Doping dependence of the gap anisotropy inLa2−xCexCuO4studied by millimeter-wave spectroscopy

2003/06/24 by A. V. Pronin, A. Pimenov, A. Loidl +2 · 1 citation
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Anisotropy #Condensed matter physics #Doping #Iron-based superconductors research #Materials science #Optics #Penetration depth #Physics #Physics of Superconductivity and Magnetism #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.68.054511

published as Phys. Rev. B 68, 054511 (2003) · 4 pages, 4 figures

arxiv created 2003/06/24 · openalex publication_date 2003/08/07 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We measure the penetration depth of optimally doped and underdoped La_2\ensuremath-xCe_xCuO₄ in the millimeter frequency domain (4--7 cm^\mathrm\ensuremath-1) and for temperatures 2K<~T<~300K. The penetration depth as a function of temperature reveals significant changes on electron doping. It shows quadratic temperature dependence in underdoped samples, but increases almost exponentially at optimal doping. Significant changes in the gap anisotropy (or even in the gap symmetry) may account for this transition.

Citations

• Evidence for a Transition in the Pairing Symmetry of the Electron-Doped CupratesLa2−xCexCuO4−yandPr2−xCexCuO4−y
• Incipient Nodal Pairing in Planard-wave Superconductors
• Local and macroscopic tunneling spectroscopy ofY1−xCaxBa2Cu3O7−δfilms: Evidence for a doping-dependentisoridxycomponent in the order parameter
• Evidence of Doping-Dependent Pairing Symmetry in Cuprate Superconductors
• Global trends in the interplane penetration depth of layered superconductors
• Quantum Phase Transitions ind-Wave Superconductors

Cited by

• Progress and perspectives on electron-doped cuprates