Distribution of charge carriers at strong electron–phonon interaction and “vertical dispersion” in ARPES spectra of cuprates

Myasnikova, A. E.; Myasnikov, E. N.; Moseykin, D. V.; Zuev, I. S.

doi:10.1016/j.physleta.2014.10.051

Cited by 4 publications

(35 citation statements)

References 35 publications

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“…Thus, ASs can be characterized by their center position, different carrier states take place when the distance between the AS centers is larger than the AS diameter. The binding energy per carrier in large bipolaron calculated with taking into account carrier correlation is close to that in LP [14], therefore the ground state of the system with strong Frohlich EPI at low doping can be either polarons or bipolarons. At higher carrier concentrations it is a system of bipolarons [14].…”

Section: A Model Of System With Strong Electron Correlations and Stromentioning

confidence: 56%

“…The carrier momentum in LP and in large bipolaron has large uncertainty 0 k  tied with the polaron volume V 0 (the large polaron and bipolaron have close volumes [14]) by the uncertainty relation:…”

Section: A Model Of System With Strong Electron Correlations and Stromentioning

confidence: 99%

“…Simultaneous presence of broad Gaussian bands and "vertical dispersion" emerges in a model with strong long-range (Frohlich) EPI [14] favoring large polarons (LP) [15]. But to obtain the ARPES spectrum features being in quantitative agreement with the experiments on cuprates simultaneous taking into account carriers correlations and strong Frohlich EPI is necessary.…”

Section: Introductionmentioning

confidence: 99%

“…The main difference of systems with strong Frohlich EPI is coexistence of autolocalized and delocalized carriers occurring at sufficiently high carrier concentration [14]. As a result translational degeneracy of the ground state characteristic for the autolocalized state (AS) of the carrier [17] is removed and electron subsystem participates in the relaxation after photoemission.…”

Section: Introductionmentioning

confidence: 99%

“…As a result translational degeneracy of the ground state characteristic for the autolocalized state (AS) of the carrier [17] is removed and electron subsystem participates in the relaxation after photoemission. The relaxation pathways are different at photoemission from AS and from delocalized state (DS), and according to Pauli exclusion rule ASs and DSs occupy different regions in the momentum space [14]. Therefore the coexistence of autolocalized and delocalized carriers displays itself in ARPES spectrum as presence of "vertical dispersion" universally observed in superconducting cuprates [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Relaxation of strongly coupled electron and phonon fields after photoemission and high-energy part of ARPES spectra of cuprates

Myasnikova

Zhileeva²,

Moseykin³

2018

J. Phys.: Condens. Matter

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An approach to considering systems with a high concentration of correlated carriers and strong long-range electron-phonon interaction and to calculating the high-energy part of the angle-resolved photoemission spectroscopy (ARPES) spectra of such systems is suggested. Joint relaxation of strongly coupled fields-a field of correlated electrons and phonon field-after photoemission is studied to clarify the nature of characteristic features observed in the high-energy part of the ARPES spectra of cuprate superconductors. Such relaxation occurs in systems with strong predominantly long-range electron-phonon interaction at sufficiently high carrier concentration due to the coexistence of autolocalized and delocalized carriers. A simple method to calculate analytically a high-energy part of the ARPES spectrum arising is proposed. It takes advantage of using the coherent states basis for the phonon field in the polaron and bipolaron states. The approach suggested yields all the high-energy spectral features like broad Gaussian band and regions of 'vertical dispersion' being in good quantitative agreement with the experiments on cuprates at any doping with both types of carriers. Demonstrated coexistence of autolocalized and delocalized carriers in superconducting cuprates changes the idea about their ground state above the superconducting transition temperature that is important for understanding transport and magnetic properties. High density of large-radius autolocalized carriers revealed may be a key to the explanation of charge ordering in doped cuprates.

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Section: A Model Of System With Strong Electron Correlations and Stromentioning

confidence: 56%

Section: A Model Of System With Strong Electron Correlations and Stromentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Relaxation of strongly coupled electron and phonon fields after photoemission and high-energy part of ARPES spectra of cuprates

Myasnikova

Zhileeva²,

Moseykin³

2018

J. Phys.: Condens. Matter

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Topological pseudogap in highly polarizable layered systems with 2D hole-like dispersion

Doronkina

Myasnikova

Dzhantemirov

et al. 2022

Physica E: Low-dimensional Systems and Nanostructures

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Strong long-range electron–phonon interaction as possible driving force for charge ordering in cuprates

Myasnikova

Nazdracheva²,

Lutsenko³

et al. 2019

J. Phys.: Condens. Matter

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A model resulting in charge ordering (CO) similar to that observed in cuprate superconductors is under study. It includes strong long-range electron-phonon interaction (EPI) and high density of correlated carriers. Coexistence of large bipolarons and delocalized carriers is a feature of such system. We develop generalized variation method to calculate the bipolaron size (CO period) in the ground normal state of such system at various doping. The approach allows the revealing of a possible physical reason of strongly different doping behavior of the CO wave vector in different cuprates. Obtained doping dependences of the CO period and temperature of the CO decay demonstrate quantitative agreement with those observed in cuprates. Predicted in the suggested approach ratio of the CO wave vector to the wave vector of the high-energy anomaly (HEA) in ARPES spectrum is in consent with that in cuprates. Calculated resonant x-rays scattering on the CO emerging in the model is in good agreement with experiments on cuprates including the asymmetry of the CO peaks' cross-section. A gap arises in the spectrum of delocalized carriers near antinodal direction due to their scattering on the periodic potential created by autolocalized carriers, analogously to photon crystal effect.

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Distribution of charge carriers at strong electron–phonon interaction and “vertical dispersion” in ARPES spectra of cuprates

Cited by 4 publications

References 35 publications

Relaxation of strongly coupled electron and phonon fields after photoemission and high-energy part of ARPES spectra of cuprates

Relaxation of strongly coupled electron and phonon fields after photoemission and high-energy part of ARPES spectra of cuprates

Topological pseudogap in highly polarizable layered systems with 2D hole-like dispersion

Strong long-range electron–phonon interaction as possible driving force for charge ordering in cuprates

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