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Absence of Magnetic Field Dependence of the Anomalous Bond-Stretching Phonon in YBa |
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| Authors: | D. Reznik D. Parshall S. R. Park J. W. Lynn Th. Wolf |
| Affiliation: | 1.Department of Physics,University of Colorado-Boulder,Boulder,USA;2.NIST Center for Neutron Research,National Institute of Standards and Technology,Gaithersburg,USA;3.Department of Physics,Incheon National University,Incheon,Korea;4.Institute of Solid State Physics,Karlsruhe Institute of Technology,Karlsruhe,Germany |
| Abstract: | Superlattice diffraction peaks have been recently observed in underdoped YBa2Cu3O6.6. They have been interpreted to originate from a charge density wave (CDW) formation. It is believed that strong phonon anomalies previously observed near the same wavevectors are related to the CDW. Competition with superconductivity is a salient feature of the CDW peaks. We investigated if the same is true of anomalous bond-stretching phonons around 60 meV by measuring the spectrum of this phonon at 10 K with and without an applied magnetic field of 10 T. Applying the field had no effect on the phonon within the experimental uncertainty. |
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