Raman and ARPES combined study on the connection between the existence of the pseudogap and the topology of the Fermi surface in 
<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:msub><mml:mi>Bi</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>Sr</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>CaCu</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mrow><mml:mn>8</mml:mn><mml:mo>+</mml:mo><mml:mi>δ</mml:mi></mml:mrow></mml:msub></m

Loret, B.; Gallais, Yann; Cazayous, M.; Zhong, Ruidan; Schneeloch, John; Gu, Genda; Fedorov, Alexander; Kim, T. K.; Борисенко, С. В.; Sacuto, A.

doi:10.1103/physrevb.97.174521

Cited by 16 publications

(20 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Theoretically, such an instability was indeed shown to be relevant to the cuprates close to doping levels where the density of states passes through a van Hove singularity (vHs) at the (, 0) and equivalent points of the Brillouin zone 43–45 . This is consistent with our results since = 0.22 corresponds to the doping level where one of the Fermi surface sheets of Bi2212 changes from electron-like to hole-like, and passes through a van Hove singularity (vHs) at (, 0) 29,36 . The link between the nematic instability and the closeness of the vHs singularity also naturally explains the non-monotonic behavior of as a function of doping, which is also found in mean field theories of vHs induced nematicity 46,47 .…”

Section: Discussionsupporting

confidence: 93%

“…1c is displayed the evolution of the normal state Raman spectrum in the symmetry as a function of doping. From previous Raman studies, OD60 ( T = 60K) sample lies very close to the termination point of the PG, p 0.22 and no signature of PG is seen for OD60, OD55 ( T = 55K), and OD52 ( T = 52K) compositions 36 . Other samples, OD74 ( T = 74K), OD80 ( T = 80K), and UD85 ( T = 85K) display PG behavior.…”

Section: Resultsmentioning

confidence: 75%

“…We present Raman scattering measurements on 6 single crystals of the cuprate (Bi2212) covering a doping range between p = 0.12 and p = 0.23. A particular emphasis was put in the doping region bracketing p close to where the PG was shown to terminate, i.e., between p = 0.20 and p = 0.23 29–36 . At these dopings a relatively wide temperature range is accessible above both and to probe these fluctuations, and look for fingerprints of a nematic QCP.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Nematic fluctuations in the cuprate superconductor Bi2Sr2CaCu2O8+δ

et al. 2019

Self Cite

View full text Add to dashboard Cite

Establishing the presence and the nature of a quantum critical point in their phase diagram is a central enigma of the high-temperature superconducting cuprates. It could explain their pseudogap and strange metal phases, and ultimately their high superconducting temperatures. Yet, while solid evidences exist in several unconventional superconductors of ubiquitous critical fluctuations associated to a quantum critical point, in the cuprates they remain undetected until now. Here using symmetry-resolved electronic Raman scattering in the cuprate , we report the observation of enhanced electronic nematic fluctuations near the endpoint of the pseudogap phase. While our data hint at the possible presence of an incipient nematic quantum critical point, the doping dependence of the nematic fluctuations deviates significantly from a canonical quantum critical scenario. The observed nematic instability rather appears to be tied to the presence of a van Hove singularity in the band structure.

show abstract

Section: Discussionsupporting

confidence: 93%

Section: Resultsmentioning

confidence: 75%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Nematic fluctuations in the cuprate superconductor Bi2Sr2CaCu2O8+δ

et al. 2019

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the cuprates Raman scattering has been used extensively to track the energy scales of the phonons, the magnetic excitations, the superconducting gap, the pseudogap [31][32][33][34][35][36][37][38][39] or more recently the charge density wave gap [40][41][42]. Since Raman is a two photon scattering process, by controlling the incoming and outgoing photon polarizations, one can selectively probe both the lattice and the electronic excitations in different symme- tries.…”

Section: Introductionmentioning

confidence: 99%

Exploration of the Hg-based cuprate superconductors by Raman spectroscopy under hydrostatic pressure

Auvray,

Loret,

Chibani

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

The superconducting phase of the HgBa 2 CuO 4+δ (Hg-1201) and HgBa 2 Ca2Cu3O 8+δ (Hg-1223) cuprates has been investigated by Raman spectroscopy under hydrostatic pressure. Our analysis reveals that the increase of Tc with pressure is slower in Hg-1223 cuprate compared to the Hg-1201 due to a charge carrier concentration imbalance accentuated by pressure in Hg-1223. We find that the energy variation under pressure of the apical oxygen mode from which the charge carriers are transferred to the CuO2 layer, is the same for both the Hg-1223 and Hg-1223 cuprates and it is controlled by the inter-layer compressibility. At last, we show that the binding energy of the Cooper pairs related to the maximum amplitude of the d− wave superconducting gap at the anti-nodes, does not follow Tc with pressure. It decreases while Tc increases. In the particular case of Hg-1201, the binding energy collapses from 10 to 2 KBTc as the pressure increases up to 10 GPa. These direct spectroscopic observations joined to the fact that the binding energy of the Cooper pairs at the anti-nodes does not follow Tc either with doping, raises the question of its link with the pseudogap energy scale which follows the same trend with doping.

show abstract

“…In order to address these key questions, we have explored the doping dependencies of the underlying energy scales associated with the transition temperatures which constitute the cuprate phase diagram. The electronic Raman spectroscopy (ERS) appeared as a very effective probe to track the energy scales of the cuprates phase diagram whether for the detection of the superconducting gap, the pseudogap [2][3][4][5][6][7][8][9][10] or more recently the charge density wave gap [11]. Indeed, the ERS is an energy-resolved and momentum averaged probe, it is therefore quite sensitive to any kind of gap opening without being blurred by the momentum variations [12].…”

Section: Introductionmentioning

confidence: 99%

Universal relationship between the energy scales of the pseudogap phase, the superconducting state and the charge density wave order in copper oxide superconductors

Loret,

Auvray,

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

We report the hole doping dependencies of the pseudogap phase energy scale, 2∆PG, the antinodal (nodal) superconducting energy scales 2∆ AN SC (2∆ N SC ) and the charge density wave energy scale, 2∆CDW. They have been extracted from the electronic Raman responses of distinct copper oxide families. For all the cuprates studied, we reveal universal doping dependencies which suggest that 2∆PG, 2∆ AN SC and 2∆CDW are governed by common microscopic interactions and that these interactions become relevant well above the superconducting transition at Tc . In sharp contrast, 2∆ N SC tracks the doping dependence of Tc , appearing to be controlled by a different kind of interactions than the energy scales above.

show abstract

Raman and ARPES combined study on the connection between the existence of the pseudogap and the topology of the Fermi surface in Bi2Sr2CaCu2O8+δ

Cited by 16 publications

References 50 publications

Nematic fluctuations in the cuprate superconductor Bi2Sr2CaCu2O8+δ

Nematic fluctuations in the cuprate superconductor Bi2Sr2CaCu2O8+δ

Exploration of the Hg-based cuprate superconductors by Raman spectroscopy under hydrostatic pressure

Universal relationship between the energy scales of the pseudogap phase, the superconducting state and the charge density wave order in copper oxide superconductors

Contact Info

Product

Resources

About