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. 2015 Sep 28;5:14555. doi: 10.1038/srep14555

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and versus α_x for three cases of the basis with s = 0.25, α_z = 0.02 in (a, c) and s = 0.6, α_z = 0.1 in (b, d). The green dash-dot lines indicate the phase boundary at α_x = α_z. The insets of (a,b) show the ground-state energy E_g versus α_x. The dotted lines in the inset of (a) are guides for eyes of the linear relationship.

Inline graphic — and versus α_x for three cases of the basis with s = 0.25, α_z = 0.02 in (a, c) and s = 0.6, α_z = 0.1 in (b, d). The green dash-dot lines indicate the phase boundary at α_x = α_z. The insets of (a,b) show the ground-state energy E_g versus α_x. The dotted lines in the inset of (a) are guides for eyes of the linear relationship.