Magnetotransport in Sr3PbO antiperovskite
| Autor: | Andreas W. Rost, H. Takagi, Juergen Nuss, Claus Mühle, S. Suetsugu, K. Hayama, Kentaro Kitagawa, J. H. Kim |
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| Rok vydání: | 2018 |
| Předmět: |
Physics
Magnetoresistance Condensed matter physics Model system 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Magnetic field Antiperovskite Family member Dirac electron Electrical resistivity and conductivity 0103 physical sciences Low density 010306 general physics 0210 nano-technology |
| Zdroj: | Physical Review B. 98 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.98.115203 |
| Popis: | Novel topological phenomena are anticipated for three-dimensional (3D) Dirac electrons. The magnetotransport properties of cubic ${\mathrm{Sr}}_{3}\mathrm{PbO}$ antiperovskite, theoretically proposed to be a 3D massive Dirac electron system, are studied. The measurements of Shubnikov--de Haas oscillations and Hall resistivity indicate the presence of a low density ($\ensuremath{\sim}1\ifmmode\times\else\texttimes\fi{}{10}^{18}\phantom{\rule{0.16em}{0ex}}{\mathrm{cm}}^{\ensuremath{-}3}$) of holes with an extremely small cyclotron mass of $0.01--0.06{m}_{e}$. The magnetoresistance $\mathrm{\ensuremath{\Delta}}{\ensuremath{\rho}}_{xx}(B)$ is linear in magnetic field $B$ with the magnitude independent of temperature. These results are fully consistent with the presence of 3D massive Dirac electrons in ${\mathrm{Sr}}_{3}\mathrm{PbO}$. The chemical flexibility of the antiperovskites and our findings in the family member ${\mathrm{Sr}}_{3}\mathrm{PbO}$ point to their potential as a model system in which to explore exotic topological phases. |
| Databáze: | OpenAIRE |
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