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Persistent order due to transiently enhanced nesting in an electronically excited charge density wave

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  • L. Rettig

    (Fakultät für Physik, Universität Duisburg-Essen
    Fachbereich Physik, Freie Universität Berlin
    Present address: Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland)

  • R. Cortés

    (Fachbereich Physik, Freie Universität Berlin
    Fritz-Haber-Institut der MPG
    Present address: Physical Review Letters, American Physical Society, 1 Research Road, Ridge, 11961 New York, USA)

  • J.-H. Chu

    (Geballe Laboratory for Advanced Materials
    SLAC National Accelerator Laboratory, Stanford Institute for Material and Energy Sciences)

  • I. R. Fisher

    (Geballe Laboratory for Advanced Materials
    SLAC National Accelerator Laboratory, Stanford Institute for Material and Energy Sciences)

  • F. Schmitt

    (Geballe Laboratory for Advanced Materials)

  • R. G. Moore

    (SLAC National Accelerator Laboratory, Stanford Institute for Material and Energy Sciences)

  • Z.-X. Shen

    (Geballe Laboratory for Advanced Materials
    SLAC National Accelerator Laboratory, Stanford Institute for Material and Energy Sciences)

  • P. S. Kirchmann

    (SLAC National Accelerator Laboratory, Stanford Institute for Material and Energy Sciences)

  • M. Wolf

    (Fachbereich Physik, Freie Universität Berlin
    Fritz-Haber-Institut der MPG)

  • U. Bovensiepen

    (Fakultät für Physik, Universität Duisburg-Essen
    Fachbereich Physik, Freie Universität Berlin)

Abstract

Non-equilibrium conditions may lead to novel properties of materials with broken symmetry ground states not accessible in equilibrium as vividly demonstrated by non-linearly driven mid-infrared active phonon excitation. Potential energy surfaces of electronically excited states also allow to direct nuclear motion, but relaxation of the excess energy typically excites fluctuations leading to a reduced or even vanishing order parameter as characterized by an electronic energy gap. Here, using femtosecond time- and angle-resolved photoemission spectroscopy, we demonstrate a tendency towards transient stabilization of a charge density wave after near-infrared excitation, counteracting the suppression of order in the non-equilibrium state. Analysis of the dynamic electronic structure reveals a remaining energy gap in a highly excited transient state. Our observation can be explained by a competition between fluctuations in the electronically excited state, which tend to reduce order, and transiently enhanced Fermi surface nesting stabilizing the order.

Suggested Citation

  • L. Rettig & R. Cortés & J.-H. Chu & I. R. Fisher & F. Schmitt & R. G. Moore & Z.-X. Shen & P. S. Kirchmann & M. Wolf & U. Bovensiepen, 2016. "Persistent order due to transiently enhanced nesting in an electronically excited charge density wave," Nature Communications, Nature, vol. 7(1), pages 1-6, April.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms10459
    DOI: 10.1038/ncomms10459
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    Cited by:

    1. Shuvam Sarkar & Joydipto Bhattacharya & Pampa Sadhukhan & Davide Curcio & Rajeev Dutt & Vipin Kumar Singh & Marco Bianchi & Arnab Pariari & Shubhankar Roy & Prabhat Mandal & Tanmoy Das & Philip Hofman, 2023. "Charge density wave induced nodal lines in LaTe3," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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