Journal article

Ultrafast switching of composite order in ${A}_{3}{\mathrm{C}}_{60}$

  • Werner, Philipp Department of Physics, University of Fribourg, Switzerland
  • Strand, Hugo U. R. Department of Physics, University of Fribourg, Switzerland
  • Hoshino, Shintaro RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, Japan
  • Eckstein, Martin Max Planck Research Department for Structural Dynamics, University of Hamburg-CFEL, Germany
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Published in:
  • Physical Review B. - 2017, vol. 95, no. 19, p. 195405
English 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.
Faculté des sciences et de médecine
Département de Physique
  • English
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