Download PDF by Yuki Shiomi: Anomalous and Topological Hall Effects in Itinerant Magnets

By Yuki Shiomi

ISBN-10: 4431543600

ISBN-13: 9784431543602

ISBN-10: 4431543619

ISBN-13: 9784431543619

This e-book offers an research of the anomalous and topological corridor results in a few itinerant ferromagnets and helimagnets by means of measurements of corridor results pushed by way of electric or warmth present. New clarifications are supplied for spin-dependent corridor results triggered by way of the Berry section, skew scattering, and scalar spin chirality.

The writer finds the scattering-free nature of the Berry-phase-induced anomalous corridor present by means of carrying out the 1st comparative examine of electric and thermal corridor results. The impurity-element dependence of the anomalous corridor impact attributable to skew scattering is systematically investigated within the low-resistivity quarter for Fe. new examples displaying a topological corridor impact are present in helimagnets, during which nonzero scalar spin chirality arises from the modulation of spin constitution via Dzyaloshinsky–Moriya (DM) interplay. this type of DM-interaction-mediated topological corridor influence is a brand new kind of topological corridor influence. additionally the temperature dependence of topological corridor phrases within the thermal corridor impact and Nernst–Ettingshausen impression is located to be completely different from that during corridor effect.

These effects should be helpful for functions of spin present to units with low strength consumption.

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B. J. I. Shraiman, P. Majumdar, Z. Tesanovic, Phys. Rev. Lett. 83, 3737 (1999) 14. S. Onoda, N. Sugimoto, N. Nagaosa, Phys. Rev. Lett. 97, 126602 (2006) 15. J. Weischenberg, F. Freimuth, J. Sinova, S. Blügel, Y. Mokrousov, Phys. Rev. Lett. 107, 106601 (2011) 16. T. Miyasato, N. Abe, T. Fujii, A. Asamitsu, S. Onoda, Y. Onose, N. Nagaosa, Y. Tokura. Phys. Rev. Lett. 99, 086602 (2007) 17. M. Luttinger, Phys. Rev. 112, 739 (1958) 18. S. Onoda, N. Sugimoto, N. Nagaosa, Phy. Rev. B 77, 165103 (2008) 19.

Krishana, R. Gagnon, L. Taillefer, Phys. Rev. Lett. 84, 2219 (2000) 7. D. Xiao, Y. Yao, Z. Fang, Q. Niu, Pys. Rev. Lett. 97, 026603 (2006) 8. I. Y. J. Beenakker, Phys. Rev. B 84, 035133 (2011) Chapter 3 Scattering-Free Nature of Intrinsic Anomalous Hall Current Abstract First, we investigate the intrinsic AHE which is related with Berry-phase. In contrast to the extrinsic mechanisms, an intrinsic AHE induced by the Berry phase is, in principle, not affected by the scattering. Experimentally, the relation that ρ yx ∝ ρx2x (namely, Hall conductivity σx y = ρ yx /ρx2x is independent of ρx x ) is identified in some materials and is thought to be the evidence of the dissipationless nature of anomalous Hall current (C.

Rev. B 81, 041203(R) (2010). 79. Z. Yu, Y. Onose, N. H. H. Han, Y. Matsui, N. Nagaosa, Y. Tokura, Nature 465, 901 (2010) 80. Z. Yu, N. Kanazawa, Y. Onose, K. Z. Zhang, S. Ishiwata, Y. Matui, Y. Tokura, Nature Mater. 10, 106 (2010) 81. M. Onoda, G. Tatara, N. Nagaosa, J. Phys. Soc. Jpn. 73, 2624 (2004) Chapter 2 Sample Preparation and Measurement Methods Abstract In this chapter, the methods of sample preparation and measurements are presented. The relation among the Hall, thermal Hall, and Nernst effects will be explained in terms of the Boltzmann equation.

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Anomalous and Topological Hall Effects in Itinerant Magnets by Yuki Shiomi

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