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Title: Itinerant effects and enhanced magnetic interactions in Bi-based multilayer cuprates

Journal Article · · Physical Review. B, Condensed Matter and Materials Physics
 [1];  [2];  [3];  [4];  [1];  [1];  [5];  [6];  [7];  [7];  [1];  [7];  [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States); Univ. College London, London (United Kingdom)
  3. Harwell Science and Innovation Campus, Oxfordshire (United Kingdom)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States); Paul Scherrer Institut (Switzerland)
  5. Univ. de Geneve, Geneve (Switzerland)
  6. Tohoku Univ., Sendai (Japan)
  7. Paul Scherrer Institut (Switzerland)

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+δ (Bi-2201) and Bi₂Sr₂Ca₂Cu₃O₁₀₊δ (Bi-2223), with n = 1 and n = 3 respectively, using Cu L₃-edge resonant inelastic x-ray scattering (RIXS). Near the anti-nodal 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 Tc vs. n scaling. In contrast, the nodal direction exhibits very strongly damped, almost non-dispersive excitations. As a result, we argue that this implies that the magnetism in the doped cuprates is partially itinerant in nature.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC00112704; AC02-98CH1088 2010-BNL-PM015; DEAC02-98CH10886
OSTI ID:
1182472
Alternate ID(s):
OSTI ID: 1181435
Report Number(s):
BNL-107071-2014-JA; PRBMDO; R&D Project: PO011; KC0201060
Journal Information:
Physical Review. B, Condensed Matter and Materials Physics, Vol. 90, Issue 22; ISSN 1098-0121
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 29 works
Citation information provided by
Web of Science

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