2001/02/19 by Mitsuhiro Arikawa, Yasuhiro Saiga, Yoshio Kuramoto · 1 citation
Physics and Astronomy · #cond-mat.stat-mech #cond-mat.str-el
paper · pdf · doi:10.1103/physrevlett.86.3096
5 pages, 1 figure, accepted for publication in Phys. Rev. Lett
arxiv created 2001/02/19 · arxiv updated 2009/11/30
The electron addition spectrum A+(k,omega) is obtained analytically for the one-dimensional (1D) supersymmetric t-J model with 1/r2 interaction. The result is obtained first for a small-sized system and its validity is checked against the numerical calculation. Then the general expression is found which is valid for arbitrary size of the system. The thermodynamic limit of A+(k,omega) has a simple analytic form with contributions from one spinon, one holon and one antiholon all of which obey fractional statistics. The upper edge of A+(k,omega) in the (k,omega) plane includes a delta-function peak which reduces to that of the single-electron band in the low-density limit.