Ultrafast filling of an electronic pseudogap in an incommensurate crystal

Brouet, V.; Mauchain, Julien; Papalazarou, E.; Faure, Jérôme; Marsi, M.; Lin, Ping-Hui; Taleb‐Ibrahimi, A.; Fèvre, P. Le; Bertran, F.; Cario, Laurent; Janod, Étienne; Corraze, B.; Phuoc, V. Ta; Perfetti, L.

doi:10.1103/physrevb.87.041106

Cited by 20 publications

(18 citation statements)

References 27 publications

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“…In RTe3, the states of the R ion are localized and shifted away from the Fermi energy. Therefore, they are expected to play no role in the physics of the CDW [17] [22]. To avoid complications with the f states in standard densityfunctional theory, we have performed our calculations for LaTe3 in the framework of the mixed basis pseudopotential method [23].…”

Section: Theorymentioning

confidence: 99%

Competing soft phonon modes at the charge-density-wave transitions in DyTe3

et al. 2018

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The family of rare-earth tritellurides RTe3 features charge-density-wave (CDW) order related to strongly momentum-dependent electron-phonon coupling. Similar to other CDW compounds, superconductivity is observed when the CDW order is suppressed via hydrostatic pressure [1]. What sets the heavier members of the RTe3 series apart is the observation of a second CDW transition at lower temperatures having an in-plane ordering wavevector , ∥ [ ] of almost the same magnitude but orthogonal to the ordering wavevector , ∥ [ ] observed at higher temperatures [2]. Here, we report an inelastic x-ray scattering investigation of the lattice dynamics of DyTe3. In particular, we show that there are several phonon modes along both in-plane directions, which respond to the onset of the CDW transition at , =. Surprisingly, these soft modes close to , = ( . , , ) show strong softening near , but do not exhibit any response to the lower-temperature transition at , = . Our results indicate that the low-temperature CDW order is not just the 90° rotated analogue of the one appearing at high temperatures.

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Section: Theorymentioning

confidence: 99%

Competing soft phonon modes at the charge-density-wave transitions in DyTe3

et al. 2018

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“…Recent developments in high-resolution time-and angle-resolved photoemission spectroscopy (trARPES) now make these studies possible. So far, however, most of the trARPES studies have focused on recombination dynamics of photo-induced quasiparticle population [17][18][19][20][21] and gap dynamics [5,7,22,23].…”

mentioning

confidence: 99%

Ultrafast quenching of electron–boson interaction and superconducting gap in a cuprate superconductor

et al. 2014

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Ultrafast spectroscopy is an emerging technique with great promise in the study of quantum materials, as it makes it possible to track similarities and correlations that are not evident near equilibrium. Thus far, however, the way in which these processes modify the electron self-energy-a fundamental quantity describing many-body interactions in a material-has been little discussed. Here we use time-and angle-resolved photoemission to directly measure the ultrafast response of self-energy to near-infrared photoexcitation in hightemperature cuprate superconductor. Below the critical temperature of the superconductor, ultrafast excitations trigger a synchronous decrease of electron self-energy and superconducting gap, culminating in a saturation in the weakening of electron-boson coupling when the superconducting gap is fully quenched. In contrast, electron-boson coupling is unresponsive to ultrafast excitations above the critical temperature of the superconductor and in the metallic state of a related material. These findings open a new pathway for studying transient self-energy and correlation effects in solids.

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“…Namely the role of excitations and possible fingerprints of the ordered state within the metallic regime is of vital importance for the general understanding of metal-insulator transitions beyond the traditional Mott-and Slater-type scenarios. Moreover the VS 2 -layer building block is also an object of interest in the context of novel time-dependent electronic structure studies [25].…”

Section: Introductionmentioning

confidence: 99%

Hidden spin-orbital hexagonal ordering induced by strong correlations in LiVS2

Boehnke

Lichtenstein

Katsnelson³

et al. 2020

Phys. Rev. B

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We develop a versatile first-principles many-body scheme for multiorbital lattice susceptibilities including full frequency-dependent local vertex effects and investigate the different instabilities in the metallic phase of the quasi-two-dimensional compound LiVS 2 . Application of such advanced correlated electronic structure methods for the t 2g subspace reveals a highly entangled spin-orbital hexagonal ordering bringing about an inherently intersite order parameter for the trimerization transition. The importance of such nontrivial ordering towards the formation of intriguing insulating phases at low temperatures is discussed.

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Ultrafast filling of an electronic pseudogap in an incommensurate crystal

Cited by 20 publications

References 27 publications

Competing soft phonon modes at the charge-density-wave transitions in DyTe3

Competing soft phonon modes at the charge-density-wave transitions in DyTe3

Ultrafast quenching of electron–boson interaction and superconducting gap in a cuprate superconductor

Hidden spin-orbital hexagonal ordering induced by strong correlations in LiVS2

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