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

Journal Article · · Nature Communications
 [1];  [2];  [3];  [3];  [4];  [5];  [3];  [5];  [2];  [1]
  1. Univ. Duisburg-Essen, Duisburg (Germany); Freie Univ. Berlin, Berlin (Germany)
  2. Freie Univ. Berlin, Berlin (Germany); Fritz-Haber-Institut der MPG, Berlin (Germany)
  3. Geballe Lab. for Advanced Materials, Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Geballe Lab. for Advanced Materials, Stanford, CA (United States)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)

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. In conclusion, 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.

Research Organization:
SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC03-76SF00515
OSTI ID:
1238254
Journal Information:
Nature Communications, Journal Name: Nature Communications Vol. 7; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Non-thermal separation of electronic and structural orders in a persisting charge density wave journal July 2014
Coherent dynamics of the charge density wave gap in tritellurides journal January 2014
Nonequilibrium “Melting” of a Charge Density Wave Insulator via an Ultrafast Laser Pulse journal May 2014
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Non-thermal separation of electronic and structural orders in a persisting charge density wave journal July 2014
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Coherent dynamics of the charge density wave gap in tritellurides journal January 2014
Alternative route to charge density wave formation in multiband systems journal December 2012
On the origin of charge-density waves in select layered transition-metal dichalcogenides journal May 2011
Ultrafast electron dynamics in the charge density wave material TbTe 3 journal June 2011
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Structural dynamics of two-dimensional charge-density waves in CeTe 3 investigated by ultrafast electron crystallography journal August 2012
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Clocking the Melting Transition of Charge and Lattice Order in 1 T − TaS 2 with Ultrafast Extreme-Ultraviolet Angle-Resolved Photoemission Spectroscopy journal October 2011
Nonequilibrium “Melting” of a Charge Density Wave Insulator via an Ultrafast Laser Pulse journal May 2014
Coherent Structural Dynamics of a Prototypical Charge-Density-Wave-to-Metal Transition journal July 2014
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Transient Electronic Structure and Melting of a Charge Density Wave in TbTe3 journal September 2008
Light-Induced Superconductivity in a Stripe-Ordered Cuprate journal January 2011
Ultrafast Switching to a Stable Hidden Quantum State in an Electronic Crystal journal April 2014
Ultrafast transient generation of spin-densitywave order in the normal state of BaFe2As2 driven by coherent lattice vibrations text January 2012
Alternative route to charge density wave formation in multiband systems text January 2012
Nonequilibrium "melting" of a charge density wave insulator via an ultrafast laser pulse text January 2013

Cited By (19)

Nonequilibrium charge-density-wave order beyond the thermal limit journal May 2021
High repetition pump-and-probe photoemission spectroscopy based on a compact fiber laser system text January 2016
Disentangling amplitude and phase dynamics of a charge density wave in a photo-induced phase transition text January 2018
Nonthermal pathways to ultrafast control in quantum materials text January 2021
Optically excited structural transition in atomic wires on surfaces at the quantum limit journal March 2017
Intertwined chiral charge orders and topological stabilization of the light-induced state of a prototypical transition metal dichalcogenide journal June 2019
Evidence for topological defects in a photoinduced phase transition journal October 2018
Angle-resolved photoemission spectroscopy and its application to topological materials journal August 2019
Strong light-field effects driven by nearly single-cycle 7 fs light-field in correlated organic conductors journal August 2018
Impact ionization dynamics in small band-gap two-dimensional materials from a coherent phonon mechanism journal July 2019
Ultrafast Spin Density Wave Transition in Chromium Governed by Thermalized Electron Gas journal September 2016
Charge Density Wave Melting in One-Dimensional Wires with Femtosecond Subgap Excitation journal July 2019
Excitonic and lattice contributions to the charge density wave in 1 T − TiS e 2 revealed by a phonon bottleneck journal September 2019
Ultrafast spin density wave transition in Chromium governed by thermalized electron gas text January 2016
Intertwined chiral charge orders and topological stabilization of the light-induced state of a prototypical transition metal dichalcogenide text January 2017
Strong light-field effects driven by nearly single-cycle 7-fs light field in correlated organic conductors text January 2018
Charge density wave melting in one-dimensional wires with femtosecond sub-gap excitation text January 2018
Angle-resolved photoemission spectroscopy and its application to topological materials text January 2021
Ultrafast spin density wave transition in chromium governed by thermalized electron gas text January 2016

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