Equation of the Magnetic Threshold Curve of a Superconductor

G. Preston Burns

doi:10.1103/PhysRev.76.999.2

$TABLE I. Values of BT312 ill cm3 degree3/2/mole. T(K) He3 HOe 0.51 - 44.7 -388 1.02 -177.5 -401 2.04 -333.1 -477 3.07 -422.5 -543 4.09 -484.7 -592 5.11 -524.8 -625 6.13 -555.0 -644 7.15 -575.7 -654 The general expression for the second virial coefficient in quantum theory is:', B _ 3 N_2J(21+1)>q(k) exp - T)kdk 2 r 2 ;mc T 0 ' K T + ( h2 \ Nt I t2 ) . k7m K T n a 1)16 rT The first term corresponds to the states of relative motion with positive energies E= h2k2/m, k being the wave number, I the angular momentum quantum number and the phase fl1(k) being connected with the asymptotic behavior of the eigenfunction l'k, 1(r) corresponding to the state 1, k. The second term gives the contribution of the stationary states of discrete negative energies. The influence of the statistics, i.e. of the symmetry character of the wave functions, is reflected firstly in the last term which is positive for He3 (F. D. statistics) and negative for He4 (B. E. statistics), and secondly in the fact that the summations must be carried out only over odd values of I in the case$

Equation of the Magnetic Threshold Curve of a Superconductor

Burns, G. Preston

Follow Physical Review , Volume 76 (7) American Physical Society (APS) – Oct 1, 1949