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Magnetic transition in the Hubbard model on the triangular lattice

✍ Scribed by Takuya Yoshioka; Akihisa Koga; Norio Kawakami

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
243 KB
Volume
405
Category
Article
ISSN
0921-4526

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✦ Synopsis

We investigate a magnetic transition in the half-filled Hubbard model on the triangular lattice. By making use of the path-integral renormalization group (PIRG) method with a spin-rotated frame, we calculate the ground state energy and charge/spin correlation functions for a cluster with 36 sites. We find that as the Hubbard interaction is varied, a first-order magnetic phase transition occurs from a nonmagnetic insulating phase to a magnetically ordered phase with a 120 3 spin configuration.

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