Thermodynamical Signatures of an Excitonic Insulator
| dc.creator | Bucher, Benno | |
| dc.creator | Park, Tuson | |
| dc.creator | Thompson, J. D. | |
| dc.creator | Wachter, Peter | |
| dc.date | 2008-02-22 | |
| dc.date | 2008-02-24 | |
| dc.date.accessioned | 2026-07-07T09:22:47Z | |
| dc.date.available | 2026-07-07T09:22:47Z | |
| dc.description | In the 1960s speculations arose if a ground state exists in solid state materials with an electron and a hole bound to a pair with their spins added to integer values, i.e. excitons. Here we show that electrons and holes in TmSe0.45Te0.55 do form excitons as the thermodynamical ground state. The formation of a large number of excitons in an indirect gap semiconductor requires momentum conservation by means of phonons and, hence, implies a significant change of the heat capacity of the lattice, as found experimentally. The thermodynamically derived phase diagram sustains a bosonic ground state in condensed matter. | |
| dc.description | 4 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0802.3354 | |
| dc.identifier | http://arxiv.org/abs/0802.3354 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/155501 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Thermodynamical Signatures of an Excitonic Insulator | |
| dc.type | text |