Origin of Hall Anomaly in the Mixed State

Details Origin of Hall Anomaly in the Mixed State Origin of Hall Anomaly in the Mixed State

1998-09-21

arxiv.org/abs/cond-mat/9809271v1

Physics

Condensed Matter

Revtex. A comment to D'Anna et al. PRL v.81, 2530 '98

Scientific paper

10.1103/PhysRevLett.82.2413

There has been a corporative absence of understanding of Hall anomaly data in the mixed state in terms of vortex many-body effect and pinning, because of the dominant theoretical influence. Now D'Anna et al. [ Phys. Rev. Lett. 81, 2530 (1998) (cond-mat/9808164)] are brave enough to announce the prominent role played by vortex many-body effect and pinning in their interpretation of their own data. Here I wish to point out: (1) Indeed the data of D'Anna et al. can be explained within an existing Hall anomaly theory based on vortex many-body considerations; (2) It is not surprising that their data are not consistent with available microscopic Hall anomaly theories, because those theories are mathematically incorrect; and (3) The courage of D'Anna et al. should be appreciated.

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