An. Tarasov, THE ORDER-PARAMETER EQUATIONS OF SUPERFLU ID FERMI-LIQUID WITH SPIN-TRIPLET PAIRING NEAR T-C IN MAGNETIC-FIELD, Fizika nizkih temperatur, 21(1), 1995, pp. 24-37
This article is devoted to description of equilibrium properties of su
perfluid phases of(3)He in magnetic field at temperatures near the nor
mal-superfluid point T-c. the Landau Fermi-liquid (F-L) approach gener
alized to superfluid Fermi-liquids (SFLs) is used. Equations for the o
rder parameter paramagnetic SFL with spin-triplet pairing in static an
d uniform (DC) moderately strong magnetic field are derived without ta
king into account strong-coupling (SC) effects. An integro-differentia
l equation is deduced for the order parameter in the general case of s
pin-triplet pairing (spin of a pair is s=1, orbital moment l of a pair
is any odd number). It is valid in the approximation of small space i
nhomogeneities of the SFL for external DC magnetic field at temperatur
es near T-c. In the case of spin-triplet p-wave pairing a Ginzburg-Lan
dau (GL) equation is derived for the order parameter A(aj) (complex 3x
3 matrix). Corrections to the coefficients in the GL eq. are resulted
from taking into account the influence of moderately strong DC magneti
c field and spin-excahnge F-L interaction by the theory of permutation
s. In such fields these corrections can be of the same order of magnit
ude as the so-called <<nontrivial>> SC corrections to the GL eq. (or e
ven exceed them) and are much higher than the particle-hole asymmetric
contribution. The above corrections are connected with the deformatio
n of the order parameter in moderate magnetic fields and are of intere
st at description of(3)He-B at low pressures.