Formation of Incommensurate Charge Density Waves in Cuprates

Miao, H.; Fumagalli, R.; Rossi, Mario E.; Lorenzana, J.; Seibold, G.; Yakhou-Harris, F.; Kummer, K.; Brookes, N. B.; Gu, Genda; Braicovich, L.; Ghiringhelli, G.; Dean, M. P. M.

doi:10.1103/physrevx.9.031042

Cited by 67 publications

(74 citation statements)

References 54 publications

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“…We note that NMR and X-ray studies (primarily of YBa 2 Cu 3 O 7 and La 2 BaCuO 4 ) ( 39 ) appear consistent with SISTM visualizations of incommensurate electronic density modulations (primarily of Bi 2 Sr 2 CaCu 2 O 8 and Ca 2- x Na x CuO 2 Cl 2 ) ( 37 ), and to have a common microscopic cause ( 40 , 41 ). But in our current study, we have compared carefully to atomic scale studies of Bi 2 Sr 2 CaCu 2 O 8 that manifest short-range commensurate periodicity in electronic structure images ( 7 , 9 , 10 , 12 ).…”

Section: Pdw Plus Superconductivity Theory and Other Techniquessupporting

confidence: 65%

Atomic-scale electronic structure of the cuprate pair density wave state coexisting with superconductivity

Choubey

Joo

Fujita

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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The defining characteristic of hole-doped cuprates isd-wave high temperature superconductivity. However, intense theoretical interest is now focused on whether a pair density wave state (PDW) could coexist with cuprate superconductivity [D. F. Agterberg et al.,Annu. Rev. Condens. Matter Phys.11, 231 (2020)]. Here, we use a strong-coupling mean-field theory of cuprates, to model the atomic-scale electronic structure of an eight-unit-cell periodic,d-symmetry form factor, pair density wave (PDW) state coexisting withd-wave superconductivity (DSC). From this PDW + DSC model, the atomically resolved density of Bogoliubov quasiparticle statesNr,Eis predicted at the terminal BiO surface of Bi2Sr2CaCu2O8and compared with high-precision electronic visualization experiments using spectroscopic imaging scanning tunneling microscopy (STM). The PDW + DSC model predictions include the intraunit-cell structure and periodic modulations ofNr,E, the modulations of the coherence peak energyΔpr,and the characteristics of Bogoliubov quasiparticle interference in scattering-wavevector spaceq-space. Consistency between all these predictions and the corresponding experiments indicates that lightly hole-doped Bi2Sr2CaCu2O8does contain a PDW + DSC state. Moreover, in the model the PDW + DSC state becomes unstable to a pure DSC state at a critical hole densityp*, with empirically equivalent phenomena occurring in the experiments. All these results are consistent with a picture in which the cuprate translational symmetry-breaking state is a PDW, the observed charge modulations are its consequence, the antinodal pseudogap is that of the PDW state, and the cuprate critical point atp* ≈ 19% occurs due to disappearance of this PDW.

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Section: Pdw Plus Superconductivity Theory and Other Techniquessupporting

confidence: 65%

Atomic-scale electronic structure of the cuprate pair density wave state coexisting with superconductivity

Choubey

Joo

Fujita

et al. 2020

Proc. Natl. Acad. Sci. U.S.A.

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“…Microscopically, the subtle balance between electron–phonon interaction (EPI) and nested portions of the Fermi surface (singularities in the electronic dielectric function, χ q , at q CDW = 2 k F ) determines the origin and stabilization of the charge periodicities 6 . While the Fermi surface nesting scenario survives for 1D and quasi-1D systems (Peierls transition), its role in higher dimensions remains largely questioned 7 , 8 .…”

Section: Introductionmentioning

confidence: 99%

van der Waals driven anharmonic melting of the 3D charge density wave in VSe2

et al. 2021

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Understanding of charge-density wave (CDW) phases is a main challenge in condensed matter due to their presence in high-Tc superconductors or transition metal dichalcogenides (TMDs). Among TMDs, the origin of the CDW in VSe2 remains highly debated. Here, by means of inelastic x-ray scattering and first-principles calculations, we show that the CDW transition is driven by the collapse at 110 K of an acoustic mode at qCDW = (2.25 0 0.7) r.l.u. The softening starts below 225 K and expands over a wide region of the Brillouin zone, identifying the electron-phonon interaction as the driving force of the CDW. This is supported by our calculations that determine a large momentum-dependence of the electron-phonon matrix-elements that peak at the CDW wave vector. Our first-principles anharmonic calculations reproduce the temperature dependence of the soft mode and the TCDW onset only when considering the out-of-plane van der Waals interactions, which reveal crucial for the melting of the CDW phase.

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“…A step forward in the identification of low energy excitations that might be responsible for the strange-metal behaviour was recently taken by means of resonant X-ray scattering (RXS), performed on Nd 1+x Ba 2−x Cu 3 O 7−δ (NBCO) and YBa 2 Cu 3 O 7−δ (YBCO) thin films 12 . After the first experimental evidence, these excitations have been demonstrated to be a common feature of different families of cuprates, namely HgBa 2 CuO 4+δ 13 , La 2−x Sr x CuO 4 [14][15][16] , La 2−x Ba x CuO 4 17,18 , and La 1.675 Eu 0.2 Sr 0.125 CuO 4 19 , thereby indicating that these excitations may well provide a generic scattering mechanism in all cuprates.…”

mentioning

confidence: 99%

Strange metal behaviour from charge density fluctuations in cuprates

Seibold¹,

Arpaia

Peng

et al. 2021

Commun Phys

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Besides the mechanism responsible for high critical temperature superconductivity, the grand unresolved issue of the cuprates is the occurrence of a strange metallic state above the so-called pseudogap temperature T*. Even though such state has been successfully described within a phenomenological scheme, the so-called Marginal Fermi-Liquid theory, a microscopic explanation is still missing. However, recent resonant X-ray scattering experiments identified a new class of charge density fluctuations characterized by low characteristic energies and short correlation lengths, which are related to the well-known charge density waves. These fluctuations are present over a wide region of the temperature-vs-doping phase diagram and extend well above T*. Here we investigate the consequences of charge density fluctuations on the electron and transport properties and find that they can explain the strange metal phenomenology. Therefore, charge density fluctuations are likely the long-sought microscopic mechanism underlying the peculiarities of the metallic state of cuprates.

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Formation of Incommensurate Charge Density Waves in Cuprates

Cited by 67 publications

References 54 publications

Atomic-scale electronic structure of the cuprate pair density wave state coexisting with superconductivity

Atomic-scale electronic structure of the cuprate pair density wave state coexisting with superconductivity

van der Waals driven anharmonic melting of the 3D charge density wave in VSe2

Strange metal behaviour from charge density fluctuations in cuprates

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