Understanding the Rule of Delta E = A/r^12 - B/r^6 in Physics Crystallography

Amr Reda
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what is the rule of delta E= A/r^12 _ B/r^6 ?
 
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Amr Reda said:
what is the rule of delta E= A/r^12 _ B/r^6 ?

That would appear to be the simple form of the Lennard-Jones potential.
 

Thread 'Stability of persistent currents in superconductors regardless of temperature'

From the BCS theory of superconductivity is well known that the superfluid density smoothly decreases with increasing temperature. Annihilated superfluid carriers become normal and lose their momenta on lattice atoms. So if we induce a persistent supercurrent in a ring below Tc and after that slowly increase the temperature, we must observe a decrease in the actual supercurrent, because the density of electron pairs and total supercurrent momentum decrease. However, this supercurrent...
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