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J Phys Condens Matter. 2019 Mar 14. doi: 10.1088/1361-648X/ab0fdd. [Epub ahead of print]

Theoretical investigation of Hall sign change in SrRuO<sub>3</sub>.

Author information

1
Department of Applied Physics, Kaohsiung National University, No 700 Kaohsiung University Road, Nan-Tzu District, Kaohsiung 811, Taiwan, Kaohsiung, TAIWAN.
2
Department of Physics and Center for Nanoscience and Nanotechnology, National Sun Yat-sen University, Kaohsiung, Kaohsiung, Kaohsiung, 80424, TAIWAN.
3
Department of Physics, National Sun Yat-Sen University, Kaohsiung, TAIWAN.

Abstract

The appearance of Hall sign change in perovskite SrRuO$_3$ thin films at Curie temperature was confirmed from our fabricated samples and the result was simulated by our proposed theoretical model. In particular, our simulation results are consistent with experimental results mainly due to the introduction of an impurity band in a two-band model. We found the other important factors in our theory responsible for observed consistency Hall measurements are the itinerant carrier density and its intrinsic carrier type. Eventually the theory possibly interprets the mechanism of Hall sign change.

KEYWORDS:

Hall effect; perovskite ferromagnet; two-band model

PMID:
30870821
DOI:
10.1088/1361-648X/ab0fdd

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