Journal
PHYSICAL REVIEW LETTERS
Volume 102, Issue 16, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.102.167002
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- Engineering and Physical Sciences Research Council [EP/C511778/1] Funding Source: researchfish
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We use inelastic neutron scattering to measure the magnetic excitations in underdoped La2-xSrxCuO4 (x=0.085, T-c=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 E approximate to 185 meV. Raising T from 30 K greater than or similar to T-c to 300 K causes the structure in chi('')(q,omega) 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.
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