The local density of states (LDOS) around an impurity or surface, which can be observed in scanning tunneling spectroscopy, is studied in the two-dimensional t-t′-J model. The spatial dependence of the order parameter is numerically determined self-consistently using the Gutzwiller approximation and the Bogoliubov-de Gennes theory. It is found that the LDOS shows the zero-energy peak when the t′ term exists.
|Number of pages||6|
|Publication status||Published - 1999 Sept 10|
|Event||Proceedings of the 1998 International Symposium on Surface and Interface: Properties of Different Symmetry Crossing 98 (ISSI PDSC-98) - Tokyo, Jpn|
Duration: 1998 Nov 19 → 1998 Nov 21