کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1808744 | 1525176 | 2015 | 8 صفحه PDF | دانلود رایگان |
The thermodynamic Bethe ansatz equations for the Coqblin–Schrieffer model have been solved for the first time to obtain the magnetic susceptibility in the presence of crystal fields for non-zero temperatures. For the case of N=4 effective ionic states an analytic expression for the limiting values of the pseudo-energies has been found facilitating the numerical solution for various crystal and magnetic field configurations. The single-impurity model applies to a wide range of dense Kondo systems and has been used before to explain apparent non-Fermi-liquid behavior. The flattening off of the susceptibility curves at a substantially higher temperature than the specific heat is shown to be a general feature of the Coqblin–Schrieffer thermodynamics.
Journal: Physica B: Condensed Matter - Volume 473, 15 September 2015, Pages 93–100