Tuning Spin Hall Angles by Alloying
| Autor: | T. N. G. Meier, M. Haertinger, Diemo Ködderitzsch, Sebastian Wimmer, Martin Obstbaum, Hubert Ebert, Christian H. Back, A. K. Greitner, Kristina Chadova, M. Kronseder, Martin Decker |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Physics
Condensed matter physics Alloy ddc:530 General Physics and Astronomy Sigma 02 engineering and technology Conductivity engineering.material 021001 nanoscience & nanotechnology 530 Physik 01 natural sciences Hall conductivity TORQUES FORMULA Transverse plane Formalism (philosophy of mathematics) 0103 physical sciences engineering 010306 general physics 0210 nano-technology Angle alpha |
| Popis: | Within a combined experimental and theoretical study it is shown that the spin Hall angle of a substitutional alloy system can be continuously varied via its composition. For the alloy system AuxPt1-x a substantial increase of the maximum spin Hall angle compared to the pure alloy partners could be achieved this way. The experimental findings for the longitudinal charge conductivity sigma, the transverse spin Hall conductivity sigma(SH), and the spin Hall angle alpha(SH) could be confirmed by calculations based on Kubo's linear response formalism. Calculations of these response quantities for different temperatures show that the divergent behavior of sigma and sigma(SH) is rapidly suppressed with increasing temperature. As a consequence, sigma(SH) is dominated at higher temperatures by its intrinsic contribution that has only a rather weak temperature dependence. |
| Databáze: | OpenAIRE |
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