Abstract
We report the results of high-pressure X-ray diffraction, X-ray absorption, and electrical transport measurements of the Kondo insulator (KI) Ce3Bi4Pt3 up to 42 GPa, the highest pressure reached in the study of any Ce-based KI. We observe a smooth decrease in volume and movement toward intermediate Ce valence with pressure, both of which point to increased electron correlations. Despite this, temperature-dependent resistance data show the suppression of the interaction-driven ambient pressure insulating ground state. We also discuss potential ramifications of these results for the predicted topological KI state.
| Original language | English |
|---|---|
| Article number | 235133 |
| Journal | Physical Review B |
| Volume | 100 |
| Issue number | 23 |
| DOIs | |
| State | Published - Dec 23 2019 |
Funding
We thank Ryan Stillwell and Sam Weir for assistance with DAC preparation. Portions of this work were supported by LDRD under Project No. 18-SI-001 and under the auspices of the US Department of Energy (DOE) by Lawrence Livermore National Laboratory under Contract No. DE-AC52-07NA27344. Further, this material is based upon work supported by the US DOE, Office of Science, Office of Workforce Development for Teachers and Scientists, Office of Science Graduate Student Research (SCGSR) program. The SCGSR program is administered by the Oak Ridge Institute for Science and Education for the DOE under Contract No. DESC0014664. This work was also supported by Air Force Office of Scientific Research Award No. FA9550-14-1-0332, National Science Foundation Division of Materials Research Awards No. DMR-1905891 and No. DMR-1609855, and the Gordon and Betty Moore Foundation's EPiQS Initiative through Grant No. GBMF4419. Portions of this work were performed at HPCAT (Sector 16), Advanced Photon Source, Argonne National Laboratory. HPCAT operations are supported by DOE-NNSA's Office of Experimental Sciences. The Advanced Photon Source is a DOE Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.