Neutron Scattering Study of Elastic Magnetic Signals in Superconducting La1.94Sr0.06Cu4

TL;DR

This study investigates elastic magnetic signals in superconducting La1.94Sr0.06Cu4 using neutron scattering, revealing significant changes in magnetic peak intensity across the insulator-superconductor boundary.

Contribution

It provides detailed neutron scattering data on magnetic peaks in La1.94Sr0.06Cu4, highlighting the drastic change in magnetic intensity at the insulator-superconductor transition.

Findings

Elastic magnetic peak intensity decreases in superconducting samples.

Intensity in superconducting x=0.06 is four times smaller than in x=0.05.

Magnetic signals remain constant in insulating samples.

Abstract

Recent neutron-scattering experiments on La(2-x)Sr(x)CuO4 single crystals by Wakimoto et al. have revealed that elastic magnetic peaks appear at low temperatures in both insulating (x=0.02-0.05) and superconducting (x=0.06) samples. We have carried out further investigations particularly on the elastic incommensurate peaks for x=0.06, and found that the integrated intensity drastically changes across the low temperature insulator- superconductor boundary; the intensity of x=0.06 is 4 times smaller than that of x=0.05, while the intensity in the insulating region stays constant.