Strictly In-Plane Vortex-like Excitations in Pseudogap Region of Underdoped $L{a}_{2-x}S{r}_{x}Cu{O}_4$ Single Crystals

Abstract

Nernst effect has been measured for an underdoped and an optimally doped $L{a}_{2-x}S{r}_{x}Cu{O}_4$ single crystal with the magnetic field applied along different directions. For both samples, when $H\Vert$ c, a significant Nernst voltage appears above $T_c$ and keeps measurable up to a high temperature (100 K) as reported by Xu et al.[ Nature 406, 486(2000) ]. However, when $H\Vert$ a-b plane the Nernst signal drops below the noise level quickly above $T_c$ for the underdoped sample. Moreover, the in-plane Nernst data with field at different angles shows a nice scaling behavior with the c-axis component of the field. All these give strong indication for strictly in-plane vortex-like excitations in pseudo-gap region.

arXiv comment5 Pages, 4 Figures, Revised Feb.4, 2003

References in corpus (9)

• Hidden Order in the Cuprates
• Spin-Gap Proximity Effect Mechanism of High Temperature Superconductivity
• Vanishing of phase coherence in underdoped Bi_2Sr_2CaCu_2O_8+d
• 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 Magnetic Excitation Spectrum and Thermodynamics of High-$T_c$ Superconductors
• Signature of Superfluid Density in the Single-Particle Excitation Spectrum of Bi2Sr2CaCu2O8+delta
• The high-field phase diagram of the cuprates derived from the Nernst effect
• Do electrons change their c-axis kinetic energy upon entering the superconducting state?
• The phase transition in QCD with broken SU(2) flavour symmetry

Cited by in corpus (13)

• The Nernst effect in high-$T_c$ superconductors
• The Nernst effect and the boundaries of the Fermi liquid picture
• Observation of the Nernst signal generated by fluctuating Cooper pairs
• Giant Nernst Effect due to Fluctuating Cooper Pairs in Superconductors
• Strongly nonlinear magnetization above $T_c$ in $\mathrm{B}{\mathrm{i}}_2\mathrm{S}{\mathrm{r}}_2\mathrm{CaC}{\mathrm{u}}_2{\mathrm{O}}_{8+\delta }$
• Nernst effect, quasiparticles, and d-density waves in cuprates
• Total suppression of superconductivity by high magnetic fields in YBa2 Cu3O6.6
• Spin Hall effect in a Doped Mott Insulator
• Lower Pseudogap Phase: A Spin/Vortex Liquid State
• On the interpretation of the Nernst effect measurements in the cuprates
• Doping dependence of the vortex glass and sublimation transitions in the high-$T_c$ superconductor La${}_{2-x}$Sr${}_x$CuO${}_4$ as determined from macroscopic measurements
• Manipulating vortex motion by thermal and Lorentz force in high temperature superconductors
• Anomalous mesoscopic kinetics in disordered superconductors