Department of Physics, Wuhan University, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan, People's Republic of China.
J Phys Condens Matter. 2011 Sep 14;23(36):365602. doi: 10.1088/0953-8984/23/36/365602. Epub 2011 Aug 25.
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.
我们通过密度矩阵重整化群方法建立了具有最近邻和次近邻排斥的无自旋费米子模型的基态相图。键序（BO）相关函数及其静态结构因子可用于准确确定 BO 相界。在 2k(F)-CDW-BO 转变点处，电荷密度波（CDW）结构因子的一阶导数和能量的二阶导数预计会发散，这表明发生了二级相变。我们通过分析过渡点附近电荷相关函数的衰减行为来确定金属-4k(F)-CDW 边界。
