Abstract
Based on the Hubbard-Hirsch model, we studied the dynamical susceptibility and spin excitation of an itinerant-electron system within the random-phase approximation by using a Green’s-function technique. It is shown that the two-center matrix elements in the Hubbard-Hirsch model not only change the dynamic property of the susceptibility, but also widen the gap between two spin subbands, which suppresses the electron-hole single excitations. In contrast, the region of collective excitations of the spin becomes larger.
| Original language | English |
|---|---|
| Pages (from-to) | 44-47 |
| Number of pages | 4 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 54 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1996 |
| Externally published | Yes |
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Zhang, X., Li, B., & Pu, F. C. (1996). Magnetic excitation in the Hubbard-Hirsch model. Physical Review B - Condensed Matter and Materials Physics, 54(1), 44-47. https://doi.org/10.1103/PhysRevB.54.44