Emergence of coherent magnetic excitations in the high temperature underdoped La2-xSrxCuO4 superconductor at low temperatures

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Persistent URL	http://purl.org/net/epubs/work/50815
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Record Id	50815
Title	Emergence of coherent magnetic excitations in the high temperature underdoped La2-xSrxCuO4 superconductor at low temperatures
Contributors	OJ Lipscombe, B Vignolle, TG Perring (STFC Rutherford Appleton Lab.), CD Frost (STFC Rutherford Appleton Lab.), SM Hayden
Abstract	We use inelastic neutron scattering to measure the magnetic excitations in underdoped La2-xSrxCuO4 (x=0.085, Tc=22 K) for large energy (5<E<200 meV) and temperature (5<T<300 K) ranges. At low T, the response is highly structured in E and q, with peaks in the local susceptibility at 15 and 50 meV and a four-peaked structure in q for E185 meV. Raising T from 30 KTc to 300 K causes the structure in (q,) present for E<70 meV to disappear. It is replaced with a strongly damped response. We attribute this change to the disappearance of the pseudogap with increasing temperature.
Organisation	ISIS , ISIS-MAPS , STFC
Keywords	Physics
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Language	English (EN)

Type	Details	URI(s)	Local file(s)	Year
Journal Article	Phys Rev Lett 102 (2009): 167002.	doi:10.1103/PhysRevLett.102.167002	PhysRevLett_102_167002.pdf	2009