Publications (19)
Fermi-surface reconstruction involving two Van Hove singularities across the antiferromagnetic transition in BaFe2As2
Y. Nakashima, A. Ino, S. Nagato +14
We report an angle-resolved photoemission study of BaFe2As2, a parent compound of iron-based superconductors. Low-energy tunable excitation photons have allowed the first observati…
Spin-density-wave transition of (TMTSF)PF at high magnetic fields
N. Matsunaga, K. Yamashita, H. Kotani +6
The transverse magnetoresistance of the Bechgaard salt (TMTSF)PF has been measured for various pressures, with the field up to 24 T parallel to the lowest conductivity dire…
Important Roles of Te 5p and Ir 5d Spin-orbit Interactions on the Multi-band Electronic Structure of Triangular Lattice Superconductor Ir1-xPtxTe2
D. Ootsuki, T. Toriyama, M. Kobayashi +15
We report an angle-resolved photoemission spectroscopy (ARPES) study on a triangular lattice superconductor IrPtTe in which the Ir-Ir or Te-Te bond formation, the…
Pseudogap behavior of RuP probed by photoemission spectroscopy
K. Sato, D. Ootsuki, Y. Wakisaka +8
We have studied the electronic structure of RuP and related Ru pnictides using photoemission spectroscopy. Ru 3d core-level and valence-band spectra of RuP show that the Ru valence…
Energy-Dependent Enhancement of the Electron-Coupling Spectrum of the Underdoped Bi2Sr2CaCu2O8+d Superconductor
H. Anzai, A. Ino, T. Kamo +8
We have determined the electron-coupling spectrum of superconducting Bi2Sr2CaCu2O8+d from high-resolution angle-resolved photoemission spectra by two deconvolution-free robust meth…
Pseudogap formation above the superconducting dome in iron-pnictides
T. Shimojima, T. Sonobe, W. Malaeb +29
The nature of the pseudogap in high transition temperature (high-Tc) superconducting cuprates has been a major issue in condensed matter physics. It is still unclear whether the hi…
Fate of / orbital degeneracy and Fermi surface in Ru substituted FeSeTe
T. Sugimoto, D. Ootsuki, K. Sawada +14
We have investigated the impact of Ru substitution on the multi-band electronic structure of FeSeTe by means of angle-resolved photoemission spectroscopy (ARPES). The A…
Importance of both spin and orbital fluctuations in BaFe2(As1-xPx)2 : Evidence from superconducting gap anisotropy
T. Yoshida, S. Ideta, T. Shimojima +32
In the iron pnictide superconductors, two distinct unconventional mechanisms of superconductivity have been put forth: One is mediated by spin fluctuations leading to the s+- state…
Cyclotron resonance in the quasi-1D organic superconductor (TMTSF)2ClO4
S. Takahashi, S. Hill, S. Takasaki +2
We report the observation of cyclotron resonance (CR) in a metal possessing pure quasi-one-dimensional Fermiology - namely, the organic linear-chain compound (TMTSF)2ClO4, whose Fe…
Hybridization of Bogoliubov-quasiparticles between adjacent CuO layers in the triple-layer cuprate BiSrCaCuO studied by ARPES
S. Ideta, S. Johnston, T. Yoshida +13
Hybridization of Bogoliubov quasiparticles (BQPs) between the CuO layers in the triple-layer cuprate high-temperature superconductor BiSrCaCuO is stud…
Enhanced superconducting gaps in the tri-layer high- cuprate BiSrCaCuO
S. Ideta, K. Takashima, M. Hashimoto +15
We have investigated the optimally doped tri-layer cuprate BiSrCaCuO (Bi2223) by angle-resolved photoemission spectroscopy, and observed energy bands and…
Quantum Hall Transitions in (TMTSF)PF
S. Valfells, J. S. Brooks, Z. Wang +4
We have studied the temperature dependence of the integer quantum Hall transitions in the molecular crystal (TMTSF)PF. We find that the transition width between the quantum…
SDW and FISDW transition of (TMTSF)ClO at high magnetic fields
N. Matsunaga, A. Briggs, A. Ishikawa +5
The magnetic field dependence of the SDW transition in (TMTSF)ClO for various anion cooling rates has been measured, with the field up to 27T parallel to the lowest conduct…
Temperature evolution of correlation strength in the superconducting state of high-Tc cuprates
S. Kudo, T. Yoshida, S. Ideta +11
We have performed an angle-resolved photoemission study of the nodal quasi-particle spectra of the high-Tc cuprate tri-layer Bi2Sr2Ca2Cu3O10+d (Tc~ 110 K). The spectral weight Z of…
Electronic structure reconstruction by orbital symmetry breaking in IrTe2
D. Ootsuki, S. Pyon, K. Kudo +10
We report an angle-resolved photoemission spectroscopy (ARPES) study on IrTe2 which exhibits an interesting lattice distortion below 270 K and becomes triangular lattice supercondu…
Effect of electron-phonon coupling in the ARPES spectra of the tri-layer cuprate BiSrCaCuO
S. Ideta, T. Yoshida, M. Hashimoto +9
Angle-resolved photoemission spectroscopy using tunable low energy photons allows us to study the quasi-particle (QP) dispersions of the inner and outer CuO2 planes (IP and OP) sep…
Suppression of the antiferromagnetic pseudogap in the electron-doped high-temperature superconductor by "protect annealing"
M. Horio, T. Adachi, Y. Mori +17
In the hole-doped cuprates, a small amount of carriers suppresses antiferromagnetism and induces superconductivity. In the electron-doped cuprates, on the other hand, superconducti…
An energy scale directly related to superconductivity in the high- cuprate superconductors: Universality from the Fermi arc picture
S. Ideta, T. Yoshida, A. Fujimori +10
We have performed a temperature dependent angle-resolved photoemission spectroscopy (ARPES) study of the tri-layer high- cuprate superconductor (HTSC) BiSrCaCu…
Orbital Degeneracy and Peierls Instability in Triangular Lattice Superconductor IrPtTe
D. Ootsuki, Y. Wakisaka, S. Pyon +8
We have studied electronic structure of triangular lattice IrPtTe superconductor using photoemission spectroscopy and model calculations. Ir core-level photoem…