Zooming on the Quantum Critical Point in Nd-LSCO

Details Zooming on the Quantum Critical Point in Nd-LSCO Zooming on the Quantum Critical Point in Nd-LSCO

2009-09-23

arxiv.org/abs/0909.4218v1

Physica C 470, S12-S13 (2010)

Physics

Condensed Matter

Superconductivity

Submitted for the Proceedings of the M2S-IX Conference (Tokyo, September 2009)

Scientific paper

10.1016/j.physc.2009.11.073

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.

Affiliated with

Also associated with

No associations

Rating

Zooming on the Quantum Critical Point in Nd-LSCO does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Zooming on the Quantum Critical Point in Nd-LSCO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zooming on the Quantum Critical Point in Nd-LSCO will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-182052