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Ultrafast switching of composite order in A3C60

MPG-Autoren
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Eckstein,  M.
Theory of Correlated Systems out of Equilibrium, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
University of Hamburg-CFEL;

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Zitation

Werner, P., Strand, H. U. R., Hoshino, S., & Eckstein, M. (2017). Ultrafast switching of composite order in A3C60. Physical Review B, 95(19): 195405. doi:10.1103/PhysRevB.95.195405.


Zitierlink: http://hdl.handle.net/21.11116/0000-0002-1523-F
Zusammenfassung
We study the controlled manipulation of the Jahn-Teller metal state of fulleride compounds using nonequilibrium dynamical mean-field theory. This anomalous metallic state is a spontaneous orbital-selective Mott phase, which is characterized by one metallic and two insulating orbitals. Using protocols based on transiently reduced hopping amplitudes or periodic electric fields, we demonstrate the possibility to switch orbitals between Mott insulating and metallic on a subpicosecond time scale, and to rotate the order parameter between three equivalent states that can be distinguished by their anisotropic conductance. The Jahn-Teller metal phase of alkali-doped fullerides thus provides a platform for ultrafast persistent memory devices.