Numerical study of tetramer Heisenberg chain finds transition between tetramer and Haldane phases via deconfined critical state, with spinon/triplon/quinton excitations visible in RIXS for CuInVO5.
Hida, Crossover between the haldane-gap phase and the dimer phase in the spin-1/2 alternating heisenberg chain, Phys
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Spin order, spin excitations, and RIXS spectra of spin-1/2 tetramer chains
Numerical study of tetramer Heisenberg chain finds transition between tetramer and Haldane phases via deconfined critical state, with spinon/triplon/quinton excitations visible in RIXS for CuInVO5.