Low-Temperature Hall Effect in Substituted Sr2RuO4

A.P. Mackenzie; C. Bergemann; N. Kikugawa; Y. Maeno

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Low-Temperature Hall Effect in Substituted Sr2RuO4

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arxiv cond-mat/0408312 v1 pith:N5T3QGBB submitted 2004-08-13 cond-mat.str-el cond-mat.supr-con

Low-Temperature Hall Effect in Substituted Sr2RuO4

N. Kikugawa , A.P. Mackenzie , C. Bergemann , Y. Maeno This is my paper

classification cond-mat.str-el cond-mat.supr-con

keywords hallsr2ruo4changecoefficienteffectresultssharpsubstituted

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We report the results of a study of the Hall effect and magnetoresistance in single crystals of Sr2RuO4 in which Sr^(2+) has been substituted by La^(3+) (Sr(2-y)La(y)RuO(4)) or Ru^(4+) by Ti^(4+) (Sr(2)Ru(1-x)Ti(x)O(4)). 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 y ~ 0.01 that is unrelated to either a sharp change in Fermi-surface topography or a magnetic instability. The implications of these results are discussed.

Low-Temperature Hall Effect in Substituted Sr2RuO4

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