Photoemission spectra of a two-dimensional S=1/2 quantum antiferromagnet in magnetic fields: a theoretical study
| dc.creator | Yin, Wei-Guo | |
| dc.creator | Mei, W. N. | |
| dc.date | 2003-05-08 | |
| dc.date.accessioned | 2026-07-07T02:51:15Z | |
| dc.date.available | 2026-07-07T02:51:15Z | |
| dc.description | We calculate the angular resolved photoemission spectra (ARPES) of a spin-1/2 Heisenberg antiferromagnet as a function of magnetic fields using both the exact diagonalization method and self-consistent Born approximation. Below the saturation field $B_C$, strong scattering between spin waves and a hole, created by photoemission of an electron, significantly narrows the quasiparticle band that is characterized by the lowering of the quasiparticle energy at $(π,π)$ with increasing field. Accordingly, in ARPES the quasiparticle peak gets shaper near $(π,π)$ and broader elsewhere. Furthermore, we observe that an anomalous extended van Hove region (EVHR) around $(π,π)$ appears in a half saturation field, while EVHRs around $(π,0)$ and $(0,π)$ in zero field gradually disappear with increasing field. | |
| dc.description | 4 pages, 3 figures, RevTex 4.0 | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0305174 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0305174 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/21382 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Photoemission spectra of a two-dimensional S=1/2 quantum antiferromagnet in magnetic fields: a theoretical study | |
| dc.type | text |