Abstract
The integrated Berry curvature is a geometric property that has dramatic implications for material properties. This study investigates the integrated Berry curvature and other contributions to the anomalous Hall effect in CrGeTe3 as a function of pressure. The anomalous Hall effect is absent in the insulating phase of CrGeTe3 and evolves with pressure in a domelike fashion as pressure is applied. The dome's edges are characterized by Fermi surface deformations, manifested as mixed electron and hole transport. We corroborate the presence of bipolar transport using ab initio calculations, which also predict a nonmonotonic behavior of the Berry curvature as a function of pressure. Quantitative discrepancies between our calculations and experimental results indicate that additional scattering mechanisms, which are also strongly tuned by pressure, contribute to the anomalous Hall effect in CrGeTe3.
| Original language | English |
|---|---|
| Article number | 013127 |
| Journal | Physical Review Research |
| Volume | 7 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2025 |
| Externally published | Yes |
Funding
A.R. acknowledges support from the Zuckerman Foundation and the Israel Science Foundation (Grant No. 1017/20). S.D.W., B.R.O., and P.S. gratefully acknowledge support via the UC Santa Barbara NSF Quantum Foundry funded via the Q-AMASE-i program under Award No. DMR-1906325. G.Kh.R. acknowledges the Israel Science Foundation (Grants No. 1748/20). T.H. acknowledges financial support by the European Research Council (ERC) under grant QuantumCUSP (Grant Agreement No. 101077020). H.O.J. acknowledges support through JSPS KAKENHI Grant No. 24H01668. G.S. thanks Shay Sandik, Itai Silber, and Gal Tuvia for the help with the cryogenic equipment. G.S. acknowledges support from the Israeli Clore fellowship. Part of the computation in this work has been done using the facilities of the Supercomputer Center, the Institute for Solid State Physics, the University of Tokyo. A. Ron and G. Scharf thank the Tel Aviv University Center for Light Matter Interaction for their support.