Resonating dimer–monomer liquid state in a magnetization plateau of a spin- $$\frac{1}{2}$$ 1 2 kagome-strip Heisenberg chain,Communications Physics

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Resonating dimer–monomer liquid state in a magnetization plateau of a spin- $$\frac{1}{2}$$ 1 2 kagome-strip Heisenberg chain
Communications Physics ( IF 5.4 ) Pub Date : 2021-07-15 , DOI: 10.1038/s42005-021-00665-6
Katsuhiro Morita _{1,

2} , Takami Tohyama ₁ , Shigetoshi Sota ₃

Affiliation

Highly frustrated spin systems such as the kagome lattice are a treasure trove of new quantum states with large entanglements. Herein, we study the spin-$\frac{1}{2}$ Heisenberg model on a kagome-strip chain, which is a one-dimensional kagome lattice, using the density matrix renormalization group method. Calculating the central charge and entanglement spectrum for the kagome-strip chain, we find a gapless spin liquid state with doubly degenerate entanglement spectra in a 1/5 magnetization plateau. We also obtain a gapless low-lying continuum in the dynamic spin structure calculated using the dynamical density matrix renormalization group method. We then propose a resonating dimer–monomer liquid state that meets these features.

更新日期：2021-07-15

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