TY - JOUR
T1 - Dynamical properties of interacting charge system on frustrated lattices
AU - Naka, Makoto
AU - Hashimoto, Hiroshi
AU - Ishihara, Sumio
N1 - Funding Information:
We thank H. Seo, H. Matsueda, T. Watanabe, J. Nasu, K. Iwano, K. Ishii, S. Iwai, N. Ikeda, T. Sasaki, S. Koshihara, and H. Okamoto for their helpful discussions. This work was supported by KAKENHI from the Ministry of Education, Science and Culture of Japan (No. 26287070 ). Some of the numerical calculations were performed using the supercomputing facilities at ISSP, the University of Tokyo.
Publisher Copyright:
© 2014 Elsevier B.V.
PY - 2015/3/1
Y1 - 2015/3/1
N2 - Dynamical properties in interacting fermion systems on geometrically frustrated lattices are introduced. As a minimal model for the electronic charge order phenomena, we adopt the so-called spin-less fermion V-t model where the hoppings and interactions of spin-less fermions are taken into account in frustrated lattices. By analyzing this model, we examine (1) dielectric and optical properties in a double triangular lattice, (2) a collective excitation in a dimer-molecular system on a triangular lattice, and (3) a photo-excited state in a triangular lattice. We demonstrate that frustration effects influence directly dynamical properties in these charge systems, and explain successfully recent some experimental results.
AB - Dynamical properties in interacting fermion systems on geometrically frustrated lattices are introduced. As a minimal model for the electronic charge order phenomena, we adopt the so-called spin-less fermion V-t model where the hoppings and interactions of spin-less fermions are taken into account in frustrated lattices. By analyzing this model, we examine (1) dielectric and optical properties in a double triangular lattice, (2) a collective excitation in a dimer-molecular system on a triangular lattice, and (3) a photo-excited state in a triangular lattice. We demonstrate that frustration effects influence directly dynamical properties in these charge systems, and explain successfully recent some experimental results.
KW - Charge order
KW - Optical spectra
KW - Photo-excitation
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U2 - 10.1016/j.physb.2014.11.042
DO - 10.1016/j.physb.2014.11.042
M3 - Article
AN - SCOPUS:84923877024
SN - 0921-4526
VL - 460
SP - 68
EP - 72
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
ER -