Pseudogap formation in the metallic state of La0.7 Sr 0.3 MnO3 thin films

Udai Raj Singh; Anjan K. Gupta; Goutam Sheet; Venkat Chandrasekhar; H. W. Jang; C. B. Eom

doi:10.1063/1.3028072

Pseudogap formation in the metallic state of La_0.7 Sr _0.3 MnO₃ thin films

Udai Raj Singh, Anjan K. Gupta, Goutam Sheet, Venkat Chandrasekhar, H. W. Jang, C. B. Eom

Physics and Astronomy

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

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Abstract

We report on scanning tunneling microscopy and spectroscopy (STM/S) studies of epitaxial La_0.7 Sr_0.3 MnO₃ (LSMO) thin films on a lattice matched (001) La_0.3Sr_0.7 Al _0.35 Ta_0.35O₉ substrate for both as-grown and annealed films. In contrast to the as-grown films, the films annealed at 800 °C in air show atomic terraces with spectra that develop a gaplike structure with cooling. We show that the gap structure can be attributed to the predicted pseudogap in the manganites. Unlike several previous reports, we did not find electronic inhomogeneities in LSMO by STM/S.

Original language	English (US)
Article number	212503
Journal	Applied Physics Letters
Volume	93
Issue number	21
DOIs	https://doi.org/10.1063/1.3028072
State	Published - 2008

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Physics and Astronomy (miscellaneous)

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title = "Pseudogap formation in the metallic state of La0.7 Sr 0.3 MnO3 thin films",

abstract = "We report on scanning tunneling microscopy and spectroscopy (STM/S) studies of epitaxial La0.7 Sr0.3 MnO3 (LSMO) thin films on a lattice matched (001) La0.3Sr0.7 Al 0.35 Ta0.35O9 substrate for both as-grown and annealed films. In contrast to the as-grown films, the films annealed at 800 °C in air show atomic terraces with spectra that develop a gaplike structure with cooling. We show that the gap structure can be attributed to the predicted pseudogap in the manganites. Unlike several previous reports, we did not find electronic inhomogeneities in LSMO by STM/S.",

author = "Singh, {Udai Raj} and Gupta, {Anjan K.} and Goutam Sheet and Venkat Chandrasekhar and Jang, {H. W.} and Eom, {C. B.}",

note = "Funding Information: The authors thank Tien-Ming Chuang for the transport and magnetization measurements on the as-grown samples. This work was supported by the U.S. Department of Energy through Grant No. DE-FG02-06ER46346 and Department of Science and Technology of the Government of India. U.R.S. acknowledges CSIR, India.",

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doi = "10.1063/1.3028072",

language = "English (US)",

volume = "93",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

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TY - JOUR

T1 - Pseudogap formation in the metallic state of La0.7 Sr 0.3 MnO3 thin films

AU - Singh, Udai Raj

AU - Gupta, Anjan K.

AU - Sheet, Goutam

AU - Chandrasekhar, Venkat

AU - Jang, H. W.

AU - Eom, C. B.

N1 - Funding Information: The authors thank Tien-Ming Chuang for the transport and magnetization measurements on the as-grown samples. This work was supported by the U.S. Department of Energy through Grant No. DE-FG02-06ER46346 and Department of Science and Technology of the Government of India. U.R.S. acknowledges CSIR, India.

PY - 2008

Y1 - 2008

N2 - We report on scanning tunneling microscopy and spectroscopy (STM/S) studies of epitaxial La0.7 Sr0.3 MnO3 (LSMO) thin films on a lattice matched (001) La0.3Sr0.7 Al 0.35 Ta0.35O9 substrate for both as-grown and annealed films. In contrast to the as-grown films, the films annealed at 800 °C in air show atomic terraces with spectra that develop a gaplike structure with cooling. We show that the gap structure can be attributed to the predicted pseudogap in the manganites. Unlike several previous reports, we did not find electronic inhomogeneities in LSMO by STM/S.

AB - We report on scanning tunneling microscopy and spectroscopy (STM/S) studies of epitaxial La0.7 Sr0.3 MnO3 (LSMO) thin films on a lattice matched (001) La0.3Sr0.7 Al 0.35 Ta0.35O9 substrate for both as-grown and annealed films. In contrast to the as-grown films, the films annealed at 800 °C in air show atomic terraces with spectra that develop a gaplike structure with cooling. We show that the gap structure can be attributed to the predicted pseudogap in the manganites. Unlike several previous reports, we did not find electronic inhomogeneities in LSMO by STM/S.

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DO - 10.1063/1.3028072

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JF - Applied Physics Letters

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ER -

Pseudogap formation in the metallic state of La_0.7 Sr _0.3 MnO₃ thin films

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