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Title: Pressure-driven valence increase and metallization in the Kondo insulator Ce 3 Bi 4 Pt 3

Journal Article · · Physical Review B

We report the results of high pressure x-ray diffraction, x-ray absorption, and electrical transport measurements of Kondo insulator Ce3Bi4Pt3 up to 42 GPa, the highest pressure reached in the study of any Ce-based Kl. 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 energy gap and development of a semimetallic ground state. We also discuss potential ramifications of these results for the predicted topological KI state.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344; SC0014664; FA9550-14-1-0332; DMR-1905891; DMR-1609855; AC02-06CH11357
OSTI ID:
1592040
Alternate ID(s):
OSTI ID: 1606360
Report Number(s):
LLNL-JRNL-771815; PRBMDO; 963184; TRN: US2101985
Journal Information:
Physical Review B, Vol. 100, Issue 23; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

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