  The results of experimental study of interference induced magnetoconductivity
in narrow quantum well HgTe with the normal energy spectrum are presented.
Analysis is performed with taking into account the conductivity anisotropy. It
is shown that the fitting parameter \tau_\phi corresponding to the phase
relaxation time increases in magnitude with the increasing conductivity
(\sigma) and decreasing temperature following the 1/T law. Such a behavior is
analogous to that observed in usual two-dimensional systems with simple energy
spectrum and corresponds to the inelasticity of electron-electron interaction
as the main mechanism of the phase relaxation. However, it drastically differs
from that observed in the wide HgTe quantum wells with the inverted spectrum,
in which \tau_\phi being obtained by the same way is practically independent of
\sigma. It is presumed that a different structure of the electron
multicomponent wave function for the inverted and normal quantum wells could be
reason for such a discrepancy.
