Fluctuation Effects in Underdoped Cuprate Superconductors under Magnetic Field

Abstract

Fluctuation effects in underdoped cuprates under high fields are examined by trying to fit theoretical results to resistivity and Nernst data in vortex states. The superconducting (SC) fluctuation in underdoped cuprates includes not only the ordinary thermal contribution but also a large amount of quantum dynamical contributions. Together with this, the presence of a SC pseudogap region T_0-T_{c0} increasing with underdoping is found to be the origin of the Nernst coefficient becoming anomalously smaller and the in-plane coherence length {\it apparently} increasing with underdoping.

4 pages, 4 figures

References in corpus (6)

• The onset of the vortex-like Nernst signal above Tc in La_{2-x}Sr_xCuO_4 and Bi_2Sr_{2-y}La_yCuO_6
• The high-field phase diagram of the cuprates derived from the Nernst effect
• Entropy of vortex cores on the border of the superconductor-to-insulator transition in an underdoped cuprate
• Magnetoresistance of Untwinned YBa_{2}Cu_{3}O_{y} Single Crystals in a Wide Range of Doping: Anomalous Hole-Doping Dependence of the Coherence Length
• Possible pseudogap behavior of electron doped high-temperature superconductors
• Theoretical Description of Resistive Behavior near a Quantum Vortex-Glass Transition

Cited by in corpus (10)

• Theory of Superconductivity in Strongly Correlated Electron Systems
• Nernst effect and disorder in the normal state of high-T_{c} cuprates
• Total suppression of superconductivity by high magnetic fields in YBa2 Cu3O6.6
• Normal State Nernst Effect in Electron-doped Pr2-xCexCuO4: Superconducting Fluctuations and Two-band Transport
• Critical field in a model with local pairs
• Anomalous dissipation in the mixed state of underdoped cuprates close to the superconductor-insulator boundary
• Effects of proximity to an electronic topological transition on normal state transport properties of the high-Tc superconductors
• Quantum Resistive Behaviors in the Vortex Liquid Regimes at Finite Temperatures
• Unscaling Superconducting Parameters with $T_c$ for Bi-2212 and Bi-2223: A Magnetotransport Study in the Superconductive Fluctuation Regime
• Enhanced superconducting-fluctuation effects on thermodynamic properties in BCS-BEC-crossover regime