Photoinduced Dynamics in the Charge Density Wave Compound 4HB-TaSe2
1 Laser Research Institute, Stellenbosch University, Private Bag X1, Matieland 7602, South Africa
2 Department of Physics and Center of Applied Photonics and Zukunftskolleg, University of Konstanz, D-78457 Konstanz, Germany
3 Physics Department, EPFL, CH-1015 Lausanne, Switzerland
We report on ultrafast photoindued charge density wave (CDW) dynamics in the transition-metal dichalcogenide 4Hb-TaSe2, studied with ultrafast electron diffraction. Fluence dependence of the lattice superstructure suppression show a phase transition from the commensurate to the incommensurate phase of 4Hb-TaSe2. Unusually long recovery times of perturbed charge density waves indicate th importance of a coupling between the two dimensional CDWs.
© Owned by the authors, published by EDP Sciences, 2013
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