Anomalous dissipation in the mixed state of underdoped cuprates close to the superconductor-insulator boundary

2002/12/19 by C. Capan, K. Behnia, Kamran Behnia +5 · 24 citations
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cuprate #Dissipation #Electrical resistivity and conductivity #Insulator (electricity) #Magnetic and transport properties of perovskites and related materials #Materials science #Nernst effect #Nernst equation #Physics #Physics of Superconductivity and Magnetism #Quantum mechanics #Superconductivity #Thermodynamics #Vortex #cond-mat.str-el #cond-mat.supr-con

paper · pdf · doi:10.1103/physrevb.67.100507

published in Physical review. B, Condensed matter 67(10) (American Physical Society) · 5 pages including 3 figures

arxiv created 2002/12/19 · openalex publication_date 2003/03/28 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We present a comparative study of Nernst effect and resistivity in underdoped samples of Bi₂Sr₂CuO_6+\ensuremathδ and La_2\ensuremath-xSr_xCuO₄. The Nernst effect presents a peak in a region of the H\ensuremath-T diagram where resistivity shows a nonmetallic temperature dependence. Our results illustrate that the mechanism of dissipation in the mixed state of underdoped cuprates is poorly understood. Large quantum superconducting fluctuations and vanishing vortex viscosity are among suggested explanations for an enhanced Nernst signal close to the superconductor-insulator boundary.

Citations

• Onset of the vortexlike Nernst signal aboveTcinLa2−xSrxCuO4andBi2Sr2−yLayCuO6
• Entropy of Vortex Cores Near the Superconductor-Insulator Transition in an Underdoped Cuprate
• Chiral symmetry breaking and phase fluctuations: AQED3theory of the pseudogap state in cuprate superconductors
• Metal-to-Insulator Crossover in the Low-Temperature Normal State ofBi2Sr2−xLaxCuO6+δ

Cited by

• Nernst Effect and Disorder in the Normal State of High-TcCuprates