Specific intermediate-valence state of insulating 4f compounds detected by L3 x-ray absorption
The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4...
Ausführliche Beschreibung
Gespeichert in:
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E-Artikel |
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| Erschienen: |
1987 |
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Online-Ressource 7 |
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APS Digital Backfile Archive 1893-2003 |
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Enthalten in: Physical review / B - College Park, Md. : APS, 1970, 35(1987), 2, Seite 806-812 |
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volume:35 ; year:1987 ; number:2 ; pages:806-812 ; extent:7 |
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| 520 | |a The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4H2O, which have similar local structure but different crystal structure. We show that L3 XANES final states are a direct probe of configuration interaction between 4fn and 4fn+1L configurations in the ground state and that the weight of the 4fn+1L in the ground state can be deduced. The many-body final states arise from the characteristic properties of these materials: (i) the presence of localized 4f level above the oxygen 2p band separated by a gap δɛ with relevant correlation energy Uff (Uff≥δɛ) and (ii) mixing of 4f localized states with ligand valence orbitals such that the hybridization energy V is of the same order of magnitude as the energy separation ΔE between the many-body configuration 4fn and 4fn+1L (V≥ΔE). These insulating materials, which cannot be classified as standard mixed-valence systems, are called here interatomic intermediate-valence systems. | ||
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(DE-627)NLEJ24942004X (DE-601)aps:fd4fca2f6d5f629f12dc85075a99ef59077809b9 DE-627 ger DE-627 rakwb Specific intermediate-valence state of insulating 4f compounds detected by L3 x-ray absorption 1987 Online-Ressource 7 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4H2O, which have similar local structure but different crystal structure. We show that L3 XANES final states are a direct probe of configuration interaction between 4fn and 4fn+1L configurations in the ground state and that the weight of the 4fn+1L in the ground state can be deduced. The many-body final states arise from the characteristic properties of these materials: (i) the presence of localized 4f level above the oxygen 2p band separated by a gap δɛ with relevant correlation energy Uff (Uff≥δɛ) and (ii) mixing of 4f localized states with ligand valence orbitals such that the hybridization energy V is of the same order of magnitude as the energy separation ΔE between the many-body configuration 4fn and 4fn+1L (V≥ΔE). These insulating materials, which cannot be classified as standard mixed-valence systems, are called here interatomic intermediate-valence systems. APS Digital Backfile Archive 1893-2003 Bianconi, A. oth Marcelli, A. oth Enthalten in Physical review / B College Park, Md. : APS, 1970 35(1987), 2, Seite 806-812 Online-Ressource (DE-627)NLEJ248237845 (DE-600)1473011-X 1550-235X nnns volume:35 year:1987 number:2 pages:806-812 extent:7 https://www.tib.eu/de/suchen/id/aps%3Afd4fca2f6d5f629f12dc85075a99ef59077809b9 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 35 1987 2 806-812 7 |
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(DE-627)NLEJ24942004X (DE-601)aps:fd4fca2f6d5f629f12dc85075a99ef59077809b9 DE-627 ger DE-627 rakwb Specific intermediate-valence state of insulating 4f compounds detected by L3 x-ray absorption 1987 Online-Ressource 7 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4H2O, which have similar local structure but different crystal structure. We show that L3 XANES final states are a direct probe of configuration interaction between 4fn and 4fn+1L configurations in the ground state and that the weight of the 4fn+1L in the ground state can be deduced. The many-body final states arise from the characteristic properties of these materials: (i) the presence of localized 4f level above the oxygen 2p band separated by a gap δɛ with relevant correlation energy Uff (Uff≥δɛ) and (ii) mixing of 4f localized states with ligand valence orbitals such that the hybridization energy V is of the same order of magnitude as the energy separation ΔE between the many-body configuration 4fn and 4fn+1L (V≥ΔE). These insulating materials, which cannot be classified as standard mixed-valence systems, are called here interatomic intermediate-valence systems. APS Digital Backfile Archive 1893-2003 Bianconi, A. oth Marcelli, A. oth Enthalten in Physical review / B College Park, Md. : APS, 1970 35(1987), 2, Seite 806-812 Online-Ressource (DE-627)NLEJ248237845 (DE-600)1473011-X 1550-235X nnns volume:35 year:1987 number:2 pages:806-812 extent:7 https://www.tib.eu/de/suchen/id/aps%3Afd4fca2f6d5f629f12dc85075a99ef59077809b9 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 35 1987 2 806-812 7 |
