Tunable metallicity of the La5/8Ca3/8MnO3(001) surface by an oxygen overlayer

K. Fuchigami; Z. Gai; T. Z. Ward; L. F. Yin; P. C. Snijders; E. W. Plummer; J. Shen

doi:10.1103/PhysRevLett.102.066104

Tunable metallicity of the La5/8Ca3/8MnO3(001) surface by an oxygen overlayer

K. Fuchigami, Z. Gai, T. Z. Ward, L. F. Yin, P. C. Snijders, E. W. Plummer, J. Shen

Functional Hybrid Nanomaterials

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Abstract

We studied the surface structure of La5/8Ca3/8MnO3(001) thin films using in situ scanning tunneling microscopy (STM). Atomically resolved STM images reveal that a (2×2)R45° reconstructed surface and a (1×1) surface can be converted back and forth through adsorption and desorption of oxygen at the surface. The electrical properties of the surfaces are investigated by scanning tunneling spectroscopy. I-V curves clearly show that the presence of an oxygen overlayer renders the surface insulating while the (1×1) surface without the oxygen overlayer is metallic.

Original language	English
Article number	066104
Journal	Physical Review Letters
Volume	102
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.102.066104
State	Published - Feb 13 2009

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10.1103/PhysRevLett.102.066104

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abstract = "We studied the surface structure of La5/8Ca3/8MnO3(001) thin films using in situ scanning tunneling microscopy (STM). Atomically resolved STM images reveal that a (2×2)R45° reconstructed surface and a (1×1) surface can be converted back and forth through adsorption and desorption of oxygen at the surface. The electrical properties of the surfaces are investigated by scanning tunneling spectroscopy. I-V curves clearly show that the presence of an oxygen overlayer renders the surface insulating while the (1×1) surface without the oxygen overlayer is metallic.",

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AU - Fuchigami, K.

AU - Gai, Z.

AU - Ward, T. Z.

AU - Yin, L. F.

AU - Snijders, P. C.

AU - Plummer, E. W.

AU - Shen, J.

PY - 2009/2/13

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AB - We studied the surface structure of La5/8Ca3/8MnO3(001) thin films using in situ scanning tunneling microscopy (STM). Atomically resolved STM images reveal that a (2×2)R45° reconstructed surface and a (1×1) surface can be converted back and forth through adsorption and desorption of oxygen at the surface. The electrical properties of the surfaces are investigated by scanning tunneling spectroscopy. I-V curves clearly show that the presence of an oxygen overlayer renders the surface insulating while the (1×1) surface without the oxygen overlayer is metallic.

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ER -

Tunable metallicity of the La5/8Ca3/8MnO3(001) surface by an oxygen overlayer

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