[en] We have examined the deviation from linearity of the temperature dependence of the electrical resistivity of a YBaCuO ceramics. We have observed at high temperature a crossover behavior toward a logarithmic temperature dependence at lower temperature. It seems relevant to attribute the origin of such a term to a pair breaking mechanism contribution, thus to give a lower bound to the existence of superconductivity fluctuations onset temperature. Our findings also implies that carriers are bosons above T(c).
Disciplines :
Physics
Author, co-author :
Ausloos, Marcel ; Université de Liège - ULiège > Département de physique > Département de physique
Gillet, François ; Université de Liège - ULiège > Département des sciences de la vie > Génétique
Enz C.P. Z. Phys. B — Condensed Matter 1990, 80:317.
Bednorz J.C., Muller K.A. Z. Phys. B — Condensed Matter 1986, 64:189.
Lawrence W.E., Doniach S. Proc. XII Int. Conf. Low Temperature Physics. Kyoto, 1970 , E., Kanda, Keigakij, Tokyo; 1971, 361.
Aslamazov L.G., Larkin A.I. Fiz. Tverd. Tela 1968, 10:875.
Maki K. (1968) The Critical Fluctuation of the Order Parameter in Type-II Superconductors. Progress of Theoretical Physics 39:897.
Thompson R.S. Phys. Rev. B 1970, 1:327.
Enomoto Y., Suzuki M., Murakami T., Inukai T., Inamura T. Jpn. J. Appl. Phys. 1981, 20:1661.
Politis C., Geerk J., Dietrich M., Obst B., Luo H.L. Z. Phys. B — Condensed Matter 1987, 66:279.
Freitas P.P., Tsuei C.C., Plaskett T.S. Phys. Rev. B 1987, 36:833.
Vidal F., Veira J.S., Maza J., Garcia-Alvarado F., Moran E., Alario M.A. J. Phys. C 1988, 21:L599.
Ausloos M., Laurent Phys. Rev. B 1988, 37:611.
Ausloos M., Laurent, Patapis S.K., Green S.M., Luo H.L., Politis C. (1988) EVIDENCE FOR ANOMALOUS FLUCTUATIONS IN SUPERCONDUCTING Bi1.75Pb0.25Ca2Sr2Cu3O10. Modern Physics Letters B 2:1319.
Ausloos M., Laurent, Patapis S.K., Politis C., Luo H.L., Godelaine P.A., Gillet F., Dang A., Cloots R. Z. Phys. B — Condensed Matter 1991, 83:355.
Ausloos M. J. Phys. A 1989, 22:593.
Ausloos M., Clippe P., Laurent Solid State Commun. 1990, 73:137.
Cantelli G., Cantelli R., Cordero F., Costa G.A., Ferretti M., Olcese G.L. (1988) Phase Transformation at 240 K in YBa2Cu3O7-x by Measurements of Elastic Energy Dissipation and Modulus and its Possible Relation with the Enhancement of Tc Above 100 K. Europhysics Letters (EPL) 6:271.
Laegreid F., Fossheim K., Sandvold E., Julsrud S. Nature 1987, 330:637.
.
Tozer S.W., Kleinasser A.W., Penney T., Kaizer D., Holtzberg F. Phys. Rev. Lett. 1987, 59:1768.
Oh B., Char K., Kent A.D., Naito M., Beasley M.R., Geballe T.H., Hammond R.H., Kapitulnik A., Graybeal J.M. Phys. Rev. B 1988, 37:7861.
