Triangular lattice strip

Fig.3. Triangular lattice strip formed by weakly interacting 3-site segments.

Let us consider triangular lattice strips formed by L two-site weakly... 

Fig.5. The ground state phase diagram of the triangular lattice strip with n=2. The shaded region associates with the intermediate values of the ground state spin, the above consideration, it can be shown that our lattice at N>L has the ferromagnetic ground state if the electron concentration p obeys the condition...

As has been shown by Takahashi [38], the isotropic case of the triangular lattice with a positive value of hopping integrals has a dominantly ferromagnetic character. Therefore, increasing the value of t2 (f2 = t3) can lead to the changing of the ground state total spin of the lattice strip. 

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