Charge Order at High Temperature in Cuprate Superconductors

Arpaia, Riccardo; Ghiringhelli, G.

doi:10.7566/jpsj.90.111005

Cited by 54 publications

(26 citation statements)

References 133 publications

(204 reference statements)

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“…An important feature of all cuprates is the charge density instability of hole doped CuO 2 planes [20][21][22]. It emerges in the form of charge density waves (CDW) in selected regions of the temperature/doping (T /p) phase diagram [23][24][25][26], and of charge density fluctuations (CDF) over a more extended set of T and p values [27][28][29]. To our knowledge, CDW and/or CDF have not been reported so far in infinite-layer nickelate thin films.…”

mentioning

confidence: 99%

Charge and spin order dichotomy in NdNiO$_2$ driven by SrTiO$_3$ capping layer

Krieger,

Martinelli,

Zeng

et al. 2021

Preprint

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Superconductivity in infinite-layer nickelates holds exciting analogies with that of cuprates, with similar structures and 3d-electron count.Using resonant inelastic x-ray scattering (RIXS) we studied electronic and magnetic excitations and charge density correlations in Nd1−xSrxNiO2 thin films with and without an SrTiO3 capping layer. We observe dispersing magnons only in the capped samples, progressively dampened at higher doping. In addition, we detect an elastic resonant scattering peak in the uncapped x = 0 compound at wave vector ( 1 /3, 0), remindful of the charge order signal in hole doped cuprates. The peak weakens at x = 0.05 and disappears in the superconducting x = 0.20 film. The uncapped samples also present a higher degree of Ni3d-Nd5d hybridization and a smaller anisotropy of the Ni3d occupation with respect to the capped samples. The role of the capping on the possible hydrogen incorporation or on other mechanisms responsible for the electronic reconstruction far from the interface remains to be understood.

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mentioning

confidence: 99%

Charge and spin order dichotomy in NdNiO$_2$ driven by SrTiO$_3$ capping layer

Krieger,

Martinelli,

Zeng

et al. 2021

Preprint

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“…There is mounting experimental evidence dynamical charge fluctuations play an important role across the phase diagram of cuprate HTSC [46], which could play an important role in strange metallic transport, [8,14,47].…”

Section: Strange Metallic Transportmentioning

confidence: 99%

“…and the last factor vanishes by the equations of motion (41). Writing (44) in terms of the Fourier transform of the source (43) δµ a (ω, q) = dt e −iωt δµ a (t, q) = δµ a (q) −iω + 0 + , (46) gives iωδn a (ω, q) + M ab (q) (δn b (ω, q) − χ bc (q)δµ c (ω, q)) = 0 . (…”

Section: Constitutive Relations With Sourcesmentioning

confidence: 99%

Damping of Pseudo-Goldstone Fields

Delacrétaz,

Goutéraux,

Ziogas

2021

Preprint

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Approximate symmetries abound in Nature. If these symmetries are also spontaneously broken in the groundstate, the would-be Goldstone modes acquire a small mass, or inverse correlation length, and are referred to as pseudo-Goldstones. At nonzero temperature, the effects of dissipation can be captured by hydrodynamics at sufficiently long scales compared to the local equilibrium. Here we show that in the limit of weak explicit breaking, locality of hydrodynamics implies that the damping of pseudo-Goldstones is completely determined by their mass and diffusive transport coefficients. We present many applications: superfluids, QCD in the chiral limit, Wigner crystal and density wave phases in the presence of an external magnetic field or not, nematic phases and (anti-)ferromagnets. For electronic density wave phases, pseudo-Goldstone damping generates a contribution to the resistivity independent of the strength of disorder, which can have a linear temperature dependence provided the associated diffusivity saturates a bound. This is reminiscent of the phenomenology of strange metal high Tc superconductors, where charge density waves are observed across the phase diagram.

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“…HTSs have complex phase diagrams that include competing spin-, charge-and pair-density-waves, a pseudogap, and strange metallic behavior [18][19][20][21][22][23][24]. The pivotal parameter that determines the nature of the ground state at a given temperature is the doping p, which gives the number of holes introduced in the CuO 2 planes.…”

Section: Introductionmentioning

confidence: 99%

Doping-dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates

Peng,

Martinelli,

et al. 2021

Preprint

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While electron-phonon coupling (EPC) is crucial for Cooper pairing in conventional superconductors, its role in high-Tc superconducting cuprates is debated. Using resonant inelastic xray scattering at the oxygen K-edge, we studied the EPC in Bi2Sr2CaCu2O 8+δ (Bi2212) and Nd1+xBa2−xCu3O 7−δ (NBCO) at different doping levels ranging from heavily underdoped (p = 0.07) to overdoped (p = 0.21). We analyze the data with a localized Lang-Firsov model that allows for the coherent excitations of two phonon modes. While electronic band dispersion effects are nonnegligible, we are able to perform a study of the relative values of EPC matrix elements in these cuprate families. In the case of NBCO, the choice of the excitation energy allows us to disentangle modes related to the CuO3 chains and the CuO2 planes. Combining the results from the two families, we find the EPC strength decreases with doping at q = (−0.25, 0) r.l.u., but has a nonmonotonic trend as a function of doping at smaller momenta. This behavior is attributed to the screening effect of charge carriers. We also find that the phonon intensity is enhanced in the vicinity of the charge-density-wave (CDW) excitations while the extracted EPC strength appears to be less sensitive to their proximity. By performing a comparative study of two cuprate families, we are able to identify general trends in the EPC for the cuprates and provide experimental input to theories invoking a synergistic role for this interaction in d-wave pairing.

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Charge Order at High Temperature in Cuprate Superconductors

Cited by 54 publications

References 133 publications

Charge and spin order dichotomy in NdNiO$_2$ driven by SrTiO$_3$ capping layer

Charge and spin order dichotomy in NdNiO$_2$ driven by SrTiO$_3$ capping layer

Damping of Pseudo-Goldstone Fields

Doping-dependence of the electron-phonon coupling in two families of bilayer superconducting cuprates

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