Experimental Confirmation of Massive Dirac Fermions in Weak Charge-Ordering State in \alpha-(BEDT-TTF)_2I_3
| Autor: | Yoshimura, Kenta, Sato, Mitsuyuki, Osada, Toshihito |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | J. Phys. Soc. Jpn. 90, No.3, 033701/1-5 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.7566/JPSJ.90.033701 |
| Popis: | The electronic structure of weak charge-ordering (CO) state just below the critical pressure in an organic conductor \alpha-(BEDT-TTF)_2I_3 was experimentally investigated using peak structure in the temperature dependence of interlayer magnetoresistance (MR). Based on a minimal model considering multiple Landau levels (LLs), we discuss herein the MR peak as characteristic to multilayer massless/massive Dirac fermion (DF) systems. MR measured in the weak CO state exhibited a clear MR peak, and its magnetic-field dependence was consistent with the LL behavior of a massive DF with a small gap. Results indicate that the weak CO state in \alpha-(BEDT-TTF)_2I_3 is a massive DF state. Comment: 17 pages, 4 figures |
| Databáze: | arXiv |
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