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Boundary contributions to specific heat and susceptibility in the spin-1/2 XXZ chain | | A. Furusaki
; T. Hikihara
; | | Date: |
22 Oct 2003 | | Journal: | Phys. Rev. B 69, 094429 (2004) DOI: 10.1103/PhysRevB.69.094429 | | Subject: | Strongly Correlated Electrons; Statistical Mechanics | cond-mat.str-el cond-mat.stat-mech | | Abstract: | Exact low-temperature asymptotic behavior of boundary contribution to specific heat and susceptibility in the one-dimensional spin-1/2 XXZ model with exchange anisotropy 1/2 < Delta le 1 is analytically obtained using the Abelian bosonization method. The boundary spin susceptibility is divergent in the low-temperature limit. This singular behavior is caused by the first-order contribution of a bulk leading irrelevant operator to boundary free energy. The result is confirmed by numerical simulations of finite-size systems. The anomalous boundary contributions in the spin isotropic case are universal. | | Source: | arXiv, cond-mat/0310517 | | Services: | Forum | Review | PDF | Favorites | |
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