Susceptibility of the spin 1/2 Heisenberg antiferromagnetic chain

Authors: Sebastian Eggert, Ian Affleck, Minoru Takahashi - Physical Review Letters 1994 cited by 408

Highly accurate results are presented for the susceptibility \ensuremath{\chi}(T) of the s=1/2 Heisenberg antiferromagnetic chain for all temperatures, using the Bethe ansatz and field theory methods. After going through a rounded peak, \ensuremath{\chi}(T) approaches its asymptotic zero-temperature value with infinite slope.