Zooming on the Quantum Critical Point in Nd-LSCO
arXiv:0909.4218 · doi:10.1016/j.physc.2009.11.073
Abstract
Recent studies of the high-Tc superconductor La_(1.6-x)Nd_(0.4)Sr_(x)CuO_(4) (Nd-LSCO) have found a linear-T in-plane resistivity rho_(ab) and a logarithmic temperature dependence of the thermopower S / T at a hole doping p = 0.24, and a Fermi-surface reconstruction just below p = 0.24 [1, 2]. These are typical signatures of a quantum critical point (QCP). Here we report data on the c-axis resistivity rho_(c)(T) of Nd-LSCO measured as a function of temperature near this QCP, in a magnetic field large enough to entirely suppress superconductivity. Like rho_(ab), rho_(c) shows an upturn at low temperature, a signature of Fermi surface reconstruction caused by stripe order. Tracking the height of the upturn as it decreases with doping enables us to pin down the precise location of the QCP where stripe order ends, at p* = 0.235 +- 0.005. We propose that the temperature T_(rho) below which the upturn begins marks the onset of the pseudogap phase, found to be roughly twice as high as the stripe ordering temperature in this material.
Submitted for the Proceedings of the M2S-IX Conference (Tokyo, September 2009)
References in corpus (6)
- Fermi-liquid instabilities at magnetic quantum phase transitions
- Quantum oscillations and the Fermi surface in an underdoped high-Tc superconductor
- Electron pockets in the Fermi surface of hole-doped high-Tc superconductors
- Enhancement of the Nernst effect by stripe order in a high-Tc superconductor
- Nernst and Seebeck Coefficients of the Cuprate SuperconductorYBaCuO: A Study of Fermi Surface Reconstruction
- High temperature superconductivity: from complexity to simplicity
Cited by in corpus (12)
- Lifshitz critical point in the cuprate superconductor YBa2Cu3Oy from high-field Hall effect measurements
- Fermi-surface reconstruction by stripe order in cuprate superconductors
- Pseudogap temperature of cuprate superconductors from the Nernst effect
- Fermi-surface transformation across the pseudogap critical point of the cuprate superconductor LaNdSrCuO
- Three-Dimensional Fermi Surface of Overdoped La-Based Cuprates
- Electron scattering, charge order, and pseudogap physics in LaNdSrCuO: An angle resolved photoemission spectroscopy study
- c-axis resistivity, pseudogap, superconductivity and Widom line in doped Mott insulators
- Quantum critical point for stripe order: An organizing principle of cuprate superconductivity
- Thermopower across the phase diagram of the cuprate LaNdSrCuO : signatures of the pseudogap and charge-density-wave phases
- Vortex phase diagram and the normal state of cuprates with charge and spin orders
- Quantum criticality and the phase diagram of the cuprates
- Magnetic Field Tuning of Parallel Spin Stripe Order and Fluctuations near the Pseudogap Quantum Critical Point in LaNdSrCuO