Linear temperature dependence of the magnetic heat conductivity in CaCu2O3
Hess, C.; Prof. Dr. Hanan Gouda Abdelwahab Ahmed Elhaes; Waske, A.; Büchner, B.; Sekar, C.; Krabbes, G.; Heidrich-Meisner, F.; Brenig, W.;
Abstract
We present experimental results for the thermal conductivity k of the pseudo-two-leg ladder material CaCu2O3. The strong buckling of the ladder rungs renders this material a good approximation to a S=1/2 Heisenberg chain. Despite a strong suppression of the thermal conductivity of this material in all crystal directions due to inherent disorder, we find a dominant magnetic contribution k mag along the chain direction. k mag is linear in temperature, resembling the low-temperature limit of the thermal Drude weight Dth of the S=1/2 Heisenberg chain. The comparison of k mag and Dth yields a magnetic mean-free path of lmaga≈ 225Å, in good agreement with magnetic measurements. © 2007 The American Physical Society.
Other data
| Title | Linear temperature dependence of the magnetic heat conductivity in CaCu2O3 | Authors | Hess, C.; Prof. Dr. Hanan Gouda Abdelwahab Ahmed Elhaes ; Waske, A.; Büchner, B.; Sekar, C.; Krabbes, G.; Heidrich-Meisner, F.; Brenig, W. | Keywords | TRANSPORT;THERMAL-CONDUCTIVITY;EXAMPLE;Physics - Strongly Correlated Electrons;Physics - Strongly Correlated Electrons;COMPOUND;CHAIN | Issue Date | 26-Jan-2007 | Publisher | AMERICAN PHYSICAL SOC | Journal | Physical Review Letters | Description | appears in PRL |
ISSN | 00319007 | DOI | 10.1103/PhysRevLett.98.027201 | PubMed ID | 17358641 | Scopus ID | 2-s2.0-33846375102 | Web of science ID | WOS:000243586700057 |
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