29 citations · 33 across the 3 of their papers we have counts for
5 papers
Spin models of quasi-1D quantum ferrimagnets with competing interactions
N. B. Ivanov
We present a brief survey of the recent theoretical work related to generic Heisenberg spin models describing quasi-one-dimensional quantum ferrimagnets. The emphasis is on quantum…
Diamond chains with multiple-spin exchange interactions
N. B. Ivanov, J. Richter, J. Schulenburg
We study the phase diagram of a symmetric spin-1/2 Heisenberg diamond chain with additional cyclic four-spin exchange interactions. The presented analysis supplemented by numerical…
Magnetic phase diagram of a frustrated ferrimagnetic ladder: Relation to the one-dimensional boson Hubbard model
N. B. Ivanov, J. Richter
We study the magnetic phase diagram of two coupled mixed-spin Heisenberg chains as a function of the frustration parameter related to diagonal exchange couplings. The a…
Phase diagram of a frustrated mixed-spin ladder with diagonal exchange bonds
N. B. Ivanov, J. Richter
Using exact numerical diagonalization and the conformal field theory approach, we study the effect of magnetic frustrations due to diagonal exchange bonds in a system of two couple…
Study of an Antiferromagnetic Sawtooth Chain with Spin-1/2 and Spin-1 sites
V. Ravi Chandra, Diptiman Sen, N. B. Ivanov +1
We study the low-energy properties of a sawtooth chain with spin-1's at the bases of the triangles and spin-1/2's at the vertices of the triangles. The spins have Heisenberg antife…