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Journal article
Unconventional magnetoresistance and electronic transition in Mn3Ge Weyl semimetal
Physical review. B, v 106(19), 195114
15 Nov 2022
Abstract
Weyl semimetals are well known for their anomalous transport effects caused by a large fictitious magnetic field generated by the nonzero Berry curvature. We performed the analysis of the electrical transport measure-ments of the magnetic Weyl semimetal Mn3Ge in the a-b and a-c planes. We have observed negative longitudinal magnetoresistance (LMR) at a low magnetic field (B < 1.5 T) along all the axes. The high-field LMR shows different behavior along the x and z axes. A similar trend has been observed in the case of planar Hall effect (PHE) measurements as well. The nature of high-field LMR along the x axis changes near 200 K. The dominant carrier concentration type and metallic to semimetallic transition also occur near 200 K. These observations suggest two main conclusions: (i) the high-field LMR in Mn3Ge is driven by the metallic-semimetallic nature of the compound and (ii) Mn3Ge compound goes through an electronic band topological transition near 200 K. Single-crystal neutron diffraction does not show any change in the magnetic structure below 300 K. However, the in-plane lattice parameter (a) shows a maximum near 230 K. Therefore it is possible that the change in electronic band structure near 200 K is driven by the a lattice parameter of the compound.
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Details
- Title
- Unconventional magnetoresistance and electronic transition in Mn3Ge Weyl semimetal
- Creators
- V. Rai - Forschungszentrum JülichS. Jana - Forschungszentrum JülichM. Meven - RWTH Aachen UniversityR. Dutta - RWTH Aachen UniversityJ. Persson - Forschungszentrum JülichS. Nandi - Forschungszentrum Jülich
- Publication Details
- Physical review. B, v 106(19), 195114
- Publisher
- Amer Physical Soc
- Number of pages
- 15
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000885043600007
- Scopus ID
- 2-s2.0-85141917785
- Other Identifier
- 991022004202604721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary
- Physics, Applied
- Physics, Condensed Matter