Anomalous Curie response of impurities in quantum-critical spin-1/2 Heisenberg antiferromagnets
| dc.creator | Hoglund, K. H. | |
| dc.creator | Sandvik, A. W. | |
| dc.date | 2007-01-19 | |
| dc.date | 2007-07-29 | |
| dc.date.accessioned | 2026-07-07T08:20:37Z | |
| dc.date.available | 2026-07-07T08:20:37Z | |
| dc.description | We consider a magnetic impurity in two different S=1/2 Heisenberg bilayer antiferromagnets at their respective critical inter-layer couplings separating N'eel and disordered ground states. We calculate the impurity susceptibility using a quantum Monte Carlo method. With intra-layer couplings in only one of the layers (Kondo lattice), we observe an anomalous Curie constant C*, as predicted on the basis of field-theoretical work [S. Sachdev et al., Science 286, 2479 (1999)]. The value C*=0.262 +/- 0.002 is larger than the normal Curie constant C=S(S+1)/3. Our low-temperature results for the symmetric bilayer are consistent with a universal C*. | |
| dc.description | 4 pages, 4 figures. v2: minor changes, published version | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0701472 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0701472 | |
| dc.identifier | Phys. Rev. Lett. 99, 027205 (2007) | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/135119 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Anomalous Curie response of impurities in quantum-critical spin-1/2 Heisenberg antiferromagnets | |
| dc.type | text |