Vertical temperature boundary of the pseudogap under the superconducting dome in the phase diagram of $Bi_2$$Sr_2$$CaCu_2$$O_{8+\delta}$

B. Loret 1, 2 S. Sakai 3, 4 S. Benhabib 1 Y. Gallais 5 M. Cazayous 1 M Méasson 1 R Zhong 6 J. Schneeloch 6 G Gu 6 A. Forget 2 D. Colson 2 I. Paul 1 M. Civelli 7 A. Sacuto 5
1 MPQ - Matériaux et Phénomènes Quantiques
2 LNO - Laboratoire Nano-Magnétisme et Oxydes
SPEC - UMR3680 - Service de physique de l'état condensé, IRAMIS - Institut Rayonnement Matière de Saclay
3 Department of Environmental Science
4 CSRS - RIKEN Center for Sustainable Resource Science
5 LSLP - Laboratoire de Spectroscopie en Lumière Polarisée
6 Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory
7 LPS - Laboratoire de Physique des Solides
Abstract : Combining electronic Raman scattering experiments with cellular dynamical mean field theory, we present evidence of the pseudogap in the superconducting state of various hole-doped cuprates. In $Bi_2$$Sr_2$$CaCu_2$$O_{8+\delta}$ we track the superconducting pseudogap hallmark, a peak-dip feature, as a function of temperature $T$ and doping $p$, well beyond the optimal one. We show that, at all temperatures under the superconducting dome, the pseudogap disappears at the doping $p_c$, between 0.222 and 0.226, where also the normal-state pseudogap collapses at a Lifshitz transition. This demonstrates that the superconducting pseudogap boundary forms a vertical line in the $T-p$ phase diagram.
Keywords : 7462Dh 7425nd numbers: 7472Gh 7472Kf
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Article dans une revue
Physical Review B : Condensed matter and materials physics, American Physical Society, 2017, 96, pp.094525 〈10.1103/PhysRevB.96.094525〉
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B. Loret, S. Sakai, S. Benhabib, Y. Gallais, M. Cazayous, et al.. Vertical temperature boundary of the pseudogap under the superconducting dome in the phase diagram of $Bi_2$$Sr_2$$CaCu_2$$O_{8+\delta}$. Physical Review B : Condensed matter and materials physics, American Physical Society, 2017, 96, pp.094525 〈10.1103/PhysRevB.96.094525〉. 〈cea-01633959〉

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