Linear electron-hole-electron pair model of high-temperature superconductivity in La2-xMxCuO4 and LBa2Cu3O7-y. Small Cooper pair formation in linear Cu2+-O-Cu3+-O-Cu2+ units via concerted breathing-mode vibration

1988 ◽  
Vol 27 (14) ◽  
pp. 2394-2396 ◽  
Author(s):  
Myung Hwan Whangbo ◽  
Enric Canadell ◽  
Michel Evain ◽  
Jack M. Williams
Keyword(s):  
High Temperature ◽  
Cooper Pair ◽  
Electron Pair ◽  
High Temperature Superconductivity ◽  
Pair Formation ◽  
Linear Electron ◽  
Electron Hole ◽  
Breathing Mode ◽  
Pair Model ◽  
Mode Vibration

scholarly journals Cooper Pair Formation in U(1) Gauge Theory of High Temperature Superconductivity

2001 ◽  
Vol 70 (2) ◽  
pp. 509-512
Author(s):  
Atsuya Kumagai ◽  
Masahiko Hayashi ◽  
Hiromichi Ebisawa
Keyword(s):  
High Temperature ◽  
Gauge Theory ◽  
Cooper Pair ◽  
High Temperature Superconductivity ◽  
Pair Formation

scholarly journals GINZBURG–LANDAU LIKE THEORY OF HIGH TEMPERATURE SUPERCONDUCTIVITY IN THE CUPRATES: EMERGENT d-WAVE ORDER

2012 ◽  
Vol 26 (10) ◽  
pp. 1230005
Author(s):  
T. V. RAMAKRISHNAN
Keyword(s):  
High Temperature ◽  
Cooper Pair ◽  
Nearest Neighbor ◽  
High Temperature Superconductivity ◽  
Transition Curve ◽  
Hole Doping ◽  
Positive Interaction ◽  
Long Wavelength ◽  
Spin Singlet ◽  
D Wave

High temperature superconductivity in the cuprates remains one of the most widely investigated, constantly surprising and poorly understood phenomena in physics. Here, we describe briefly a new phenomenological theory inspired by the celebrated description of superconductivity due to Ginzburg and Landau and believed to describe its essence. This posits a free energy functional for the superconductor in terms of a complex order parameter characterizing it. We propose that there is, for superconducting cuprates, a similar functional of the complex, in plane, nearest neighbor spin singlet bond (or Cooper) pair amplitude ψij. Further, we suggest that a crucial part of it is a (short range) positive interaction between nearest neighbor bond pairs, of strength J′. Such an interaction leads to nonzero long wavelength phase stiffness or superconductive long range order, with the observed d-wave symmetry, below a temperature Tc~z J′ where z is the number of nearest neighbors; d-wave superconductivity is thus an emergent, collective consequence. Using the functional, we calculate a large range of properties, e.g., the pseudogap transition temperature T* as a function of hole doping x, the transition curve Tc(x), the superfluid stiffness ρs(x, T), the specific heat (without and with a magnetic field) due to the fluctuating pair degrees of freedom and the zero temperature vortex structure. We find remarkable agreement with experiment. We also calculate the self-energy of electrons hopping on the square cuprate lattice and coupled to electrons of nearly opposite momenta via inevitable long wavelength Cooper pair fluctuations formed of these electrons. The ensuing results for electron spectral density are successfully compared with recent experimental results for angle resolved photo emission spectroscopy (ARPES), and comprehensively explain strange features such as temperature dependent Fermi arcs above Tc and the "bending" of the superconducting gap below Tc.

Arguments for a lone-pair model for high temperature superconductivity

1988 ◽  
Vol 153-155 ◽  
pp. 1195-1196
Author(s):  
Istva´n Po´csik ◽  
Endel Lippmaa
Keyword(s):  
High Temperature ◽  
High Temperature Superconductivity ◽  
Lone Pair ◽  
Pair Model

scholarly journals Brief communication: Electron pair donors and Earth's energy generation

2018 ◽  
Author(s):  
Frederick Mayer
Keyword(s):  
Nuclear Reaction ◽  
Thermal Energy ◽  
Cooper Pair ◽  
Electron Pair ◽  
Energy Generation ◽  
Pair Formation ◽  
Electron Donors ◽  
Model Calculations ◽  
The Earth ◽  
Reaction Chain

Abstract. This Brief Communication presents a series of model calculations for the electron pair donor densities required for tresino thermal energy generation in the Earth. The crucial density of electron donors is determined from the ratio of He3 and He4 after many years starting from initial densities of the donor pairs. In addition, a new proposal is introduced that connects Cooper pair formations to the deuteron tresino nuclear reaction chain (the chain that determines the He3 / He4 ratio). Furthermore, it is proposed that magnetotelluric (MT) observations may be connected to Cooper pair formation either with or without substantial heating.

scholarly journals The phonon-quadrupole mechanism of superconducting pair formation in high-temperature superconductivity

2005 ◽  
Vol 26 (4) ◽  
Author(s):  
А.П. Шпак ◽  
А.С. Литовченко ◽  
О.А. Калініченко
Keyword(s):  
High Temperature ◽  
High Temperature Superconductivity ◽  
Pair Formation
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