Correlation effect of local electrons in a one-dimensional Falicov-Kimball model Export

@article{citeulike:6007461, abstract = {With the eigenfunctional theory, we give a general exact expression of the local electron Green function in the Falicov-Kimball model, and apply it to study the correlation effects of the local electrons in one dimension. For the two local electrons case, the correlation exponent of the local electron Green function has weak even-odd oscillation with the distance between these two local electrons, and it approaches zero in the strong coupling limit. While, at half filling of the local electrons, the ground-state phase is complicated. When the conduction electron is near 0.5, the ground state configuration is the chessboard phase for a considerable range of U/t*, and the correlation exponent increases from zero to a finite value as U/t* increases. When the conduction electron is far away from 0.5, the ground state configuration is the segregated phase, and the correlation exponent first increases and then jumps to zero when U/t* is larger than a finite value which is a function of nc. Our results are compared with previous numerical simulations.}, author = {Wang, Qing W. and Liu, Yu L.}, citeulike-article-id = {6007461}, citeulike-linkout-0 = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRBMDO000074000012125119000001&idtype=cvips&gifs=yes}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRB/v74/e125119}, citeulike-linkout-2 = {http://dx.doi.org/10.1103/PhysRevB.74.125119}, doi = {10.1103/PhysRevB.74.125119}, journal = {Physical Review B (Condensed Matter and Materials Physics)}, keywords = {correlations, electron, function, greens, ground, lattice, state, theory}, number = {12}, pages = {125119+}, posted-at = {2009-10-25 14:32:17}, priority = {0}, publisher = {APS}, title = {Correlation effect of local electrons in a one-dimensional Falicov-Kimball model}, url = {http://dx.doi.org/10.1103/PhysRevB.74.125119}, volume = {74}, year = {2006} }

TY - JOUR ID - citeulike:6007461 L3 - citeulike-article-id:6007461 N2 - With the eigenfunctional theory, we give a general exact expression of the local electron Green function in the Falicov-Kimball model, and apply it to study the correlation effects of the local electrons in one dimension. For the two local electrons case, the correlation exponent of the local electron Green function has weak even-odd oscillation with the distance between these two local electrons, and it approaches zero in the strong coupling limit. While, at half filling of the local electrons, the ground-state phase is complicated. When the conduction electron is near 0.5, the ground state configuration is the chessboard phase for a considerable range of U/t*, and the correlation exponent increases from zero to a finite value as U/t* increases. When the conduction electron is far away from 0.5, the ground state configuration is the segregated phase, and the correlation exponent first increases and then jumps to zero when U/t* is larger than a finite value which is a function of nc. Our results are compared with previous numerical simulations. IS - 12 JF - Physical Review B (Condensed Matter and Materials Physics) TI - Correlation effect of local electrons in a one-dimensional Falicov-Kimball model PB - APS VL - 74 SP - 125119 KW - correlations KW - electron KW - function KW - greens KW - ground KW - lattice KW - state KW - theory AU - Wang, Qing AU - Liu, Yu PY - 2006/// UR - http://dx.doi.org/10.1103/PhysRevB.74.125119 ER -