The optical and acoustic magnetic excitations in optimum-doped superconductor YBa2Cu3O6.95 (Tc= 93 K)

Author

• Hyungjie Woo
• Pengcheng Dai
• Stephen Hayden
• Herbert A. Mook
• Toby Perring
• Thomas Dahm
• Douglas Scalapino
• Fatih Dogan, Missouri University of Science and TechnologyFollow

Abstract

We use high-resolution inelastic neutron scattering to map out the full spin excitations spectra in YBa2Cu3O6.95 (Tc= 93 K), probably the most studied high-transition temperature superconductor. In the bi-layer materials where there are two magnetic ions per unit cell, magnetic excitations have two distinct symmetries: odd (or acoustic) and even (or optical) channels. We show that magnetic excitations in the acoustic channel of YBa2Cu3O6.95 are remarkably similar to that of YBa2Cu3O6.6 [1] and La1.88Ba0.12CuO4 [2]. That is, they have the universal hour-glass shape with incommensurate spin fluctuations below the commensurate resonance. In the optical channel, we discovered incommensurate magnetic excitations in superconducting state. We establish the both the acoustic and optical magnetic excitations spectra of YBa2Cu3O6.95 in absolute units and compare the results with underdoped YBa2Cu3O6.6 and single layer families of cuprate superconductors.

Recommended Citation

H. Woo et al., "The optical and acoustic magnetic excitations in optimum-doped superconductor YBa2Cu3O6.95 (Tc= 93 K)," 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