Pseudogap behavior in Pr0.5Sr0.5MnO3: A photoemission study

Prabir Pal; M. K. Dalai; Intikhab Ulfat

doi:10.1016/j.susc.2011.01.031

Pseudogap behavior in Pr0.5Sr0.5MnO3: A photoemission study

Prabir Pal, M. K. Dalai, Intikhab Ulfat

MAX IV Laboratory

Research output: Contribution to journal › Article › peer-review

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. (C) 2011 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	875-877
Journal	Surface Science
Volume	605
Issue number	9-10
DOIs	https://doi.org/10.1016/j.susc.2011.01.031
Publication status	Published - 2011

Subject classification (UKÄ)

Physical Sciences
Natural Sciences

Free keywords

Electronic structure
Photoemission
Colossal magnetoresistance

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10.1016/j.susc.2011.01.031

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title = "Pseudogap behavior in Pr0.5Sr0.5MnO3: A photoemission study",

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. (C) 2011 Elsevier B.V. All rights reserved.",

keywords = "Electronic structure, Photoemission, Colossal magnetoresistance",

author = "Prabir Pal and Dalai, {M. K.} and Intikhab Ulfat",

year = "2011",

doi = "10.1016/j.susc.2011.01.031",

language = "English",

volume = "605",

pages = "875--877",

journal = "Surface Science",

issn = "0039-6028",

publisher = "Elsevier",

number = "9-10",

}

TY - JOUR

T1 - Pseudogap behavior in Pr0.5Sr0.5MnO3: A photoemission study

AU - Pal, Prabir

AU - Dalai, M. K.

AU - Ulfat, Intikhab

PY - 2011

Y1 - 2011

N2 - 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.

AB - 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.

KW - Electronic structure

KW - Photoemission

KW - Colossal magnetoresistance

U2 - 10.1016/j.susc.2011.01.031

DO - 10.1016/j.susc.2011.01.031

M3 - Article

SN - 0039-6028

VL - 605

SP - 875

EP - 877

JO - Surface Science

JF - Surface Science

IS - 9-10

ER -

Pseudogap behavior in Pr0.5Sr0.5MnO3: A photoemission study

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