Superfluidity of 3He in dilute 3He-4He mixtures

Weak3He Pairing in3He-He(II) Mixtures

“…These are comparable to the results of [12,36,37]. The fact remains that so far there has been no experimental evidence to the formation of a more ordered state in the system below some critical temperature [34,38,39].…”

“…Therefore the instability of our system exists thanks to the Kohn-Luttinger mechanism at x > 3% [10,35]. The triplet transition temperature T (p) c can be calculated using [12]:…”

“…This involved calculating the contributions of third-and fourth-order diagrams in the gas phase and taking into account retardation effects. Estimates of the superfluid transition temperature for 3 He in 3 He-He(II) range from 10 −5 -10 −4 K for singlet pairing at low x, and 10 −10 -10 −4 K for triplet pairing at higher x [10][11][12][13]. However, no experimental evidence has yet been found for such a transition.…”

Bound states of3He in3He-4He mixture films

“…An experimentalist could face an extra Kosterlitz-Thouless phase transition, liquefaction of ( 3 He) 2 or polymerization of 3 He, crossover from a Bose gas of dimers to a 2D Fermi fluid (with strong pair correlation) upon increasing the 3 He concentration, etc. [8,9,33,34,35,36]. The dimer binding energy is a cornerstone characteristic of all these phenomena which are exciting objectives for experimental and theoretical studies.…”

Fermi-gas approach to the problem of superfluidity in three- and two- dimensional solutions of ³He in ⁴He

“…В обзоре Башкина и Остгарда [7] приведены экспери ментальные данные групп Побелла [49] и Огавы [50]. Они говорят об отсутствии сверхтекучего перехода в трех мерных растворах вплоть до температуры 0,2 мК при 1; 5 и 6,4%.…”