Angle-resolved photoemission spectroscopy study of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>Hg</mml:mi><mml:msub><mml:mi>Ba</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mi>Cu</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mrow><mml:mn>4</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></mml:math>

Vishik, Inna; Barišić, N.; Chan, M. K.; Li, Y.; Xia, Dong; Yu, Guichuan; Zhao, Xudong; Lee, W. S.; Meevasana, W.; Devereaux, T. P.; Greven, M.; Shen, Zhi‐Xun

doi:10.1103/physrevb.89.195141

Cited by 46 publications

(35 citation statements)

References 77 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The ratio ω r /(k B T c ) = 7.9 is the largest value reported for the cuprates [27,28]. Using ∆ SC ≈ 42(2) meV [29,30] for the SC gap amplitude, the ratio ω r /∆ SC ≈ 0.70 (3) is consistent with the value 0.64(4) established for unconventional superconductors [28].…”

supporting

confidence: 75%

“…The resonance weight is linearly related to the reduced binding energy, (ω c − ω r )/ω c , by W r (gµ B ) 2 2π(V 2 β) −1 (ω c − ω r )/ω c , where V is the planar interaction that enhances the bare susceptibility and g = 2 is the Landé factor. The quantities ω c and β are related to the hot-spots (hs), defined as Fermi-surface points connected by q AF : β = 4/(πν hs ν hs+Q AF sin(Θ hs )), where ν hs and ν hs+Q AF are the Fermi velocities at the hot-spots and Θ hs is the angle between their directions; ω c at the hot-spots is estimated as 1.8∆ SC [33], where ∆ SC ≈ 42(2) meV [29,30]. As shown in Fig.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near

et al. 2016

Self Cite

View full text Add to dashboard Cite

supporting

confidence: 75%

mentioning

confidence: 99%

Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near

et al. 2016

Self Cite

View full text Add to dashboard Cite

“…The SC order parameter exhibits a dwave aspect at optimal doping while this aspect is weaken in the underdoped regime. The RES gap dependence is different than a pure d-wave dependence as observed by ARPES in Bi-2212 66 and Hg-1201 67 . From a technical point of view, the calculation of the bare polarization bubbles is done as follow.…”

Section: Resultsmentioning

confidence: 60%

“…Considering, the relation (5), we can deduce the form of the SC order parameter, 66,67 . The resolution of the self-consistency equation deriving from the minimal model is left for a forthcoming publication.…”

Section: A the Res Minimal Modelmentioning

confidence: 99%

Model for the neutron resonance in HgBa2CuO4+δ

Montiel

Pépin

2017

Phys. Rev. B

View full text Add to dashboard Cite

We study the spin dynamics of the Resonant Excitonic State (RES) proposed, within the theory of an emergent SU(2) symmetry, to explain some properties of the pseudo-gap phase of cuprate superconductors. The RES can be described as a proliferation of particle-hole patches with an internal modulated structure. We model the RES modes as a charge order with multiple 2p F ordering vectors, where 2pF connects two opposite side of the Fermi surface. This simple modelization enables us to propose a comprehensive study of the collective mode observed at the antiferromagnetic (AF) wave vector Q = (π, π) by Inelastic Neutron Scattering (INS) in both superconducting state (SC), but also in the Pseudo-Gap regime. In this regime, we show that the dynamic spin susceptibility accuses a loss of coherence terms except at special wave vectors commensurate with the lattice. We argue that this phenomenon could explain the change of the spin response shape around Q. We demonstrate that the hole dependence of the RES spin dynamics is in agreement with the experimental data in HgBa2CuO 4+δ .

show abstract

“…[20]. So far, the obtained results have been interpreted in the framework of the two different approaches.…”

mentioning

confidence: 99%

Anisotropy of the gap parameter in the hole-doped cuprates

Szczȩśniak¹,

Durajski²

2014

Supercond. Sci. Technol.

View full text Add to dashboard Cite

The structure of the gap parameter (∆ k ) for the hole-doped cuprates has been studied. The obtained results indicate that the antinodal part of ∆ k is very weakly temperature dependent and above the critical temperature (TC), it extends into the anomalous normal state to the pseudogap temperature. On the other hand, the values of ∆ k , which are close to the nodal part, are strongly temperature dependent. The model has been tested for the YBa2Cu3O 7−δ superconductor. It has been shown that the theoretical results agree with the experimental data.Keywords: High-temperature superconductors; Anisotropy; Energy gap. [20]. So far, the obtained results have been interpreted in the framework of the two different approaches.In the first case, the difference between the doping and temperature dependence of the gap in the nodal and antinodal region suggests that the pseudogap and the superconducting gap are independent [21], [22]. Additional support comes from the strong deviation from the standard d-wave form of the energy gap in the underdoped region. The above fact is interpreted as composition of the d-wave superconducting gap and the remnant pseudogap [23], [24].In the second case, the pseudogap is considered as the precursor of the superconducting gap [25], [26]. The d-wave symmetry deviation in the underdoped region is connected with the existence of the high-harmonic pairing terms [27].In the presented paper, we have studied the anisotropy of the gap parameter for the hole-doped superconductors in the framework of the recently introduced theory [28], [29].Our main purpose was to derivation the thermodynamic equation for the anomalous thermal average, which determines the structure of the gap parameter. Next, the temperature dependence of the nodal and the antinodal part of the energy gap has been calculated. We have assumed that the theory should be simple enough as far as possible. However, the good agreement between the theoretical predictions and the experimental results has been also required.The model is based on three postulates: (i) In the superconductivity domain of the cuprates the fundamental role is played by the electrons on the CuO 2 planes. (ii) The conventional electron-phonon (EPH) interaction exists in the cuprates, which does not have to be strong. (iii) Strong electronic correlations exist in the cuprates, but the electron-electron scattering in the superconductivity domain is inseparably connected with absorption or emission of the vibrational quanta.The first postulate emphasizes the importance of the quasi two-dimensionality of the system. The second one refers to the classical pairing mechanism given by Fröhlich [30], [31]. The third postulate states that the strong electron correlations in the cuprates are inseparably coupled with the phonon subsystem. The first two postulates define the van Hove scenario [32], [33]. The third postulate requires further discussion because it is far more subtle. In particular, it should be noted that the postulated electron correlations generalize the Hubb...

show abstract

Angle-resolved photoemission spectroscopy study ofHgBa2CuO4+δ

Cited by 46 publications

References 77 publications

Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near

Hourglass Dispersion and Resonance of Magnetic Excitations in the Superconducting State of the Single-Layer Cuprate HgBa2CuO4+δ Near

Model for the neutron resonance in HgBa2CuO4+δ

Anisotropy of the gap parameter in the hole-doped cuprates

Contact Info

Product

Resources

About