by VESCOVO, E, BRAICOVICH, L, DEMICHELIS, B, FASANA, A and EGGENHOFFNER, R, IANDELLI, A, OLCESE, GL and PALENZONA, A
Abstract:
We present photoemission results with uv and with x rays from a family of pseudobinary compounds obtained by partial substitution of Yb, with Ca or Sc, in the reference compound YbAl2. The substitution with Ca gives rise to a decompression and the one with Sc a compression of the lattice. Ultraviolet photoemission shows the perturbation of the electron states due to chemical substitution; Sc introduces a d character extending up to about 3 eV below the Fermi level. The weights of the Yb3+ and Yb2+ multiplets given by x-ray photoemission are compared with the results from x-ray absorption; the two spectroscopies agree in YbAl2 while the relative weights Yb3+ versus Yb2+ from x-ray photoemission are definitely below the x-ray-absorption values in the compounds heavily substituted with Sc; this is interpreted as a photoemission final-state effect connected with the d character introduced by the substitution.
Reference:
PHOTOEMISSION-SPECTROSCOPY INVESTIGATION OF THE CHEMICAL-PRESSURE EFFECT IN YB1-XMXAL2 (M = CA,SC) (VESCOVO, E, BRAICOVICH, L, DEMICHELIS, B, FASANA, A and EGGENHOFFNER, R, IANDELLI, A, OLCESE, GL and PALENZONA, A), In PHYSICAL REVIEW B, AMERICAN PHYSICAL SOC, volume 43, 1991.
Bibtex Entry:
@article{ ISI:A1991FM82300012, Author = {VESCOVO, E and BRAICOVICH, L and DEMICHELIS, B and FASANA, A and EGGENHOFFNER, R and IANDELLI, A and OLCESE, GL and PALENZONA, A}, Title = {{PHOTOEMISSION-SPECTROSCOPY INVESTIGATION OF THE CHEMICAL-PRESSURE EFFECT IN YB1-XMXAL2 (M = CA,SC)}}, Journal = {{PHYSICAL REVIEW B}}, Year = {{1991}}, Volume = {{43}}, Number = {{15}}, Pages = {{12281-12288}}, Month = {{MAY 15}}, Abstract = {{We present photoemission results with uv and with x rays from a family of pseudobinary compounds obtained by partial substitution of Yb, with Ca or Sc, in the reference compound YbAl2. The substitution with Ca gives rise to a decompression and the one with Sc a compression of the lattice. Ultraviolet photoemission shows the perturbation of the electron states due to chemical substitution; Sc introduces a d character extending up to about 3 eV below the Fermi level. The weights of the Yb3+ and Yb2+ multiplets given by x-ray photoemission are compared with the results from x-ray absorption; the two spectroscopies agree in YbAl2 while the relative weights Yb3+ versus Yb2+ from x-ray photoemission are definitely below the x-ray-absorption values in the compounds heavily substituted with Sc; this is interpreted as a photoemission final-state effect connected with the d character introduced by the substitution.}}, Publisher = {{AMERICAN PHYSICAL SOC}}, Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}}, Type = {{Article}}, Language = {{English}}, Affiliation = {{VESCOVO, E (Corresponding Author), POLITECN MILAN,IST FIS,PIAZZA LEONARDO DAVINCI 32,I-20133 MILAN,ITALY. UNIV GENOA,IST CHIM PHYS,I-16126 GENOA,ITALY. UNIV GENOA,DIPARTMENTO FIS,I-16126 GENOA,ITALY.}}, DOI = {{10.1103/PhysRevB.43.12281}}, ISSN = {{0163-1829}}, Keywords-Plus = {{RAY ABSORPTION-SPECTROSCOPY; RARE-EARTH SYSTEMS; ELECTRONIC-STRUCTURE; PSEUDOBINARY ALLOYS; VALENCE CHANGE; YBAL2; SUSCEPTIBILITY; FLUCTUATION; PARAMETERS; SURFACE}}, Research-Areas = {{Materials Science; Physics}}, Web-of-Science-Categories = {{Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter}}, ORCID-Numbers = {{Braicovich, Lucio/0000-0001-6548-9140}}, Number-of-Cited-References = {{33}}, Times-Cited = {{4}}, Usage-Count-Last-180-days = {{0}}, Usage-Count-Since-2013 = {{4}}, Journal-ISO = {{Phys. Rev. B}}, Doc-Delivery-Number = {{FM823}}, Unique-ID = {{ISI:A1991FM82300012}}, DA = {{2020-12-22}}, }
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