A historical/epistemological account of the foundation of the key ideas supporting chemical equilibrium theory

2018 ◽  
Vol 21 (2) ◽  
pp. 221-252 ◽  
Author(s):  
Juan Quílez
Keyword(s):  
Chemical Equilibrium ◽  
Equilibrium Theory

scholarly journals Quasi-Chemical Equilibrium Theory, Part II

1958 ◽  
Vol 20 (4) ◽  
pp. 553-575 ◽  
Author(s):  
J. M. Blatt ◽  
Takeo Matsubara
Keyword(s):  
Chemical Equilibrium ◽  
Equilibrium Theory

PRESSURE DEPENDENCE OF Tc FROM CHEMICAL EQUILIBRIUM

1999 ◽  
Vol 13 (29n31) ◽  
pp. 3532-3537 ◽  
Author(s):  
A. KALLIO ◽  
J. HISSA ◽  
T. HÄYRYNEN ◽  
V. BRÄYSY
Keyword(s):  
Transition Temperature ◽  
Equilibrium Constant ◽  
Pressure Dependence ◽  
Normal State ◽  
Chemical Equilibrium ◽  
Pressure Range ◽  
Equilibrium Theory ◽  
Starting Point ◽  
To Come ◽  
Two Parameter

Chemical equilibrium theory analogous with dissociation of molecules or ionization of gas of atoms is applied to high-Tc superconductors. The starting point are preformed pairs, which exist in the normal state and can be treated as Coulomb bosons with charge 2e. Above Tc the pairs (B++) decay into fermions (h+) according to the equilibrium reaction B++⇌2h+. Using an approximate chemical equilibrium constant, proportional to pressure we derive a universal two-parameter expression for the pressurized optimum transition temperature [Formula: see text]. The formula shows that [Formula: see text] developes a maximum and beyond the maximum it starts to come down. We also show that in interesting pressure range P>10 GPa, the expansion in powers of pressure diverges.

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