Advances in Superconductivity XI
Proceedings of the 11th International Symposium on Superconductivity (ISS ’98), November 16 – 19, 1998, Fukuoka
Page
%P
-
Article
Open AccessUnsupervised clustering for identifying spatial inhomogeneity on local electronic structures
Spatial inhomogeneity on the electronic structure is one of the vital keys to provide a better understanding of the emergent quantum phenomenon. Given the recent developments on spatially resolved ARPES (ARPES...
-
Article
Open AccessImportance of \({{d}}_{{{xy}}}\) orbital and electron correlation in iron-based superconductors revealed by phase diagram for 1111-system
The structural flexibility at three substitution sites in LaFeAsO enabled investigation of the relation between superconductivity and structural parameters over a wide range of crystal compositions. Substituti...
-
Article
Multi-frequency ESR in EuFe2As2
We have performed multi-frequency electron spin resonance (ESR) measurements on EuFe2As2, which is one of the parent compounds of Fe-based superconductors. At T SDW=190 K, this compound sh...
-
Article
‘Fragile Superconductivity’: A Kinetic Glass Transition in the Vortex Matter of the High-temperature Superconductor YBa2 Cu3O7-δ
Using high-resolution thermal expansion and magnetization measurements, we provide experimental evidence for a kinetic glass transition in the vortex matter of YBa2Cu3O7-δ with some disorder. This transition, whi...
-
Article
Unusual oxygen isotope effects in cuprates?
Arising from: G.-H. Gweon et al. Nature 430, 187–190 (2004)
-
Article
Observation of New Longitudinal and Transverse Josephson Plasma Modes in the Parallel Magnetic Fields: Underdoped YBCO
Josephson plasma reflectivity edge in YBa2Cu3O6.6 (T c=59 K) was measured in parallel magnetic fields H∥CuO2 up to 7 T. Upon application of the field, the Josephson plasma edge splits to two reflectivity edges, f...
-
Article
Incommensurate Dynamical Properties of Optimally Doped YBa2Cu3O6.9
The resonance and incommensurate peaks in optimally doped high-T c superconductor YBa2Cu3O6.9 are observed by means of TOF neutron scattering technique. Obtained overall dynamical properties in a wide Q-E space s...
-
Article
Crystal growth of Bi2Sr2Ca2Cu3O10+x and (Bi,Pb)2Sr2Ca2Cu3O10+x by the KCl flux method
Bi2Sr2Ca2Cu3O10+x and (Bi,Pb)2Sr2Ca2Cu3O10+x single crystals with a sharp superconducting transition at Tc = 109 K were grown using a modified KCl flux technique. The crystals show platelike morphology with typic...
-
Article
Kinetic study of (Bi,Pb)2Sr2Ca2Cu3O10+x phase formation in KCl flux
The kinetics of (Bi,Pb)2Sr2Ca2Cu3O10+x phase formation in KCl flux was studied, and kinetic analysis using the Avrami relation for isothermal phase transformation gave the Avrami exponent n = 2.5 at 855 °C for th...
-
Chapter and Conference Paper
Vortex Lattice Melting in Underdoped YBa2Cu4O8
Vortex lattice melting of YBa2Cu4O8 (Y124) crystals has been investigated by means of the bulk measurements. The vortex lattice softening as a precursor to the first-order melting transition can clearly be seen i...
-
Chapter and Conference Paper
Incommensurate Spin Fluctuations in YBCO — Charge and Spin Stripe Scenario —
A brief summary of the recent inelastic neutron scattering studies on spin dynamics of the superconducting YBCO is given. Spin fluctuations in CuO2 plane was experimentally shown to be of the incommensurate (IC) ...
-
Chapter and Conference Paper
Josephson Plasma Reflectivity Edge in Pb-doped Bi2212 Single Crystals: Direct Evidence for Reduced Anisotropy of Bi2212 by Pb-do**
We have successfully observed, for the first time, the Josephson plasma reflectivity edge of Bi-based high-T c cuprate using carrier overdoped Bi(Pb)2212 single crystal (T c = 65 K...
-
Chapter and Conference Paper
Resonant Raman Scattering in Twin-Free YBa2(Cu1-xZnx)3O7-δ Single Crystals
The Resonant Raman scattering spectra of twin-free YBa2(Cu1-xZnx)3O7-δ single crystals with optimal oxygen content have been investigated in a temperature range from 300 to l0K in the xx- and yy-polarizations. To...
-
Article
“Raman-Forbidden” Phonons in YBa2Cu3O7−x Crystals
We have thoroughly studied the additional modes in the phonon spectra of YBa 2 Cu 3 O 7−x single cr...
-
Article
Effects of Carbonate Defects on the Superconductivity of HgBa2CuO4+δ
Carbon contents inHgBa 2 CuO 4+δ andstarting materials (HgO, BaO, and CuO) for preparing it weredetermined by infrared spectroscopy...
-
Book and Conference Proceedings
-
Chapter and Conference Paper
Anisotropy of Underdoped YBa2Cu3O6.5 Single Crystal
The c-axis anisotropy of an underdoped YBa2Cu306.5 single crystal has been investigated by the torque magnetometry. The underdoped crystal shows a superconducting transition at 60 K. The torque was measured upon ...
-
Chapter and Conference Paper
Role of Intrinsic Pinning for Melting Transition of YBa2Cu3O6.93 in the Parallel Field to CuO2 Layers
Vortex lattice melting of an untwinned YBa2Cu3O6.93 single crystal has been investigated by means of the ac susceptibility and the torque. The crystal shows the vortex-lattice-melting transition in H||c configura...
-
Chapter and Conference Paper
Separation of Electronic and Phononic Components in Raman Spectra of High-Tc Superconductors
We demonstrate the inadequacy of the widely-used “standard Fano procedure” (deconvolution of a spectrum into a Fano profile and an incoherent background), and its main alternative, which is based on Green-func...
-
Chapter and Conference Paper
Behavior of “Forbidden” Modes in Raman Spectra of Underdoped YBa2Cu3O7-X
Polarized phononic Raman scattering spectra of underdoped YBa2Cu3O7-X (x=0.2-0.4) single crystals have been investigated as a function of the excitation laser wavelength and temperature. Besides five dominating A
