Electronic inhomogeneities in superconducting YBa2Cu3O6+x

Author

• Ferec Stercel
• Jae-Ho Chung
• Takeshi Egami
• Masatoshi Arai
• Tetsuya Yokoo
• Hyungjie Woo
• Mohana Yethiraj
• Herbert A. Mook
• Chris D. Frost
• Fatih Dogan, Missouri University of Science and TechnologyFollow

Abstract

There has been an increasing amount of experimental evidence for the presence of local electronic inhomogeneities in superconducting cuprates. Inelastic pulsed neutron scattering measurements on YBa2Cu3O6+x single crystals with different oxygen concentrations show that the zone boundary softening of the in-plane LO Cu-O bond stretching mode is the same for all doping levels. In addition, the spectral weight of the softened mode increases with increasing doping. This indicates that there is a microscopic electronic phase separation in superconducting YBa2Cu3O6+x. Furthermore, triple axis inelastic neutron scattering measurements on the underdoped YBa2Cu3O6.6 performed at different temperatures revealed that a new local mode appears at 65 meV at higher temperatures (200 K and above). It might indicate the presence of polarons.

Recommended Citation

F. Stercel and J. Chung and T. Egami and M. Arai and T. Yokoo and H. Woo and M. Yethiraj and H. A. Mook and C. D. Frost and F. Dogan, "Electronic inhomogeneities in superconducting YBa2Cu3O6+x," APS March Meeting Abstracts, American Physical Society, Mar 2006.

Department(s)

Materials Science and Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2026 American Physical Society, All rights reserved

Publication Date

2006-03-01