Creation of a novel inverted charge density wave state

Abstract

Charge density wave (CDW) order is an emergent quantum phase that is characterized by a periodic lattice distortion and charge density modulation, often present near superconducting transitions. Here we uncover a novel inverted CDW state by using a femtosecond laser to coherently over-drive the unique star-of-David lattice distortion in 1T-TaSe${}_2$. We track the signature of this novel CDW state using time- and angle-resolved photoemission spectroscopy and time-dependent density functional theory, and validate that it is associated with a unique lattice and charge arrangement never before realized. The dynamic electronic structure further reveals its novel properties, that are characterized by an increased density of states near the Fermi level, high metallicity, and altered electron-phonon couplings. Our results demonstrate how ultrafast lasers can be used to create unique states in materials, by manipulating charge-lattice orders and couplings.

arXiv comment13 pages, 5 figures

References in corpus (24)

• Electron-phonon interactions from first principles
• Ultrafast switching to a stable hidden topologically protected quantum state in an electronic crystal
• Inelastic Light Scattering From Correlated Electrons
• Nonlinear lattice dynamics as a basis for enhanced superconductivity in YBa2Cu3O6.5
• Ultrafast optical spectroscopy of strongly correlated materials and high-temperature superconductors: a non-equilibrium approach
• Unfolding spinor wavefunctions and expectation values of general operators: Introducing the unfolding-density operator
• Ultrafast melting of a charge-density wave in the Mott insulator 1T-TaS2
• Efficient formalism for large scale ab initio molecular dynamics based on time-dependent density functional theory
• Mapping momentum-dependent electron-phonon coupling and non-equilibrium phonon dynamics with ultrafast electron diffuse scattering
• Momentum-Resolved View of Electron-Phonon Coupling in Multilayer WSe${}_2$
• Spectroscopic signatures of a bandwidth-controlled Mott transition at the surface of 1T-TaSe${}_2$
• Direct determination of mode-projected electron-phonon coupling in the time-domain
• Anomalous Dispersion of Longitudinal Optical Phonons in $\mathbf{N}{\mathbf{d}}_{1.86}\mathbf{C}{\mathbf{e}}_{0.14}\mathbf{Cu}{\mathbf{O}}_{4+\mathbf{\delta }}$ Determined by Inelastic X-ray Scattering
• Coherent Phonon Coupling to Individual Bloch States in Photoexcited Bismuth
• Ultrafast Angle-Resolved Photoemission Spectroscopy of Quantum Materials
• Optical manipulation of electronic dimensionality in a quantum material
• Mode-resolved reciprocal space mapping of electron-phonon interaction in the Weyl semimetal candidate Td-WTe${}_2$
• Ultrafast electron calorimetry uncovers a new long-lived metastable state in 1T-TaSe${}_2$ mediated by mode-selective electron-phonon coupling
• Revealing the nature of the ultrafast magnetic phase transition in Ni by correlating extreme ultraviolet magneto-optic and photoemission spectroscopies
• Photoinduced Enhancement of the Charge Density Wave Amplitude
• Coherent modulation of the electron temperature and electron-phonon couplings in a 2D material
• Direct measurement of electron-phonon coupling with time-resolved ARPES
• Electronic band structure of BaCo${}_2$As${}_2$: a fully-doped ferropnictide with reduced electronic correlations
• Mode-selective coupling of coherent phonons to the Bi2212 electronic band structure

Cited by in corpus (2)

• Light-induced emergent phenomena in 2D materials and topological materials
• Toward nonthermal control of excited quantum materials: framework and investigations by ultrafast electron scattering and imaging