Creator | Title | Description | Subject | Date | ||
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1 |
![]() | Mattis, Daniel C. | Comment on "Ground-state properties of a spin-1 antiferromagnetic chain | Botet and Jullien [Phys. Rev. B 27, 613 (1983)] and Botet, Jullien, and Kolb [Phys. Rev. B 28, 3914 (1983)] performed a finite-size scaling analysis of the spin-1 antiferromagnetic Heisenberg-Ising chain. Their work was criticized by Bonner and Mtiller [Phys. Rev. B 29, 5216 (1984)] on the grounds... | Antiferromagnets; Ground-state; Ising chain; Energy gap | 1985-04 |
2 |
![]() | Mattis, Daniel C. | Magnetic susceptibilities of finite Ising chains in the presence of defect sites | Any antiferromagnet with zero net magnetic moment exhibits limited response to an external homogeneous magnetic field. This changes dramatically in the presence of defect sites, even those that carry no spin. We examine the excess susceptibilities, longitudinal and transverse, due to one or more d... | Antiferromagnets; Defects; Ising chain; Longitudinal field; Transverse field | 2007-12 |
3 |
![]() | Mattis, Daniel C. | Partially frustrated Ising models in two dimensions | We examine ordered, periodic, Ising models on a sq lattice at varying levels x of frustration. The thermodynamic singularity of the fully frustrated model (x=1) is at T=0 while those of partially frustrated lattices (0<x<1) occur at finite Tc . The critical indices in the partially frustrated latti... | Antiferromagnets; Frustration; Ising chain | 2003-06 |