Journal
PHYSICAL REVIEW B
Volume 90, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.90.220506
Keywords
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Funding
- Center for Emergent Superconductivity, an Energy Frontier Research Center - U.S. DOE, Office of Basic Energy Sciences [AC02-98CH1088 2010-BNL-PM015]
- Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, U.S. Department of Energy [DEAC02-98CH10886]
- Engineering and Physical Sciences Research Council [EP/L010623/1]
- EPSRC [EP/L010623/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/L010623/1] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [23340093] Funding Source: KAKEN
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The cuprate high temperature superconductors exhibit a pronounced trend in which the superconducting transition temperature T-c increases with the number of CuO2 planes n in the crystal structure. We compare the magnetic excitation spectrum of Bi2+xSr2-xCuO6+delta (Bi-2201) and Bi(2)Sr(2)Ca(2)Cu3O(10+delta) (Bi-2223), with n = 1 and 3, respectively, using Cu L-3-edge resonant inelastic x-ray scattering. Near the antinodal zone boundary we find the paramagnon energy in Bi-2223 is substantially higher than that in Bi-2201, indicating that multilayer cuprates host stronger effective magnetic exchange interactions, providing a possible explanation for the T-c vs n scaling. In contrast, the nodal direction exhibits very strongly damped, almost nondispersive excitations. We argue that this implies that the magnetism in the doped cuprates is partially itinerant in nature.
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