Electron-hole compensation effect between topologically trivial electrons and nontrivial holes in NbAs
Via angular Shubnikov-de Haas (SdH) quantum oscillations measurements, we determine the Fermi surface topology of NbAs, a Weyl semimetal candidate. The SdH oscillations consist of two frequencies corresponding to two Fermi surface extrema: 20.8 T ( alpha pocket) and 15.6 T ( beta pocket). The analys...
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| Veröffentlicht in: | Physical review. B 2015-11, Vol.92 (20), Article 205134 |
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| container_title | Physical review. B |
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| creator | Luo, Yongkang Ghimire, N. J. Wartenbe, M. Choi, Hongchul Neupane, M. McDonald, R. D. Bauer, E. D. Zhu, Jianxin Thompson, J. D. Ronning, F. |
| description | Via angular Shubnikov-de Haas (SdH) quantum oscillations measurements, we determine the Fermi surface topology of NbAs, a Weyl semimetal candidate. The SdH oscillations consist of two frequencies corresponding to two Fermi surface extrema: 20.8 T ( alpha pocket) and 15.6 T ( beta pocket). The analysis, including a Landau fan plot, shows that the beta pocket has a Berry phase of [Pi] and a small effective mass of ~0.033m0, indicative of a nontrivial topology in momentum space, whereas the alpha pocket has a trivial Berry phase of 0 and a heavier effective mass of ~0.066m0. From the effective mass and the beta -pocket frequency, we determine that the Weyl node is 110.5 meV from the chemical potential. An electron-hole compensation effect is discussed in this system, and its impact on magnetotransport properties is addressed. The difference between NbAs and other monopnictide Weyl semimetals is also discussed. |
| doi_str_mv | 10.1103/PhysRevB.92.205134 |
| format | Article |
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The analysis, including a Landau fan plot, shows that the beta pocket has a Berry phase of [Pi] and a small effective mass of ~0.033m0, indicative of a nontrivial topology in momentum space, whereas the alpha pocket has a trivial Berry phase of 0 and a heavier effective mass of ~0.066m0. From the effective mass and the beta -pocket frequency, we determine that the Weyl node is 110.5 meV from the chemical potential. An electron-hole compensation effect is discussed in this system, and its impact on magnetotransport properties is addressed. 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B</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Luo, Yongkang</au><au>Ghimire, N. J.</au><au>Wartenbe, M.</au><au>Choi, Hongchul</au><au>Neupane, M.</au><au>McDonald, R. D.</au><au>Bauer, E. D.</au><au>Zhu, Jianxin</au><au>Thompson, J. D.</au><au>Ronning, F.</au><aucorp>Los Alamos National Lab. (LANL), Los Alamos, NM (United States)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electron-hole compensation effect between topologically trivial electrons and nontrivial holes in NbAs</atitle><jtitle>Physical review. B</jtitle><date>2015-11-30</date><risdate>2015</risdate><volume>92</volume><issue>20</issue><artnum>205134</artnum><issn>1098-0121</issn><issn>2469-9950</issn><eissn>1550-235X</eissn><eissn>2469-9969</eissn><abstract>Via angular Shubnikov-de Haas (SdH) quantum oscillations measurements, we determine the Fermi surface topology of NbAs, a Weyl semimetal candidate. The SdH oscillations consist of two frequencies corresponding to two Fermi surface extrema: 20.8 T ( alpha pocket) and 15.6 T ( beta pocket). The analysis, including a Landau fan plot, shows that the beta pocket has a Berry phase of [Pi] and a small effective mass of ~0.033m0, indicative of a nontrivial topology in momentum space, whereas the alpha pocket has a trivial Berry phase of 0 and a heavier effective mass of ~0.066m0. From the effective mass and the beta -pocket frequency, we determine that the Weyl node is 110.5 meV from the chemical potential. 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| subjects | Berries Compensation Condensed matter CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY Fermi surfaces MATERIALS SCIENCE Metalloids Oscillations Topology |
| title | Electron-hole compensation effect between topologically trivial electrons and nontrivial holes in NbAs |
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