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Boundary susceptibility in the spin-1/2 chain: Curie like behavior without magnetic impurities

Satoshi Fujimoto ; Sebastian Eggert (Institutionen för teoretisk fysik och mekanik, Fasta tillståndets teori)
Physical Review Letters (0031-9007). Vol. 92 (2004), 3, p. 037206.
[Artikel, refereegranskad vetenskaplig]

We investigate the low-temperature thermodynamics of the spin-1/2 Heisenberg chain with open ends. On the basis of boundary conformal field theory arguments and numerical density matrix renormalization group calculations, it is established that in the isotropic case the impurity susceptibility exhibits a Curie-like divergent behavior as the temperature decreases, even in the absence of magnetic impurities. A similar singular temperature dependence is also found in the boundary contributions of the specific heat coefficient. In the anisotropic case, for 1/2

Denna post skapades 2006-08-29. Senast ändrad 2016-05-16.
CPL Pubid: 1634


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Institutionen för teoretisk fysik och mekanik, Fasta tillståndets teori (1900-2005)



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