【摘 要】
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Carbon (C) is able to form various bonding patterns, including graphene sheets, chains, and dimers, but the stable bare six-membered C6 hexagonal rings as the fundamental structural motifs of graphite
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Carbon (C) is able to form various bonding patterns, including graphene sheets, chains, and dimers, but the stable bare six-membered C6 hexagonal rings as the fundamental structural motifs of graphite and graphene are long missing.We here report the stabilization of such bare C6 rings under high pressures in the charge-transferred systems of binary sesquicarbides Y2C3 and La2C3 predicted by the first-principles swarm structure searching simulations.
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