High-resolution ARPES study of many-body interactions in high-Tc cuprate superconductors

2007 ◽  
Vol 460-462 ◽  
pp. 198-201 ◽  
Author(s):  
Takashi Takahashi
Keyword(s):  
High Resolution ◽  
Cuprate Superconductors ◽  
Many Body ◽  
High Tc ◽  
Many Body Interactions

Many-body interactions in hole-doped high-Tc cuprates studied by high-resolution ARPES

2008 ◽  
Vol 69 (12) ◽  
pp. 2949-2955
Author(s):  
T. Sato ◽  
K. Terashima ◽  
K. Nakayama ◽  
T. Arakane ◽  
H. Matsui ◽  
...  
Keyword(s):  
High Resolution ◽  
Many Body ◽  
High Tc ◽  
Many Body Interactions ◽  
High Tc Cuprates

scholarly journals Energy band and spin-dependent many-body interactions in ferromagnetic Ni(110): A high-resolution angle-resolved photoemission study

2005 ◽  
Vol 72 (21) ◽  
Author(s):  
Mitsuharu Higashiguchi ◽  
Kenya Shimada ◽  
Keisuke Nishiura ◽  
Xiaoyu Cui ◽  
Hirofumi Namatame ◽  
...  
Keyword(s):  
High Resolution ◽  
Energy Band ◽  
Many Body ◽  
Photoemission Study ◽  
Many Body Interactions

scholarly journals Analytical Descriptions of High-Tc Cuprates by Introducing Rotating Holes and a New Model to Handle Many-Body Interactions

2020 ◽  
Author(s):  
Shinichi Ishiguri
Keyword(s):  
Metal Phase ◽  
Field Energy ◽  
Many Body ◽  
Critical Temperatures ◽  
High Tc ◽  
New Model ◽  
Magnetic Field Energy ◽  
Statistic Model ◽  
Many Body Interactions ◽  
High Tc Cuprates

This paper describes all the properties of high-Tc cuprates by introducing rotating holes which are created by angular momentum conservations on a two dimensional CuO2 surface, and which have a different mass from that of a normal hole due to the magnetic field energy induced by the rotation. This new particle called a macroscopic boson describes doping dependences of pseudo gap temperature and the transition temperature at which an anomaly metal phase appears. In addition, it also describes all the properties of the anomaly metal phase, using findings from our previous article [1] . Furthermore, the present paper introduces a new model to handle many-body interactions, which results in a new statistic equation. A partition function of macroscopic bosons describes all the properties of the anomaly metal phase, which sufficiently agrees with experiments. Moreover, the above-mentioned statistic equation describing many-body interactions accurately explains why high-Tc cuprates have significantly high critical temperatures, which indicates that the source of the characteristic stems from pseudo gap energy. By introducing a macroscopic boson and the new statistic model for many-body interactions, the present paper uncovered the mystery of high-Tc cuprates, which have been a challenge for many researchers. Moreover, in the present paper, pure analytical calculations are conducted. These calculations agree with experimental data which do not employ numerical calculations or fitting methods but employ many actual physical constants.

scholarly journals Lattice Dynamics of the High Tc Superconductor ErBa2Cu3O7

1994 ◽  
Vol 47 (1) ◽  
pp. 103 ◽  
Author(s):  
S Mohan ◽  
R Kannan
Keyword(s):  
Lattice Dynamics ◽  
Many Body ◽  
New Approach ◽  
High Tc ◽  
High Tc Superconductor ◽  
Zone Centre ◽  
Three Body ◽  
Many Body Interactions ◽  
Good Agreement ◽  
Infrared Data

The lattice dynamics of the high Tc superconductor ErBa2Cu307 have been investigated in detail with a modified three-body force shell model. The model accounts for the effect of many-body interactions in the lattice potential. The aim of the present work is to treat the various interactions between the ions in generalised way without making them numerically equal. The values of the phonon frequencies calculated at the zone centre by this new approach are in good agreement with the available Raman and infrared data.

scholarly journals Analytical Descriptions of High Tc Cuprates by Introducing Rotating Holes and a New Model to Handle Many-Body Interactions

2020 ◽  
Author(s):  
Shinichi Ishiguri
Keyword(s):  
Metal Phase ◽  
Field Energy ◽  
Many Body ◽  
Critical Temperatures ◽  
High Tc ◽  
New Model ◽  
Magnetic Field Energy ◽  
Many Body Interactions ◽  
The Magnetic Field ◽  
High Tc Cuprates

This study describes all the properties of high Tc cuprates by introducing rotating holes that are created by angular momentum conservations on a 2D CuO2 surface, and which have a different mass from that of a normal hole because of the magnetic field energy induced by the rotation. This new particle called a macroscopic Boson describes the doping dependences of pseudo-gap temperature and the transition temperature at which an anomaly metal phase appears and describes the origin of the pseudo-gap. Furthermore, this study introduces a new model to handle many-body interactions, which results in a new statistic equation. This statistic equation describing many-body interactions accurately explains why high Tc cuprates have significantly high critical temperatures. Moreover a partition function of macroscopic Bosons describes all the properties of anomaly metal phase, which sufficiently agree with experiments, using the result from our previous study [1] that analytically describes the doping dependence of Tc. By introducing a macroscopic Boson and the new statistical model for many-body interactions, this study uncovered the mystery of high Tc cuprates, which have been a challenge for many researchers. An important point is that, in this study, pure analytical calculations are consistently conducted, which agree with experimental data well (i.e., they do not use numerical calculations or fitting methods but use many actual physical constants).

High resolution STEM imaging study on high Tc superconductor YBa2CuaO7-x

1988 ◽  
Vol 46 ◽  
pp. 882-883
Author(s):  
H.-J. Ou ◽  
J. M. Cowley
Keyword(s):  
Crystal Structure ◽  
High Resolution ◽  
Grain Boundary ◽  
Strong Field ◽  
Imaging Study ◽  
Structure Defects ◽  
High Tc ◽  
High Tc Superconductor ◽  
Diffraction Patterns ◽  
Lattice Planes

Using the dedicate VG-HB5 STEM microscope, the crystal structure of high Tc superconductor of YBa2Cu3O7-x has been studied via high resolution STEM (HRSTEM) imaging and nanobeam (∽3A) diffraction patterns. Figure 1(a) and 2(a) illustrate the HRSTEM image taken at 10' times magnification along [001] direction and [100] direction, respectively. In figure 1(a), a grain boundary with strong field contrast is seen between two crystal regions A and B. The grain boundary appears to be parallel to a (110) plane, although it is not possible to determine [100] and [001] axes as it is in other regions which contain twin planes [3]. Following the horizontal lattice lines, from left to right across the grain boundary, a lattice bending of ∽4° is noticed. Three extra lattice planes, indicated by arrows, were found to terminate at the grain boundary and form dislocations. It is believed that due to different chemical composition, such structure defects occur during crystal growth. No bending is observed along the vertical lattice lines.

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