| Full text | |
| Author(s): |
Hoyos, J. A.
;
Miranda, E.
Total Authors: 2
|
| Document type: | Journal article |
| Source: | Physical Review B; v. 70, n. 18, p. 180401-1-180401-4, Nov. 2004. |
| Field of knowledge: | Physical Sciences and Mathematics - Physics |
| Abstract | |
We analyze random isotropic antiferromagnetic SU(N) spin chains using the real-space renormalization group. We find that they are governed at low energies by a universal infinite randomness fixed point different from the one of random spin-1/2 chains. We determine analytically the important exponents: the energy-length scale relation is Omega similar to exp(-L-psi), where psi = 1/N, and the mean correlation function is given by C-ij similar to (-1)(i-j)/\i-j\(phi), where phi = 4/N. Our analysis shows that the infinite-N limit is unable to capture the behavior obtained at any finite N. (AU) | |
| FAPESP's process: | 01/00719-8 - Non-perturbative methods for strongly correlated electronic systems |
| Grantee: | Amir Ordacgi Caldeira |
| Support Opportunities: | Research Projects - Thematic Grants |