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Hybridization of lattice and charge order excitations in a superconducting cuprate

This work reports on high-resolution inelastic X-ray scattering experiments revealing a striking renormalization of the phonon spectra of high-T_c cuprates associated with the formation of charge density waves. Their origin is attributed to the hybridization of phonons with dispersive collective excitations of the charge density waves, providing insights in the role of electron-phonon interaction in high temperature superconductors.

Sofia-Michaela Souliou
Daisuke Ishikawa
Matthieu Le Tacon
ResearchOpen Access01 Sept 2025
Communications Physics

Volume: 8, P: 1-7
Unveiling excitonic insulator signatures in Ta\(_\textrm{2}\)NiSe\(_\textrm{5}\) through structural and orbital probes

Nour Maraytta
Peter Nagel
Michael Merz
ResearchOpen Access07 Oct 2025
Scientific Reports

Volume: 15, P: 1-11
An electronic nematic liquid in BaNi₂As₂

Electronic nematicity is typically associated with the breaking of rotational symmetry. Here the authors report unusual nematicity in BaNi2As2, manifested in a large splitting of the optical phonon mode above the structural transition temperature, and link it to the coupling between the lattice and nematic fluctuations.

Yi Yao
Roland Willa
Matthieu Le Tacon
ResearchOpen Access04 Aug 2022
Nature Communications

Volume: 13, P: 1-9
Origin of the chiral charge density wave in transition-metal dichalcogenide

The mechanism of chiral symmetry breaking in condensed matter systems is not well understood. Now charge-lattice symmetry frustration has been shown to be a key factor governing chirality in a charge density wave of 1T-TiSe₂.

Kwangrae Kim
Hyun-Woo J. Kim
B. J. Kim
Research14 Oct 2024
Nature Physics

Volume: 20, P: 1919-1926
Author Correction: Paramagnons and high-temperature superconductivity in a model family of cuprates

Lichen Wang
Guanhong He
Yuan Li
Amendments and CorrectionsOpen Access25 May 2023
Nature Communications

Volume: 14, P: 1
Paramagnons and high-temperature superconductivity in a model family of cuprates

Finding a parameter that limits the critical temperature of cuprate superconductors can provide crucial insight on the superconducting mechanism. Here, the authors use inelastic photon scattering on two Ruddlesden-Popper members of the model Hg-family of cuprates to reveal that the energy of magnetic fluctuations may play such a role, and suggest that the Cooper pairing is mediated by paramagnons.

Lichen Wang
Guanhong He
Yuan Li
ResearchOpen Access07 Jun 2022
Nature Communications

Volume: 13, P: 1-8
Strange semimetal dynamics in SrIrO₃

It remains challenging to resolve the dynamics of charges with different mobilities in multi-band systems. Here, the authors report a Raman scattering study of the dynamics of holes and electrons in semimetallic SrIrO₃, which is well described by a marginal Fermi liquid phenomenology, with frequency dependent scattering rates close to the Planckian limit.

K. Sen
D. Fuchs
M. Le Tacon
ResearchOpen Access26 Aug 2020
Nature Communications

Volume: 11, P: 1-9
Using strain to uncover the interplay between two- and three-dimensional charge density waves in high-temperature superconducting YBa₂Cu₃O_y

Strain is a valuable tuning knob for studying the electronic properties of quantum materials. Here, the authors use strain to modulate and study the competition between 2D and 3D charge orders in a high-temperature superconductor.

I. Vinograd
S. M. Souliou
M. Le Tacon
ResearchOpen Access16 Apr 2024
Nature Communications

Volume: 15, P: 1-9
Hard antinodal gap revealed by quantum oscillations in the pseudogap regime of underdoped high-T_c superconductors

A careful study of quantum oscillations of single crystals of the cuprate superconductor YBCO placed under a magnetic field reveals a sawtooth behaviour that is reminiscent of two-dimensional electronic systems—in turn suggesting the existence of a so-called ‘hard antinodal gap’ in this system.

Máté Hartstein
Yu-Te Hsu
Neil Harrison
Research25 May 2020
Nature Physics

Volume: 16, P: 841-847
Dynamics of collective modes in an unconventional charge density wave system BaNi₂As₂

Exotic states of solid-state matter give rise to collective excitations that can be probed by ultrafast spectroscopy. Here, a series of charge-density-wave amplitude modes are observed in a non-magnetic pnictide whose robustness against perturbations indicate an unconventional formation mechanism.

Amrit Raj Pokharel
Vladimir Grigorev
Jure Demsar
ResearchOpen Access07 Jun 2022
Communications Physics

Volume: 5, P: 1-8
Probing the energy gap of high-temperature cuprate superconductors by resonant inelastic x-ray scattering

Hakuto Suzuki
Matteo Minola
Bernhard Keimer
ResearchOpen Access14 Dec 2018
npj Quantum Materials

Volume: 3, P: 1-8

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