Low temperature phonon anomalies in cuprates

Technical Report · Sat Aug 01 00:00:00 EDT 1998

DOI:https://doi.org/10.2172/639789· OSTI ID:639789

Egami, T; Petrov, Y ^[1]; McQueeney, R J ^[2]; Shirane, G ^[3]; Endoh, Y ^[4]

---

1. Univ. of Pennsylvania, Philadelphia, PA (United States)
2. Los Alamos National Lab., NM (United States)
3. Brookhaven National Lab., Upton, NY (United States)
4. Tohoku Univ., Sendai (Japan). Dept. of Physics

The inelastic neutron scattering measurement on La{sub 1.85}Sr{sub .15}CuO{sub 4} single crystals shows that the in-plane LO phonon dispersion at low temperature is incompatible with the current view on the dynamic charge stripes, which for this composition should have the periodicity of 4a. Instead the results are consistent with the dynamic stripes with the periodicity of 2a, half of what is expected and a quarter of the magnetic periodicity. Calculations with the two-band t-t{prime}-J model suggest that such 2a stripe charge ordering may help hole pairing.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States)
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 639789
• Report Number(s): BNL-65702; CONF-980684-; ON: DE98007309; BR: KC020201; CNN: Contract NSF DMR96-28134; TRN: 98:007897
• Resource Relation: Conference: International conference on stripes and high T{sub c} superconductivity, Rome (Italy), 2-6 Jun 1998; Other Information: PBD: [1998]
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LANTHANUM OXIDES
STRONTIUM OXIDES
COPPER OXIDES
PHONONS
CRYSTAL LATTICES
SUPERCONDUCTIVITY
MAGNETIC PROPERTIES
EXPERIMENTAL DATA
MATHEMATICAL MODELS