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(DE-627)NLEJ24942004X (DE-601)aps:fd4fca2f6d5f629f12dc85075a99ef59077809b9 DE-627 ger DE-627 rakwb Specific intermediate-valence state of insulating 4f compounds detected by L3 x-ray absorption 1987 Online-Ressource 7 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4H2O, which have similar local structure but different crystal structure. We show that L3 XANES final states are a direct probe of configuration interaction between 4fn and 4fn+1L configurations in the ground state and that the weight of the 4fn+1L in the ground state can be deduced. The many-body final states arise from the characteristic properties of these materials: (i) the presence of localized 4f level above the oxygen 2p band separated by a gap δɛ with relevant correlation energy Uff (Uff≥δɛ) and (ii) mixing of 4f localized states with ligand valence orbitals such that the hybridization energy V is of the same order of magnitude as the energy separation ΔE between the many-body configuration 4fn and 4fn+1L (V≥ΔE). These insulating materials, which cannot be classified as standard mixed-valence systems, are called here interatomic intermediate-valence systems. APS Digital Backfile Archive 1893-2003 Bianconi, A. oth Marcelli, A. oth Enthalten in Physical review / B College Park, Md. : APS, 1970 35(1987), 2, Seite 806-812 Online-Ressource (DE-627)NLEJ248237845 (DE-600)1473011-X 1550-235X nnns volume:35 year:1987 number:2 pages:806-812 extent:7 https://www.tib.eu/de/suchen/id/aps%3Afd4fca2f6d5f629f12dc85075a99ef59077809b9 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 35 1987 2 806-812 7 |
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(DE-627)NLEJ24942004X (DE-601)aps:fd4fca2f6d5f629f12dc85075a99ef59077809b9 DE-627 ger DE-627 rakwb Specific intermediate-valence state of insulating 4f compounds detected by L3 x-ray absorption 1987 Online-Ressource 7 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4H2O, which have similar local structure but different crystal structure. We show that L3 XANES final states are a direct probe of configuration interaction between 4fn and 4fn+1L configurations in the ground state and that the weight of the 4fn+1L in the ground state can be deduced. The many-body final states arise from the characteristic properties of these materials: (i) the presence of localized 4f level above the oxygen 2p band separated by a gap δɛ with relevant correlation energy Uff (Uff≥δɛ) and (ii) mixing of 4f localized states with ligand valence orbitals such that the hybridization energy V is of the same order of magnitude as the energy separation ΔE between the many-body configuration 4fn and 4fn+1L (V≥ΔE). These insulating materials, which cannot be classified as standard mixed-valence systems, are called here interatomic intermediate-valence systems. APS Digital Backfile Archive 1893-2003 Bianconi, A. oth Marcelli, A. oth Enthalten in Physical review / B College Park, Md. : APS, 1970 35(1987), 2, Seite 806-812 Online-Ressource (DE-627)NLEJ248237845 (DE-600)1473011-X 1550-235X nnns volume:35 year:1987 number:2 pages:806-812 extent:7 https://www.tib.eu/de/suchen/id/aps%3Afd4fca2f6d5f629f12dc85075a99ef59077809b9 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 35 1987 2 806-812 7 |
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(DE-627)NLEJ24942004X (DE-601)aps:fd4fca2f6d5f629f12dc85075a99ef59077809b9 DE-627 ger DE-627 rakwb Specific intermediate-valence state of insulating 4f compounds detected by L3 x-ray absorption 1987 Online-Ressource 7 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4H2O, which have similar local structure but different crystal structure. We show that L3 XANES final states are a direct probe of configuration interaction between 4fn and 4fn+1L configurations in the ground state and that the weight of the 4fn+1L in the ground state can be deduced. The many-body final states arise from the characteristic properties of these materials: (i) the presence of localized 4f level above the oxygen 2p band separated by a gap δɛ with relevant correlation energy Uff (Uff≥δɛ) and (ii) mixing of 4f localized states with ligand valence orbitals such that the hybridization energy V is of the same order of magnitude as the energy separation ΔE between the many-body configuration 4fn and 4fn+1L (V≥ΔE). These insulating materials, which cannot be classified as standard mixed-valence systems, are called here interatomic intermediate-valence systems. APS Digital Backfile Archive 1893-2003 Bianconi, A. oth Marcelli, A. oth Enthalten in Physical review / B College Park, Md. : APS, 1970 35(1987), 2, Seite 806-812 Online-Ressource (DE-627)NLEJ248237845 (DE-600)1473011-X 1550-235X nnns volume:35 year:1987 number:2 pages:806-812 extent:7 https://www.tib.eu/de/suchen/id/aps%3Afd4fca2f6d5f629f12dc85075a99ef59077809b9 Verlag Deutschlandweit zugänglich GBV_USEFLAG_U ZDB-1-APS GBV_NL_ARTICLE AR 35 1987 2 806-812 7 |
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specific intermediate-valence state of insulating 4f compounds detected by l3 x-ray absorption |
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Specific intermediate-valence state of insulating 4f compounds detected by L3 x-ray absorption |
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The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4H2O, which have similar local structure but different crystal structure. We show that L3 XANES final states are a direct probe of configuration interaction between 4fn and 4fn+1L configurations in the ground state and that the weight of the 4fn+1L in the ground state can be deduced. The many-body final states arise from the characteristic properties of these materials: (i) the presence of localized 4f level above the oxygen 2p band separated by a gap δɛ with relevant correlation energy Uff (Uff≥δɛ) and (ii) mixing of 4f localized states with ligand valence orbitals such that the hybridization energy V is of the same order of magnitude as the energy separation ΔE between the many-body configuration 4fn and 4fn+1L (V≥ΔE). These insulating materials, which cannot be classified as standard mixed-valence systems, are called here interatomic intermediate-valence systems. |
