scholarly journals Identifying the dominant pairing interaction in high- Tc FeSe superconductors through Leggett modes

2018 ◽  
Vol 97 (14) ◽  
Author(s):  
Wen Huang ◽  
Manfred Sigrist ◽  
Zheng-Yu Weng
Keyword(s):  
Pairing Interaction ◽  
High Tc ◽  
Fese Superconductors

Possibility of phonon assisted electronic excitation for the pairing interaction in high Tc superconductors

1991 ◽  
Vol 185-189 ◽  
pp. 1065-1066 ◽  
Author(s):  
R. Aoki ◽  
K. Sakai ◽  
H. Murakami ◽  
T. Nakamura ◽  
H. Kawaji ◽  
...  
Keyword(s):  
Electronic Excitation ◽  
High Tc Superconductors ◽  
Pairing Interaction ◽  
High Tc

Theories of High Tc Superconductors

1987 ◽  
Vol 99 ◽  
Author(s):  
John Bardeen
Keyword(s):  
Low Temperatures ◽  
Landau Theory ◽  
3D Models ◽  
Oxide Superconductors ◽  
High Tc Superconductors ◽  
Pairing Interaction ◽  
Ginzburg Landau ◽  
High Tc ◽  
Wide Range ◽  
High Transition

ABSTRACTMany theories have been given to account for the high transition temperatures in the oxide superconductors. While most are based on pairing, they differ as to the origin of the attractive interaction that gives rise to the pairs and whether the pairing is weak or strong. If weak(λ < ∼ 0.5), the energy range of the pairing interaction must be wider than is consistent with one mediated solely by phonons. With measurements on single crystals becoming available, giving data covering a wide range of frequencies and temperatures, it is possible to narrow down the possible options. The data show that anisotropie 3D models are required. Observed isotope shifts indicate that phonons must play a role, but additional mechanisms are likely necessary to account for the high T's. Thermal, magnetic and transport data are consistent with anisotropie Ginzburg-Landau theory near T, with expected departures at low temperatures.

ON THE HIGH-TC SUPERCONDUCTIVITY WITH PHONON-MEDIATED PAIRING INTERACTION

APPC 2000 ◽  
2001 ◽  
Author(s):  
NGUYEN VAN HOA ◽  
HOANG ANH TUAN ◽  
NGUYEN TOAN THANG
Keyword(s):  
Pairing Interaction ◽  
High Tc ◽  
High Tc Superconductivity

Pairing Interaction in the Hole-Doped High-Tc Superconductors

1998 ◽  
Vol 12 (29n31) ◽  
pp. 2954-2957
Author(s):  
Sung-Ho Suck Salk
Keyword(s):  
Phase Diagram ◽  
Scattering Theory ◽  
Hole Doping ◽  
High Tc Superconductors ◽  
Pairing Interaction ◽  
High Tc ◽  
Positively Charged ◽  
Singlet Pair

A scenario for the possibility of hole-pairing is introduced on the basis of the phase diagram involving the spingap phase and the superconducting order for high-T c superconductors. Using our earlier generalized scattering theory, a theory of hole-pairing is proposed by allowing interaction between the negatively charged singlet pair and the positively charged holes as a result of hole doping.

scholarly journals Electronic Origin of the Inhomogeneous Pairing Interaction in the High-Tc Superconductor Bi2Sr2CaCu2O8+ 

Science ◽  
2008 ◽  
Vol 320 (5873) ◽  
pp. 196-201 ◽  
Author(s):  
A. N. Pasupathy ◽  
A. Pushp ◽  
K. K. Gomes ◽  
C. V. Parker ◽  
J. Wen ◽  
...  
Keyword(s):  
Pairing Interaction ◽  
High Tc ◽  
High Tc Superconductor

scholarly journals A determination of the pairing interaction in the high Tc cuprate superconductor Tl2Ba2CaCu2O8 (Tl2212)

2007 ◽  
Vol 460-462 ◽  
pp. 40-43 ◽  
Author(s):  
W.A. Little ◽  
M.J. Holcomb ◽  
G. Ghiringhelli ◽  
L. Braicovich ◽  
C. Dallera ◽  
...  
Keyword(s):  
Cuprate Superconductor ◽  
Pairing Interaction ◽  
High Tc

scholarly journals Reservoir Layers in High Tc Mercury Cuprates

1999 ◽  
Vol 574 ◽  
Author(s):  
T. H. Geballe ◽  
Boris Y. Moyzhes ◽  
P. H. Dicktnson
Keyword(s):  
Effective Mass ◽  
Cuprate Superconductors ◽  
Single Site ◽  
Pairing Interaction ◽  
High Tc ◽  
Wave Symmetry ◽  
Mercury Cuprates ◽  
Hg Cuprates ◽  
D Wave ◽  
Phase Differences

AbstractWe put forward the hypothesis that cations with 6s electrons (Hg,Tl,Pb,Bi) in the charge reservoir layers of high Tc cuprate superconductors actively participate in the pairing interaction as negative-U centers. We further argue that the Hg-cuprates are outstanding superconductors (Tc > 160 K) because they can exist as two-ion negative-U centers, . Their electrons are less localized than in single-site centers (negative-U or bipolaron) and can have a strong pairing interaction with a smaller increase in effective mass. The centers are oriented in the x and y directions and can have phase differences compatible with the d-wave symmetry of the CuO2 planes.

scholarly journals How to pin down the pairing interaction for high Tc superconductivity in cuprates

2018 ◽  
Vol 32 (17) ◽  
pp. 1840026 ◽  
Author(s):  
Han-Yong Choi ◽  
Jin Mo Bok
Keyword(s):  
Frequency Dependence ◽  
Momentum Distribution ◽  
Emission Spectroscopy ◽  
Cuprate Superconductors ◽  
Theoretical Calculations ◽  
The Self ◽  
Pairing Interaction ◽  
High Tc ◽  
High Tc Superconductivity ◽  
Arpes Data

The normal and pairing self-energies are the microscopic quantities which reflect and characterize the underlying interaction in superconductors. The momentum and frequency dependence of the self-energies, therefore, provides the experimental criteria which can single out the long sought-after pairing interaction among many proposed ideas. This line of research to pin down the pairing interaction for the cuprate superconductors has been carried out with some success by analyzing the momentum distribution curves (MDCs) of laser angle-resolved photo-emission spectroscopy (ARPES) data. Some progress and results are presented and compared with theoretical calculations based on leading proposals. Comments are made on the proposed scenarios from the comparisons.

Mirror Nesting and High TC Superconductivity

2003 ◽  
Vol 17 (18n20) ◽  
pp. 3262-3265 ◽  
Author(s):  
V. I. Belyavsky ◽  
V. V. Kapaev ◽  
Yu. V. Kopaev
Keyword(s):  
Kinetic Energy ◽  
Relative Motion ◽  
Interaction Strength ◽  
Necessary Condition ◽  
Pairing Interaction ◽  
High Tc ◽  
High Tc Superconductivity ◽  
Fermi Contour ◽  
Superconducting Pairing ◽  
Electron Dispersion

The necessary condition of superconducting pairing with large total pair momentum is mirror nesting that is a rise of pair Fermi contour due to matching of some pieces of the Fermi contour and an isoline of the pair-relative-motion kinetic energy. Such a condition may be satisfied, at definite total pair momenta, due to a special feature of electron dispersion. In the case of perfect mirror nesting a rise of the superconducting ordering turns out to be possible up to arbitrary small value of the pairing interaction strength.

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