papers

Publications (19)

cond-mat.supr-con2013

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…

cond-mat.str-el2001

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…

cond-mat.supr-con2014

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…

cond-mat.str-el2012

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…

cond-mat.supr-con2011

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…

cond-mat.supr-con2013

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…

cond-mat.supr-con2014

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…

cond-mat.supr-con2013

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…

cond-mat.supr-con2005

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…

cond-mat.supr-con2021

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…

cond-mat.supr-con2009

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…

cond-mat1996

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…

cond-mat.str-el2000

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…

cond-mat.str-el2015

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…

cond-mat.supr-con2013

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…

cond-mat.supr-con2012

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…

cond-mat.supr-con2015

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…

cond-mat.supr-con2011

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

cond-mat.supr-con2012

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…