Abstract
We have mapped the neutron scattering spin spectrum at low energies in Y Ba2 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 Å in-plane and 8±2 Å 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 Néel 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.
| Original language | English |
|---|---|
| Article number | 100504 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 73 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2006 Mar 29 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Central mode and spin confinement near the boundary of the superconducting phase in Y Ba2 Cu3 O6.353 (Tc =18 K). / Stock, C.; Buyers, W. J L; Yamani, Z.; Broholm, C. L.; Chung, Jaiho; Tun, Z.; Liang, R.; Bonn, D.; Hardy, W. N.; Birgeneau, R. J.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 73, No. 10, 100504, 29.03.2006.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Central mode and spin confinement near the boundary of the superconducting phase in Y Ba2 Cu3 O6.353 (Tc =18 K)
AU - Stock, C.
AU - Buyers, W. J L
AU - Yamani, Z.
AU - Broholm, C. L.
AU - Chung, Jaiho
AU - Tun, Z.
AU - Liang, R.
AU - Bonn, D.
AU - Hardy, W. N.
AU - Birgeneau, R. J.
PY - 2006/3/29
Y1 - 2006/3/29
N2 - We have mapped the neutron scattering spin spectrum at low energies in Y Ba2 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 Å in-plane and 8±2 Å 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 Néel 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.
AB - We have mapped the neutron scattering spin spectrum at low energies in Y Ba2 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 Å in-plane and 8±2 Å 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 Néel 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.
UR - http://www.scopus.com/inward/record.url?scp=33645122976&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33645122976&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.73.100504
DO - 10.1103/PhysRevB.73.100504
M3 - Article
VL - 73
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 10
M1 - 100504
ER -