Pressure Effects on the 4 f Electronic Structure of Light Lanthanides

摘要: Using the satellite structure of Lγ_{1} line in nonresonant x-ray emission spectra, we probe high-pressure evolution bare 4f signature early light lanthanides at ambient temperature. For Ce and Pr 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 codes for Pr, also Nd, which does not exhibit VC. Our work suggests that changes to occupation more consistently associated than is moment. Indeed, show case Ce, mixing higher angular momentum state, driven increased hybridization, acts obscure expected reduction. measurements emphasize importance unified study full set microscopic observables obtain most discerning test underlying, fundamental f-electron phenomena high pressures.