Vz. Kresin et Sa. Wolf, OBSERVATION OF A POSSIBLE OXYGEN-ISOTOPE EFFECT ON THE EFFECTIVE-MASSOF CARRIERS IN YBA2CU3O6.94 - COMMENT, Physical review. B, Condensed matter, 54(21), 1996, pp. 15543-15544
In a recent paper [Phys. Rev. B 51, 16 487 (1995)] Zhao and Morris arg
ued that the oxygen isotope substitution affects the value of the effe
ctive mass of the carrier, and such effect is manifested in the isotop
ic dependence of the penetration depth. The aim of this Comment is to
point out serious inconsistencies in their analysis and to clarify the
situation.