Diamond chains with multiple-spin exchange interactions
作者： N. B. Ivanov , J. Richter , J. Schulenburg
DOI: 10.1103/PHYSREVB.79.104412
关键词: Phase (matter) 、 Degenerate energy levels 、 Chain (algebraic topology) 、 Physics 、 Phase diagram 、 Spin (physics) 、 Condensed matter physics 、 Quantum phase transition 、 Diamond 、 Quantum phases 、 Electronic, Optical and Magnetic Materials
摘要: 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 exact-diagonalization results for finite periodic clusters implies rich containing, apart from standard magnetic and spin-liquid phases, two different tetramer-dimer phases as well an exotic fourfold degenerate dimerized phase. characteristics established spin nature quantum transitions are discussed well.
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