Self-energy renormalization around the flux phase in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>t</mml:mi><mml:mtext>−</mml:mtext><mml:mi>J</mml:mi></mml:mrow></mml:math>model: Possible implications in underdoped cuprates

Greco, A.

doi:10.1103/physrevb.77.092503

Cited by 8 publications

(20 citation statements)

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“…This figure shows a crossover (double dashed dotted line) from a region of low intensity at low doping and high temperature to a region of high intensity at large doping and low temperature. 35 As in Ref. [76] we identify the former region with an incoherent metal where the QP peak is broad, whereas in the latter region the QP is well defined as expected for a coherent metal.…”

Section: -75mentioning

confidence: 94%

“…32 These self-energy effects were recently confronted with experiments in the normal state, such as angle-dependent magnetoresistance (ADMR) 33 and ARPES, [34][35][36][37][38] after which they show qualitative agreement. We have shown that several aspects related to the Fermi arc phenomenology and ADMR features can be described considering self-energy effects near the FP instability.…”

Section: 30mentioning

confidence: 99%

“…At dopings and temperatures near the FP instability, the most important contribution to the selfenergy can be obtained after projecting Σ(k, ω) on the FP eigenvector v . The obtained self-energy is 34,35 Im…”

Section: Self-energy Fluctuations Above Tf Pmentioning

confidence: 99%

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Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature

et al. 2014

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Hole doped cuprates show a superconducting critical temperature Tc which follows an universal dome-shaped behavior as function of doping. It is believed that the origin of superconductivity in cuprates is entangled with the physics of the pseudogap phase. An open discussion is whether the source of superconductivity is the same that causes the pseudogap properties. The t-J model treated in large-N expansion shows d-wave superconductivity triggered by non-retarded interactions, and an instability of the paramagnetic state to a flux phase or d-wave charge density wave (d-CDW) state. In this paper we show that self-energy effects near d-CDW instability may lead to a dome-shaped behavior of Tc. In addition, it is also shown that these self-energy contributions may describe several properties observed in the pseudogap phase. In this picture, although fluctuations responsible for the pseudogap properties leads to a dome-shaped behavior, they are not involved in pairing which is mainly non-retarded.

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Section: -75mentioning

confidence: 94%

Section: 30mentioning

confidence: 99%

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Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature

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“…However, as discussed in Ref. 9 and summarized below, the relevant contributions to ⌺͑k , ͒ can be written as Im ⌺͑k,͒ = Im ⌺ R ͑k,͒ + Im ⌺ flux ͑k,͒ ͑5͒…”

Section: Summary Of the Formalism: Inelastic Scattering Ratementioning

confidence: 99%

Two distinct quasiparticle inelastic scattering rates in thet−Jmodel and their relevance for high-Tccuprate superconductors

Buzon

Greco

2010

Phys. Rev. B

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The recent findings about two distinct quasiparticle inelastic scattering rates in angle-dependent magnetoresistance ͑ADMR͒ experiments in overdoped high-T c cuprates superconductors have motivated many discussions related to the link between superconductivity, pseudogap, and transport properties in these materials. After computing dynamical self-energy corrections in the framework of the t-J model, the inelastic scattering rate was introduced as usual. Two distinct scattering rates were obtained showing the main features observed in ADMR experiments. Predictions for underdoped cuprates are discussed. The implications of these two scattering rates on the resistivity were also studied as a function of doping and temperature and confronted with experimental measurements.

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“…[7] and [8] can be discussed in the framework of Refs. [11], [12], and [13] showing that a theory where the PG phase is distinct from SC and associated with short-range fluctuations in the proximity to a symmetry breaking instability is consistent with the experiment.…”

Section: Andrés Greco and Matías Bejasmentioning

confidence: 58%

Short-ranged and short-lived charge-density-wave order and pseudogap features in underdoped cuprate superconductors

Greco

Bejas

2011

Phys. Rev. B

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The pseudogap phase of high-Tc cuprates is controversially attributed to preformed pairs or to a phase which coexists and competes with superconductivity. One of the challenges is to develop theoretical and experimental studies in order to distinguish between both proposals. Very recently, researchers at Stanford have reported [M. Hashimoto et al., Nat. Phys. 6, 414 (2010); R.-H. He et al., Science 331, 1579 (2011)] angle-resolved photoemission spectroscopy experiments on Pb-Bi2201 supporting the point of view that the pseudogap is distinct from superconductivity and associated to a spacial symmetry breaking without long-range order. In this paper we show that many features reported by these experiments can be described in the framework of the t-J model considering self-energy effects in the proximity to a d charge-density-wave instability.PACS numbers: 74.25.Jb, 71.10.Fd, Although the solid state physics community agrees on the existence of the pseudogap (PG) phase in underdoped high-T c superconductors, the origin of the PG and its relation with superconductivity (SC) is not clear from experimental and theoretical studies. Interpretations run from descriptions where the PG is intimately related to SC to others where the PG is distinct from SC and both phases compete.1 Thus, experimental and theoretical studies are of central interest for solving this puzzle.Angle-resolved photoemission spectroscopy (ARPES) is a valuable tool for studying the PG phase.2 In the pseudogap phase ARPES experiments show, in the normal state below a characteristic temperature T * , Fermi arcs 3-6 (FAs) (centered along the zone diagonal) instead of the expected Fermi surface (FS). Despite the general consensus about the existence of FAs, their main characteristics are controversial. Some experiments 3,4 report that near the antinode exists a single gap which is nearly independent of temperature. Moreover, in the superconducting state the gap follows the expected d-wave behavior along the FS. In contrast, other experiments 5,6 show that the gap follows the d-wave behavior near the node but deviates upward approaching the antinode. In our opinion the difference in the spectra reported by different groups can not only be attributed to the different systems under study. For instance, similar samples at similar doping (see Refs.[4] and [5]) also show the mentioned discrepancy. Although the reason for these differences is not clear, results of Refs. [3] and [4] suggest that FAs are tied to the preformed pair scenario, while results from Refs.[5] and [6] claim that arcs are associated to an order which is distinct from SC.Recently, ARPES results on Pb-Bi2201 were reported (Refs. [7] and [8]) showing that the PG phase is distinct from SC and associated to a spacial symmetry breaking without long-range order. Since these experiments challenge scenarios about the origin of the PG and FAs, their theoretical support is of high and broad interest. In the framework of the t-J model at mean-field level the carriers show a band dispersion′ and J are...

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Self-energy renormalization around the flux phase in thet−Jmodel: Possible implications in underdoped cuprates

Cited by 8 publications

References 36 publications

Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature

Self-energy effects in cuprates and the dome-shaped behavior of the superconducting critical temperature

Two distinct quasiparticle inelastic scattering rates in thet−Jmodel and their relevance for high-Tccuprate superconductors

Short-ranged and short-lived charge-density-wave order and pseudogap features in underdoped cuprate superconductors

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