Evidence for a generic novel quantum transition in high-Tc cuprates

Abstract

We study the low-energy spin fluctuations and superfluid density of a series of pure and Zn-substituted high-$T_c$ superconductors (HTS) using the muon spin relaxation and $ac$-susceptibility techniques. At a critical doping state, $p_c$, we find (i) simultaneous abrupt changes in the magnetic spectrum in the superconducting ground state and (ii) that the slowing down of spin fluctuations becomes singular at T=0. These results provide experimental evidence for a novel quantum transition that separates the superconducting phase diagram of HTS into two distinct ground states.

4 pages, 4 figures

References in corpus (1)

• Antiferromagnetic Order Induced by an Applied Magnetic Field in a High-Temperature Superconductor

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