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Evidence for decay of spin-waves above the pseudogap in underdoped YBa2Cu3O6.35

Abstract:

The magnetic spectrum at high-energies in heavily underdoped YBa$_{2}$Cu$_{3}$O$_{6.35}$ (T$_{c}$=18 K) has been determined throughout the Brillouin zone. At low-energy the scattering forms a cone of spin excitations emanating from the antiferromagnetic (0.5, 0.5) wave vector with an acoustic velocity similar to that of insulating cuprates. At high energy transfers, below the maximum energy of 270 meV at (0.5, 0), we observe zone boundary dispersion much larger and spectral weight loss more e...

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Publication status:
Published

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Publisher copy:
10.1103/PhysRevB.75.172510

Authors


Cowley, RA More by this author
Buyers, WJL More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Condensed Matter Physics
Broholm, C More by this author
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Journal:
PHYSICAL REVIEW B
Volume:
75
Issue:
17
Publication date:
2007-04-20
DOI:
EISSN:
1550-235X
ISSN:
1098-0121
URN:
uuid:90d29110-f02c-436e-b86f-8b0804030f1e
Source identifiers:
157897
Local pid:
pubs:157897
Language:
English
Keywords:

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