| DOI | Resolve DOI: https://doi.org/10.1103/PhysRevB.73.100504 |
|---|
| Author | Search for: Stock, C.; Search for: Buyers, W. J. L.1; Search for: Yamani, Z.1; Search for: Broholm, C. L.; Search for: Chung, J.-H.; Search for: Tun, Z.1; Search for: Liang, R.; Search for: Bonn, D.; Search for: Hardy, W. N.; Search for: Birgeneau, R. J. |
|---|
| Affiliation | - National Research Council of Canada. NRC Canadian Neutron Beam Centre
|
|---|
| Format | Text, Article |
|---|
| Subject | barium compounds; doping; high-temperature superconductors; neutron diffraction; soft modes; spin dynamics; spin fluctuations; yttrium compounds |
|---|
| Abstract | We have mapped the neutron scattering spin spectrum at low energies in YBa₂ Cu₃ O₆.₃₅₃ (Tc=18 K), where the doping ~0.06 is near the critical value (pc=0.055) for superconductivity. No coexistence with long-range-ordered antiferromagnetism is found. The spins fluctuate on two energy scales: one a damped spin response with a ~=2 meV relaxation rate and the other a central mode with a relaxation rate that slows to less than 0.08 meV below Tc. The spectrum mirrors that of a soft mode driving a central mode. Extremely short correlation lengths, 42�5 � in-plane and 8�2 � along the c direction, and isotropic spin orientations for the central mode indicate that the correlations are subcritical with respect to any second-order transition to N�el order. The dynamics follows a model where damped spin fluctuations are coupled to the slow fluctuations of regions with correlations shortened by the hole doping. |
|---|
| Publication date | 2006-03-22 |
|---|
| Publisher | American Physical Society |
|---|
| In | |
|---|
| Language | English |
|---|
| Peer reviewed | Yes |
|---|
| NPARC number | 12339203 |
|---|
| Export citation | Export as RIS |
|---|
| Report a correction | Report a correction (opens in a new tab) |
|---|
| Record identifier | 848e334f-a827-49ae-82a9-7fd42c9230dc |
|---|
| Record created | 2009-09-11 |
|---|
| Record modified | 2023-10-04 |
|---|
