 172, 183 and 197…
Anomalous magneto-elastic coupling in Au-doped BaFe2As2
S. -F. Wu, W. -L. Zhang, L. Li +6
We used polarization-resolved Raman scattering to study magneto-elastic coupling in Ba(FeAu)As crystals as a function of light Au-doping, materials for which…
Magneto-elastic coupling in Fe-based superconductors
S. -F. Wu, W. -L. Zhang, V. K. Thorsmølle +12
We used polarization-resolved Raman scattering to study the magneto-elastic coupling in the parent compounds of several families of Fe-based superconductors (BaFe2As2, EuFe2As2, Na…
Quadrupolar charge dynamics in the nonmagnetic FeSeS superconductors
W. -L. Zhang, S. -F. Wu, S. Kasahara +3
We use polarization-resolved electronic Raman spectroscopy to study charge dynamics in non-magnetic FeSeS superconductor. We observe two features of the quadrupole…
Superconductivity and electronic fluctuations in BaKFeAs studied by Raman scattering
S. -F. Wu, P. Richard, H. Ding +6
Using polarization-resolved electronic Raman scattering we study under-doped, optimally-doped and over-doped BaKFeAs samples in the normal and superconducting…
Critical Quadrupole Fluctuations and Collective Modes in Iron Pnictide Superconductors
V. K. Thorsmølle, M. Khodas, Z. P. Yin +4
The multiband nature of iron pnictides gives rise to a rich temperature-doping phase diagram of competing orders and a plethora of collective phenomena. At low dopings, the tetrago…
Isotropic multi-gap superconductivity in BaFe1.9Pt0.1As2 from thermal transport and spectroscopic measurements
Steven Ziemak, K. Kirshenbaum, S. R. Saha +11
Thermal conductivity, point contact spectroscopy, angle-resolved photoemission and Raman spectroscopy measurements were performed on BaFe1.9Pt0.1As2 single crystals obtained from t…
Structural phase transition below 250 K in superconducting KFeSe
A. Ignatov, A. Kumar, P. Lubik +5
Vibrational properties of iron-chalcogenide superconductor KFeSe with 30 K have been measured by Raman and optical spectroscopies over temperatu…
Screening of the Raman response in multiband superconductors -- application to iron-pnictides
Christoph Sauer, Girsh Blumberg
We performed model calculations of Raman responses for multiband 2D superconductors. The multiband effects of screening in the A_{1g} symmetry channel were investigated analyticall…
Observation of Leggett's collective mode in a multi-band MgB2 superconductor
G. Blumberg, A. Mialitsin, B. S. Dennis +3
We report observation of Leggett's collective mode in a multi-band MgB2 superconductor with T_c=39K arising from the fluctuations in the relative phase between two superconducting…
Multi-Gap Superconductivity in MgB2: Magneto-Raman Spectroscopy
G. Blumberg, A. Mialitsin, B. S. Dennis +2
Electronic Raman scattering studies on MgB2 single crystals as a function of excitation and polarization have revealed three distinct superconducting features: a clean gap below 37…
Anharmonicity and self-energy effects of the E2g phonon in MgB2
A. Mialitsin, B. S. Dennis, N. D. Zhigadlo +2
We present a Raman scattering study of the E2g phonon anharmonicity and of superconductivity induced self-energy effects in MgB2 single crystals. We show that anharmonic two phonon…
Evolution of Magnetic and Superconducting Fluctuations with Doping of High-Tc Superconductors
G. Blumberg, M. Kang, M. V. Klein +2
Electronic Raman scattering from high- and low-energy excitations was studied as a function of temperature, extent of hole doping, and energy of the incident photons in Bi_2Sr_2CaC…
Evolution of Magnetic and Superconducting Fluctuations with Doping of High-Tc Superconductors (An electronic Raman scattering study)
G. Blumberg, M. V. Klein, K. Kadowaki +3
For YBa_2Cu_3O_{6+δ} and Bi_2Sr_2CaCu_2O_8 superconductors, electronic Raman scattering from high- and low-energy excitations has been studied in relation to the hole doping level,…