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Phase diagram and critical properties of the frustrated Kondo necklace model in a magnetic field | | Takahiro Yamamoto
; Koichiro Ide
; Chikara Ishii
; | | Date: |
8 Apr 2002 | | Journal: | Phys. Rev. B 66, 104408 (2002) | | Subject: | Strongly Correlated Electrons; Statistical Mechanics | cond-mat.str-el cond-mat.stat-mech | | Abstract: | The critical properties of the frustrated Kondo necklace model with a half saturation magnetization ($m=1/2$) have been studied by means of an exact-diagonalization method. It is shown from bosonization technique that the model can be effectively expressed as a quantum sine-Gordom model. Thus it may show three (dimer plateau, N{éel plateau and Tomonaga-Luttinger liquid) phases due to competitions among the Ising anisotropy $Delta$, and the nearest- and next-nearest-neighbor exchange interactions $J_1$ and $J_2$. The boundary lines on the $Delta-J_2/J_1$ phase diagram separating the three phases are determined by the method of level spectroscopy based on the conformal field theory. | | Source: | arXiv, cond-mat/0204174 | | Services: | Forum | Review | PDF | Favorites | |
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