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Flat-band physics in the spin-1/2 sawtooth chain
Oleg Derzhko, Jürgen Schnack, Dmitry V. Dmitriev, Valery Ya. Krivnov and Johannes Richter
Eur. Phys. J. B, 93 8 (2020) 161
DOI: 10.1140/epjb/e2020-10224-1

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