Control of the electronic phase of a manganite by mode-selective vibrational excitation

Matteo Rini (), Ra'anan Tobey, Nicky Dean, Jiro Itatani, Yasuhide Tomioka, Yoshinori Tokura, Robert W. Schoenlein and Andrea Cavalleri ()
Additional contact information
Matteo Rini: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Ra'anan Tobey: Clarendon Laboratory, University of Oxford
Nicky Dean: Clarendon Laboratory, University of Oxford
Jiro Itatani: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Yasuhide Tomioka: Correlated Electron Research Center, AIST, Tsukuba, Ibaraki, 305-8562 Japan
Yoshinori Tokura: Correlated Electron Research Center, AIST, Tsukuba, Ibaraki, 305-8562 Japan
Robert W. Schoenlein: Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Andrea Cavalleri: Clarendon Laboratory, University of Oxford

Nature, 2007, vol. 449, issue 7158, 72-74

Abstract: Exciting vibrations There are various subtle ways of triggering phase change in a solid: for example, by using a pulse of light or electrical current to inject 'hot' charges that change the electronic state of a system. Rini et al. now report a very different approach, the use of ultrafast pulses of terahertz radiation to excite an individual vibrational mode in a magneto-resistive manganite. In this system, which has strongly correlated electrons, even subtle changes of crystal structure can profoundly effect the electronic and magnetic properties. The activated vibration is sufficient to drive the material from a stable insulating phase to a metastable metallic one. Phase control by coherent manipulation of selected vibrational modes — metal–oxygen phonons in particular — could find application in other complex solids; for example, in addressing how Cu–O vibrations affect the electronic properties of high-temperature superconductors.

Date: 2007
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DOI: 10.1038/nature06119

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