Effect of pseudogap on electronic anisotropy in the strain dependence of the superconducting Tc of underdoped YBa2Cu3Oy - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter (1978-1997) Année : 2022

Effect of pseudogap on electronic anisotropy in the strain dependence of the superconducting Tc of underdoped YBa2Cu3Oy

M. Frachet
  • Fonction : Auteur
D. J. Campbell
  • Fonction : Auteur
A. Missiaen
  • Fonction : Auteur
S. Benhabib
F. Laliberté
  • Fonction : Auteur
B. Borgnic
  • Fonction : Auteur
T. Loew
  • Fonction : Auteur
J. Porras
  • Fonction : Auteur
S. Nakata
  • Fonction : Auteur
B. Keimer
  • Fonction : Auteur
M. Le Tacon
  • Fonction : Auteur

Résumé

Using ultrasound measurements on detwinned single crystals of underdoped YBa$_2$Cu$_3$O$_y$ (YBCO) we study the hole doping ($p$) evolution of the thermodynamic anisotropy obtained by comparing the strain dependence of superconducting $T_{\rm c}$ along the $a$ and $b$ crystallographic directions. While the structural orthorhombicity of YBCO reduces monotonically with decreasing $p<0.16$, we find that the thermodynamic anisotropy shows an intriguing enhancement at intermediate doping level of electronic origin. Our theoretical analysis shows that the enhancement of the electronic anisotropy can be related to the pseudogap potential that itself increases when the Mott insulating state is approached. Our results imply that the pseudogap is controlled by a local energy scale that can be tuned by varying the nearest neighbor Cu-Cu bond length. Our work opens the possibility to strain engineer the pseudogap potential to enhance the superconducting $T_{\rm c}$.
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Dates et versions

hal-03251322 , version 1 (07-06-2021)

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Citer

M. Frachet, D. J. Campbell, A. Missiaen, S. Benhabib, F. Laliberté, et al.. Effect of pseudogap on electronic anisotropy in the strain dependence of the superconducting Tc of underdoped YBa2Cu3Oy. Physical Review B: Condensed Matter (1978-1997), 2022, ⟨10.1103/PhysRevB.105.045110⟩. ⟨hal-03251322⟩
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