Temperature-invariant photoelectron spectra in cerium heavy-fermion compounds : inconsistencies with the Kondo model
4f levels in Ce heavy-fermion compounds (CeSi sub 2 , CeBe sub 13 , CeSb sub 2 , CeAl sub 3 ) are examined using resonant photoemission. The following inconsistencies with the predictions of the Kondo model were found: all temperature dependence can be accounted for simply by phonon broadening and t...
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| Veröffentlicht in: | Physical review letters 1992-01, Vol.68 (2), p.236-239 |
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| container_title | Physical review letters |
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| creator | JOYCE, J. J ARKO, A. J LAWRENCE, J CANFIELD, P. C FISK, Z BARTLETT, R. J THOMPSON, J. D |
| description | 4f levels in Ce heavy-fermion compounds (CeSi sub 2 , CeBe sub 13 , CeSb sub 2 , CeAl sub 3 ) are examined using resonant photoemission. The following inconsistencies with the predictions of the Kondo model were found: all temperature dependence can be accounted for simply by phonon broadening and the Fermi function; the spectral weights of the features near E sub F do not scale with T sub K ; and the line shape of the feature previously identified as the Kondo resonance is Lorentzian and about an order of magnitude broader than predictions. Instrument resolution is not a limiting factor. |
| doi_str_mv | 10.1103/PhysRevLett.68.236 |
| format | Article |
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The following inconsistencies with the predictions of the Kondo model were found: all temperature dependence can be accounted for simply by phonon broadening and the Fermi function; the spectral weights of the features near E sub F do not scale with T sub K ; and the line shape of the feature previously identified as the Kondo resonance is Lorentzian and about an order of magnitude broader than predictions. 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D</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Temperature-invariant photoelectron spectra in cerium heavy-fermion compounds : inconsistencies with the Kondo model</atitle><jtitle>Physical review letters</jtitle><addtitle>Phys Rev Lett</addtitle><date>1992-01-13</date><risdate>1992</risdate><volume>68</volume><issue>2</issue><spage>236</spage><epage>239</epage><pages>236-239</pages><issn>0031-9007</issn><eissn>1079-7114</eissn><coden>PRLTAO</coden><abstract>4f levels in Ce heavy-fermion compounds (CeSi sub 2 , CeBe sub 13 , CeSb sub 2 , CeAl sub 3 ) are examined using resonant photoemission. The following inconsistencies with the predictions of the Kondo model were found: all temperature dependence can be accounted for simply by phonon broadening and the Fermi function; the spectral weights of the features near E sub F do not scale with T sub K ; and the line shape of the feature previously identified as the Kondo resonance is Lorentzian and about an order of magnitude broader than predictions. Instrument resolution is not a limiting factor.</abstract><cop>Ridge, NY</cop><pub>American Physical Society</pub><pmid>10045570</pmid><doi>10.1103/PhysRevLett.68.236</doi><tpages>4</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Physical review letters, 1992-01, Vol.68 (2), p.236-239 |
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| source | American Physical Society Journals |
| subjects | CERIUM COMPOUNDS COMPARATIVE EVALUATIONS Condensed matter: electronic structure, electrical, magnetic, and optical properties ELECTRON SPECTROSCOPY Electron states ENERGY LEVELS EVALUATION Exact sciences and technology FERMI LEVEL KONDO EFFECT MATERIALS SCIENCE Narrow-band systems intermediate-valence solids PHONONS PHOTOELECTRON SPECTROSCOPY Physics QUASI PARTICLES RARE EARTH COMPOUNDS SPECTROSCOPY 360606 -- Other Materials-- Physical Properties-- (1992-) TEMPERATURE DEPENDENCE |
| title | Temperature-invariant photoelectron spectra in cerium heavy-fermion compounds : inconsistencies with the Kondo model |
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