%0 Journal Article %1 PhysRevB.100.085111 %A Wuttke, Christoph %A Caglieris, Federico %A Sykora, Steffen %A Scaravaggi, Francesco %A Wolter, Anja U. B. %A Manna, Kaustuv %A Süss, Vicky %A Shekhar, Chandra %A Felser, Claudia %A Büchner, Bernd %A Hess, Christian %D 2019 %I American Physical Society %J Phys. Rev. B %K b %N 8 %P 085111 %R 10.1103/PhysRevB.100.085111 %T Berry curvature unravelled by the anomalous Nernst effect in Mn$_3$Ge %U https://link.aps.org/doi/10.1103/PhysRevB.100.085111 %V 100 %X The discovery of topological quantum materials represents a striking innovation in modern condensed matter physics with remarkable fundamental and technological implications. Their classification has been recently extended to topological Weyl semimetals, i.e., solid-state systems which exhibit the elusive Weyl fermions as low-energy excitations. Here we show that the Nernst effect can be exploited as a sensitive probe for determining key parameters of the Weyl physics, applying it to the noncollinear antiferromagnet Mn3Ge. This compound exhibits anomalous thermoelectric transport due to enhanced Berry curvature from Weyl points located extremely close to the Fermi level. We establish from our data a direct measure of the Berry curvature at the Fermi level and, using a minimal model of a Weyl semimetal, extract the Weyl point energy and their distance in momentum space.

@article{PhysRevB.100.085111, abstract = {The discovery of topological quantum materials represents a striking innovation in modern condensed matter physics with remarkable fundamental and technological implications. Their classification has been recently extended to topological Weyl semimetals, i.e., solid-state systems which exhibit the elusive Weyl fermions as low-energy excitations. Here we show that the Nernst effect can be exploited as a sensitive probe for determining key parameters of the Weyl physics, applying it to the noncollinear antiferromagnet Mn3Ge. This compound exhibits anomalous thermoelectric transport due to enhanced Berry curvature from Weyl points located extremely close to the Fermi level. We establish from our data a direct measure of the Berry curvature at the Fermi level and, using a minimal model of a Weyl semimetal, extract the Weyl point energy and their distance in momentum space.}, added-at = {2019-09-26T12:07:35.000+0200}, author = {Wuttke, Christoph and Caglieris, Federico and Sykora, Steffen and Scaravaggi, Francesco and Wolter, Anja U. B. and Manna, Kaustuv and S\"uss, Vicky and Shekhar, Chandra and Felser, Claudia and B\"uchner, Bernd and Hess, Christian}, biburl = {https://www.bibsonomy.org/bibtex/246c705ed2576729dafa62bc638798f68/ctqmat}, day = 05, doi = {10.1103/PhysRevB.100.085111}, interhash = {64cb2ec66eac5a6d0c974ce13c5ce81a}, intrahash = {46c705ed2576729dafa62bc638798f68}, journal = {Phys. Rev. B}, keywords = {b}, month = {08}, number = 8, numpages = {10}, pages = 085111, publisher = {American Physical Society}, timestamp = {2023-10-19T15:44:35.000+0200}, title = {Berry curvature unravelled by the anomalous Nernst effect in Mn$_{\mathbf{3}}$Ge}, url = {https://link.aps.org/doi/10.1103/PhysRevB.100.085111}, volume = 100, year = 2019 }