Dramatic effective mass reduction driven by strong electronic correlations
| Autor: | Monney, C., Schwier, E. F., Garnier, M. G., Battaglia, C., Mariotti, N., Didiot, C., Cercellier, H., Marcus, J., Berger, H., Titov, A. N., Beck, H., Aebi, P. |
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| Rok vydání: | 2009 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We present angle-resolved photoemission experiments on 1T-TiSe2 at temperatures ranging from 13K to 288K. The data evidence a dramatic renormalization of the conduction band below 100K, whose origin can be explained with the exciton condensate phase model. The renormalization translates into a substantial effective mass reduction of the dominant charge carriers and can be directly related to the low temperature downturn of the resistivity of 1T-TiSe2. This observation is in opposition to the common belief that strong interactions produce heavier quasiparticles through an increased effective mass. Comment: 4 pages, 3 figures, 1 table |
| Databáze: | arXiv |
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