ausblenden:
Schlagwörter:
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Zusammenfassung:
We report the results of a study of the Hall effect and
magnetoresistance in single crystals of Sr2RuO4 in which Sr2+ has been
substituted by La3+ (Sr2-yLayRuO4) or Ru4+ by Ti4+ (Sr2Ru1-xTixO4). For
undoped Sr2RuO4, the purity is so high that the strong-field Hall
coefficient can be measured for fields above 4 T. The conventional
weak-field Hall coefficient as a function of doping shows a sharp jump
and sign change at ysimilar to0.01 that is unrelated to either a sharp
change in Fermi-surface topography or a magnetic instability. The
implications of these results are discussed.
