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<p>Metallic hydrogen and hydride materials stand as promising avenues to achieve room-temperature superconductivity. Characterized by their high phonon frequencies and moderate coupling strengths, several high-pressure hydrides were theoretically predicted to exhibit transition temperatures (<i>T</i><sub><i>c</i></sub>) exceeding 250 K, a claim further substantiated by experimental evidence. In an effort to push <i>T</i><sub><i>c</i></sub> beyond room temperature, we introduce a dynamical method that involves stimulating hydrides with mid-infrared lasers. Employing Floquet first-principles simulations, we observe that in a nonequilibrium state induced by light, both the electronic density of states and the coupling to high-energy phonons see notable enhancements. These simultaneous improvements collectively could potentially result in an estimated 20%–30% rise in <i>T</i><sub><i>c</i></sub> in practical pump conditions. Our theoretical investigation, therefore, offers a novel strategy to potentially raise the <i>T</i><sub><i>c</i></sub> of hydrides above room temperature.</p>

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Dynamical approach to realize room-temperature superconductivity in LaH10

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月14日

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  • Chendi Xie,
  • Adam D. Smith,
  • Haoran Yan,
  • Wei-Chih Chen,
  • Yao Wang

摘要

Metallic hydrogen and hydride materials stand as promising avenues to achieve room-temperature superconductivity. Characterized by their high phonon frequencies and moderate coupling strengths, several high-pressure hydrides were theoretically predicted to exhibit transition temperatures (Tc) exceeding 250 K, a claim further substantiated by experimental evidence. In an effort to push Tc beyond room temperature, we introduce a dynamical method that involves stimulating hydrides with mid-infrared lasers. Employing Floquet first-principles simulations, we observe that in a nonequilibrium state induced by light, both the electronic density of states and the coupling to high-energy phonons see notable enhancements. These simultaneous improvements collectively could potentially result in an estimated 20%–30% rise in Tc in practical pump conditions. Our theoretical investigation, therefore, offers a novel strategy to potentially raise the Tc of hydrides above room temperature.