This theory explains why a threshold quantity for its validity is inversely proportional to the mass of the (*) isotope used to construct the central material.
One result of this theory states that spin susceptibility will decrease exponentially with temperature, though transition metals deviate significantly from that prediction. Strong evidence for this theory includes its ability to predict the heat capacity of vanadium in a certain temperature range. This theory explains why a threshold quantity for its validity is inversely proportional to the mass of the (*) isotope used to construct the central material. This theory relies on the fact that two particles with half-integer spins, when combined, have an integer spin and will behave like a boson, not having to satisfy the Pauli exclusion principle. It posits that interactions with phonons will cause duplets of electrons to form Cooper pairs at low temperatures. For 10 points, identify this triply eponymous microscopic theory that successfully describes Type I superconductivity.
One result of this theory states that spin susceptibility will decrease exponentially with temperature, though transition metals deviate significantly from that prediction.
BCS theory [or Bardeen-Cooper-Schrieffer theory]