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Bond-order correlation and ground-state phase diagram of a one-dimensional V1-V2 spinless fermion model
Cheng-Bo Duan1, Wei-Zhong Wang
1Department of Physics, Wuhan University, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan, People's Republic of China.
Abstract:
We establish the ground-state phase diagram of a spinless fermion model with the nearest and next-nearest-neighbor repulsions via the density-matrix-renormalization-group method. The bond-order (BO) correlation function and its static structure factor can be employed to accurately determine the BO phase boundaries. The first derivative of the charge-density wave (CDW) structure factor and the second derivative of the energy are expect to diverge at the 2k(F)-CDW-BO transition point, which indicates that a second-order transition occurs. We determine the metallic-4k(F)-CDW boundary by analyzing the decay behavior of the charge correlation function near the transition point.
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