Electronic topological transitions in cadmium under pressure studied via theoretical and experimental x-ray absorption spectroscopy
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Nevada, Las Vegas, NV (United States); University of Nevada, Las Vegas
- University of Nevada, Las Vegas, NV (United States)
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); University of Nevada, Las Vegas, NV (United States)
- Argonne National Laboratory (ANL), Argonne, IL (United States)
Here, an electronic topological transition (ETT) in cadmium below 1 GPa is investigated in situ with experimental x-ray absorption spectroscopy and projecting calculated core-valence excitons onto the band structure. These projections are a useful application of the Bethe-Salpeter equation approach that considers many-body effects. The method described herein can be used for systems that are otherwise difficult to probe in situ; therefore, it provides a generalizable approach to identifying and understanding ETTs under high pressure. Although pressure-induced ETTs are often probed using indirect structural responses, our own x-ray diffraction and Raman studies suggest a second-order structural transition around 3 GPa but are largely insensitive to or inconclusive for the previously studied ETT in this region.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); University of Nevada, Las Vegas, NV (United States)
- Sponsoring Organization:
- DE-SC-0023355; NERSC; National Science Foundation (NSF); USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division (CSGB); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
- Grant/Contract Number:
- 89233218CNA000001; AC02-05CH11231; AC02-06CH11357; AC05-00OR22725; SC0020303; SC0023355; SC0023431
- OSTI ID:
- 2476397
- Report Number(s):
- LA-UR--24-23789
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 20 Vol. 110; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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