Nematic fluctuations in the cuprate superconductor Bi2Sr2CaCu2O8+δ

Auvray, Nicolas; Loret, B.; Benhabib, S.; Cazayous, M.; Zhong, Ruidan; Schneeloch, John; Gu, Genda; Forget, A.; Colson, D.; Paul, I.; Sacuto, A.; Gallais, Yann

doi:10.1038/s41467-019-12940-w

Cited by 61 publications

(44 citation statements)

References 56 publications

(59 reference statements)

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“…Indeed, our ultrasound experiment does not detect any significant B 1g susceptibility in the vicinity of T ≈ 130 K [53]. The lack of B 1g susceptibility at the pseudogap temperature is also reported in symmetry-resolved electronic Raman scattering experiments in Bi 2 Sr 2 CaCu 2 O 8+δ [54]. The onset temperature of our detection of B 1g susceptibility is actually comparable to the CDW onset temperature T CDW = 70 ± 15 K [5][6][7].…”

Section: A the Special Coupling With B1g Strainsupporting

confidence: 81%

High magnetic field ultrasound study of spin freezing in La1.88Sr0.12CuO4

et al. 2021

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High-Tc cuprate superconductors host spin, charge and lattice instabilities. In particular, in the antiferromagnetic glass phase, over a large doping range, lanthanum based cuprates display a glass-like spin freezing with antiferromagnetic correlations. Previously, sound velocity anomalies in La2−xSrxCuO4 (LSCO) for hole doping p ≥ 0.145 were reported and interpreted as arising from a coupling of the lattice to the magnetic glass [Frachet, Vinograd et al., Nat. Phys. 16, 1064-1068]. Here we report both sound velocity and attenuation in LSCO p = 0.12, i.e. at a doping level for which the spin freezing temperature is the highest. Using high magnetic fields and comparing with nuclear magnetic resonance (NMR) measurements, we confirm that the anomalies in the low temperature ultrasound properties of LSCO are produced by a coupling between the lattice and the spin glass. Moreover, we show that both sound velocity and attenuation can be simultaneously accounted for by a simple phenomenological model originally developed for canonical spin glasses. Our results point towards a strong competition between superconductivity and spin freezing, tuned by the magnetic field. A comparison of different acoustic modes suggests that the slow spin fluctuations have a nematic character.

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Section: A the Special Coupling With B1g Strainsupporting

confidence: 81%

High magnetic field ultrasound study of spin freezing in La1.88Sr0.12CuO4

et al. 2021

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“…Recently, electronic nematicity that spontaneously breaks the rotational symmetry of the underlying crystal lattice has been a growing issue in strongly correlated electron systems [14], including cuprates [15][16][17][18], iron pnictides and chalcogenides [19][20][21], and heavy fermion compounds [22]. Understanding the role of the critical quantum fluctuations of nematic order on the normal and superconducting states is of utmost importance [19,23].…”

Section: Introductionmentioning

confidence: 99%

Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1−xSx

Huang

Hosoi

Čulo³

et al. 2020

Phys. Rev. Research

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Non-Fermi liquids are strange metals whose physical properties deviate qualitatively from those of conventional metals due to strong quantum fluctuations. In this paper, we report transport measurements on the FeSe 1−x S x superconductor, which has a quantum critical point of a nematic order without accompanying antiferromagnetism. We find that in addition to a linear-in-temperature resistivity ρ xx ∝ T , which is close to the Planckian limit, the Hall angle varies as cot θ H ∝ T 2 and the low-field magnetoresistance is well scaled as ρ xx /ρ xx ∝ tan 2 θ H in the vicinity of the nematic quantum critical point. This set of anomalous charge transport properties show striking resemblance with those reported in cuprate, iron-pnictide, and heavy fermion superconductors, demonstrating that the critical fluctuations of a nematic order with q ≈ 0 can also lead to a breakdown of the Fermi liquid description.

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“…Still, already at this point it is instructive to compare our results with what has been found by means of other approaches. In the recent paper 39 , a detailed DMRG analysis of the Hubbard model phase diagram with hole doping ≤ 12.5% has been conducted (which would correspond to sectors (7,7), (7,8), (8,8) in our case), and it was shown that for such hole concentration and negative values of t ′ , the model is in the Luther-Emery liquid phase 51 which is very stable upon varying U and t ′ . This is consistent with our observation that the signs of QCP fade away for all values of the next-nearest hopping and Coulomb repulsion when we approach this level of doping.…”

Section: Discussionmentioning

confidence: 99%

“…Contemporary discussions of observed properties of HTSC are frequently organized around this concept 4,5 . Precise nature of this critical point is still unclear,-different studies relate it to charge density waves 6 , nematic 7 , or antiferromagnetic fluctuations 8 . However, its theoretical treatment can be conducted universally, though it requires a change of basic mathematical tools: the diagrammatic approach, the main apparatus of quantum many-body theory during the last sixty years 9,10 , is not really fitted to the description of systems lacking quasiparticles.…”

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confidence: 99%

Detecting quantum critical points in the t-$$t'$$ Fermi-Hubbard model via complex network theory

Bagrov

Danilov

Brener

et al. 2020

Sci Rep

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A considerable success in phenomenological description of $$\text {high-T}_{\text{c}}$$ high-T c superconductors has been achieved within the paradigm of Quantum Critical Point (QCP)—a parental state of a variety of exotic phases that is characterized by dense entanglement and absence of well-defined quasiparticles. However, the microscopic origin of the critical regime in real materials remains an open question. On the other hand, there is a popular view that a single-band t-$$t'$$ t ′ Hubbard model is the minimal model to catch the main relevant physics of superconducting compounds. Here, we suggest that emergence of the QCP is tightly connected with entanglement in real space and identify its location on the phase diagram of the hole-doped t-$$t'$$ t ′ Hubbard model. To detect the QCP we study a weighted graph of inter-site quantum mutual information within a four-by-four plaquette that is solved by exact diagonalization. We demonstrate that some quantitative characteristics of such a graph, viewed as a complex network, exhibit peculiar behavior around a certain submanifold in the parametric space of the model. This method allows us to overcome difficulties caused by finite size effects and to identify precursors of the transition point even on a small lattice, where long-range asymptotics of correlation functions cannot be accessed.

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Nematic fluctuations in the cuprate superconductor Bi2Sr2CaCu2O8+δ

Cited by 61 publications

References 56 publications

High magnetic field ultrasound study of spin freezing in La1.88Sr0.12CuO4

High magnetic field ultrasound study of spin freezing in La1.88Sr0.12CuO4

Non-Fermi liquid transport in the vicinity of the nematic quantum critical point of superconducting FeSe1−xSx

Detecting quantum critical points in the t-$$t'$$ Fermi-Hubbard model via complex network theory

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