Pseudogap behavior in Pr0.5Sr0.5MnO3: A photoemission study
The valence band electronic structure of Pr0.5Sr0.5MnO3 has been investigated across its paramagnetic metallic (PMM)-ferromagnetic metallic (FMM)-antiferromagnetic insulator (AFMI) transition. Using surface sensitive high resolution photoemission we have conclusively demonstrated the presence of a p...
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| Published in | Surface science Vol. 605; no. 9-10; pp. 875 - 877 |
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| Main Authors | , , |
| Format | Journal Article |
| Language | English |
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Kidlington
Elsevier
01.05.2011
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| Abstract | The valence band electronic structure of Pr0.5Sr0.5MnO3 has been investigated across its paramagnetic metallic (PMM)-ferromagnetic metallic (FMM)-antiferromagnetic insulator (AFMI) transition. Using surface sensitive high resolution photoemission we have conclusively demonstrated the presence of a pseudogap of magnitude 80 meV in the near Fermi level electronic spectrum in the PMM and FMM phases and finite intensity at the Fermi level in the charge ordering (CO)-AFMI phase. The pseudogap behavior is explained in terms of the strong electron-phonon interaction and the formation of Jahn Teller UT) polarons, indicating the charge localizations. The finite intensity at the Fermi level in the insulating phase showed a lack of charge ordering in the surface of the Pr0.5Sr0.5MnO3 samples. |
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| AbstractList | The valence band electronic structure of Pr0.5Sr0.5MnO3 has been investigated across its paramagnetic metallic (PMM)-ferromagnetic metallic (FMM)-antiferromagnetic insulator (AFMI) transition. Using surface sensitive high resolution photoemission we have conclusively demonstrated the presence of a pseudogap of magnitude 80 meV in the near Fermi level electronic spectrum in the PMM and FMM phases and finite intensity at the Fermi level in the charge ordering (CO)-AFMI phase. The pseudogap behavior is explained in terms of the strong electron-phonon interaction and the formation of Jahn Teller UT) polarons, indicating the charge localizations. The finite intensity at the Fermi level in the insulating phase showed a lack of charge ordering in the surface of the Pr0.5Sr0.5MnO3 samples. The valence band electronic structure of Pr0.5Sr0.5MnO3 has been investigated across its paramagnetic metallic (PMM)-ferromagnetic metallic (FMM)-antiferromagnetic insulator (AFMI) transition. Using surface sensitive high resolution photoemission we have conclusively demonstrated the presence of a pseudogap of magnitude 80 meV in the near Fermi level electronic spectrum in the PMM and FMM phases and finite intensity at the Fermi level in the charge ordering (CO)-AFMI phase. The pseudogap behavior is explained in terms of the strong electron-phonon interaction and the formation of Jahn Teller UT) polarons, indicating the charge localizations. The finite intensity at the Fermi level in the insulating phase showed a lack of charge ordering in the surface of the Pr0.5Sr0.5MnO3 samples. (C) 2011 Elsevier B.V. All rights reserved. |
| Author | ULFAT, I DALAI, M. K PAL, Prabir |
| Author_xml | – sequence: 1 givenname: Prabir surname: PAL fullname: PAL, Prabir organization: Molecular and Condensed Matter Physics, Department of Physics and Astronomy, Uppsala University, Box 516, 751 21 Uppsala, Sweden – sequence: 2 givenname: M. K surname: DALAI fullname: DALAI, M. K organization: National Physical Laboratory, Dr. K. S. Krishnan Marg, New Delhi-110 012, India – sequence: 3 givenname: I surname: ULFAT fullname: ULFAT, I organization: MAX-lab, Lund University, Box 118, 221 00, Lund, Sweden |
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| Snippet | The valence band electronic structure of Pr0.5Sr0.5MnO3 has been investigated across its paramagnetic metallic (PMM)-ferromagnetic metallic... |
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| SubjectTerms | Colossal magnetoresistance Condensed matter: electronic structure, electrical, magnetic, and optical properties Condensed matter: structure, mechanical and thermal properties Cross-disciplinary physics: materials science; rheology Electronic structure Exact sciences and technology Fysik NATURAL SCIENCES NATURVETENSKAP Photoemission Physical Sciences Physics |
| Title | Pseudogap behavior in Pr0.5Sr0.5MnO3: A photoemission study |
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