| abstractGer |
The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4H2O, which have similar local structure but different crystal structure. We show that L3 XANES final states are a direct probe of configuration interaction between 4fn and 4fn+1L configurations in the ground state and that the weight of the 4fn+1L in the ground state can be deduced. The many-body final states arise from the characteristic properties of these materials: (i) the presence of localized 4f level above the oxygen 2p band separated by a gap δɛ with relevant correlation energy Uff (Uff≥δɛ) and (ii) mixing of 4f localized states with ligand valence orbitals such that the hybridization energy V is of the same order of magnitude as the energy separation ΔE between the many-body configuration 4fn and 4fn+1L (V≥ΔE). These insulating materials, which cannot be classified as standard mixed-valence systems, are called here interatomic intermediate-valence systems. |
| abstract_unstemmed |
The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4H2O, which have similar local structure but different crystal structure. We show that L3 XANES final states are a direct probe of configuration interaction between 4fn and 4fn+1L configurations in the ground state and that the weight of the 4fn+1L in the ground state can be deduced. The many-body final states arise from the characteristic properties of these materials: (i) the presence of localized 4f level above the oxygen 2p band separated by a gap δɛ with relevant correlation energy Uff (Uff≥δɛ) and (ii) mixing of 4f localized states with ligand valence orbitals such that the hybridization energy V is of the same order of magnitude as the energy separation ΔE between the many-body configuration 4fn and 4fn+1L (V≥ΔE). These insulating materials, which cannot be classified as standard mixed-valence systems, are called here interatomic intermediate-valence systems. |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000naa a22002652 4500</leader><controlfield tag="001">NLEJ24942004X</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20231114101817.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">231114s1987 xx |||||o 00| ||und c</controlfield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)NLEJ24942004X</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-601)aps:fd4fca2f6d5f629f12dc85075a99ef59077809b9</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Specific intermediate-valence state of insulating 4f compounds detected by L3 x-ray absorption</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1987</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield></datafield><datafield tag="300" ind1=" " ind2=" "><subfield code="a">7</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">The intermediate valence of formally tetravalent compounds has been detected by L3 x-ray-absorption near-edge structure (XANES) in CeO2 and in PrO2 but not in UO2, which have the same CaF2 structure and large f and ligand mixing. The intermediate valence has been found both in CeO2 and in Ce(SO4)2⋅4H2O, which have similar local structure but different crystal structure. We show that L3 XANES final states are a direct probe of configuration interaction between 4fn and 4fn+1L configurations in the ground state and that the weight of the 4fn+1L in the ground state can be deduced. The many-body final states arise from the characteristic properties of these materials: (i) the presence of localized 4f level above the oxygen 2p band separated by a gap δɛ with relevant correlation energy Uff (Uff≥δɛ) and (ii) mixing of 4f localized states with ligand valence orbitals such that the hybridization energy V is of the same order of magnitude as the energy separation ΔE between the many-body configuration 4fn and 4fn+1L (V≥ΔE). These insulating materials, which cannot be classified as standard mixed-valence systems, are called here interatomic intermediate-valence systems.</subfield></datafield><datafield tag="533" ind1=" " ind2=" "><subfield code="f">APS Digital Backfile Archive 1893-2003</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Bianconi, A.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Marcelli, A.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Physical review / B</subfield><subfield code="d">College Park, Md. : APS, 1970</subfield><subfield code="g">35(1987), 2, Seite 806-812</subfield><subfield code="h">Online-Ressource</subfield><subfield code="w">(DE-627)NLEJ248237845</subfield><subfield code="w">(DE-600)1473011-X</subfield><subfield code="x">1550-235X</subfield><subfield code="7">nnns</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:35</subfield><subfield code="g">year:1987</subfield><subfield code="g">number:2</subfield><subfield code="g">pages:806-812</subfield><subfield code="g">extent:7</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://www.tib.eu/de/suchen/id/aps%3Afd4fca2f6d5f629f12dc85075a99ef59077809b9</subfield><subfield code="x">Verlag</subfield><subfield code="z">Deutschlandweit zugänglich</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">ZDB-1-APS</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_NL_ARTICLE</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">35</subfield><subfield code="j">1987</subfield><subfield code="e">2</subfield><subfield code="h">806-812</subfield><subfield code="g">7</subfield></datafield></record></collection>
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7.40189 |