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Non-equilibrium Microwave Plasma for Efficient High Temperature Chemistry
Published on: August 1, 2017
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Nonequilibrium charge-density-wave order beyond the thermal limit.
J Maklar1, Y W Windsor2, C W Nicholson2,3
1Fritz-Haber-Institut der Max-Planck-Gesellschaft, Berlin, Germany. maklar@fhi-berlin.mpg.de.
Nature Communications
|May 4, 2021
Summary
Researchers observed nonthermal charge-density-wave (CDW) order persisting at high electronic temperatures, far beyond equilibrium limits. This non-equilibrium behavior, driven by intense light pulses, offers new insights into light-matter interactions.
Area of Science:
- Condensed matter physics
- Ultrafast phenomena
- Light-matter interactions
Background:
- Interactions between many-body systems and intense light pulses can create novel non-equilibrium states.
- Recent discoveries highlight the potential for light to influence material properties like superconductivity and hidden phases.
Purpose of the Study:
- To demonstrate and investigate nonthermal charge-density-wave (CDW) order at electronic temperatures exceeding thermodynamic limits.
- To explore the dynamics of photoinduced CDW-to-metal transitions under non-equilibrium conditions.
Main Methods:
- Utilizing time- and angle-resolved photoemission spectroscopy (TARPS) to probe electronic properties.
- Employing time-resolved X-ray diffraction (TRXRD) to analyze structural changes.
- Investigating the recovery dynamics of CDW order as a function of electronic temperature.
Main Results:
- Demonstrated nonthermal CDW order at electronic temperatures significantly higher than the equilibrium transition temperature.
- Observed a CDW recovery behavior distinct from equilibrium, attributed to suppressed lattice fluctuations.
- Characterized the electronic and structural order parameters during an ultrafast photoinduced CDW-to-metal transition.
Conclusions:
- Nonthermal CDW order can be stabilized at high electronic temperatures under intense light excitation.
- The observed non-equilibrium dynamics are influenced by transient nonthermal phonon distributions.
- A time-dependent Ginzburg-Landau framework successfully describes the coherent and incoherent order-parameter dynamics.
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