Pressure Effects on the 4f Electronic Structure of Light Lanthanides

W.-T. Chiu, D. R. Mortensen, M. J. Lipp, G. Resta, C. J. Jia, B. Moritz, T. P. Devereaux, S. Y. Savrasov, G. T. Seidler, and R. T. Scalettar
Phys. Rev. Lett. 122, 066401 – Published 13 February 2019
PDFHTMLExport Citation

Abstract

Using the satellite structure of the Lγ1 line in nonresonant x-ray emission spectra, we probe the high-pressure evolution of the bare 4f signature of the early light lanthanides at ambient temperature. For Ce and Pr the satellite peak experiences a sudden reduction concurrent with their respective volume collapse (VC) transitions. These new experimental results are supported by calculations using state-of-the-art extended atomic structure codes for Ce and Pr, and also for Nd, which does not exhibit a VC. Our work suggests that changes to the 4f occupation are more consistently associated with evolution of the satellite than is the reduction of the 4f moment. Indeed, we show that in the case of Ce, mixing of a higher atomic angular momentum state, driven by the increased hybridization, acts to obscure the expected satellite reduction. These measurements emphasize the importance of a unified study of a full set of microscopic observables to obtain the most discerning test of the underlying, fundamental f-electron phenomena at high pressures.

  • Figure
  • Figure
  • Figure
  • Received 1 December 2018

DOI:https://doi.org/10.1103/PhysRevLett.122.066401

© 2019 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

W.-T. Chiu1, D. R. Mortensen2, M. J. Lipp3, G. Resta1, C. J. Jia4, B. Moritz4, T. P. Devereaux4,5,6, S. Y. Savrasov1, G. T. Seidler2, and R. T. Scalettar1

  • 1Physics Department, University of California, Davis, California 95616, USA
  • 2Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA
  • 3Physics Division, Lawrence Livermore National Laboratory, Livermore, California 94550, USA
  • 4Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
  • 5Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
  • 6Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA

Article Text (Subscription Required)

Click to Expand

Supplemental Material (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 122, Iss. 6 — 15 February 2019

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×