Fermi surface of IrTe2 in the valence-bond state as determined by quantum oscillations
| Autor: | Blake, S. F., Watson, M. D., McCollam, A., Kasahara, S., Johnson, R. D., Narayanan, A., Pascut, G. L., Haule, K., Kiryukhin, V., Yamashita, T., Watanabe, D., Shibauchi, T., Matsuda, Y., Coldea, A. I. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 91, 121105(R) (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.91.121105 |
| Popis: | We report the observation of the de Haas-van Alphen effect in IrTe2 measured using torque magnetometry at low temperatures down to 0.4 K and in high magnetic fields up to 33T. IrTe2 undergoes a major structural transition around 283 K due to the formation of planes of Ir and Te dimers that cut diagonally through the lattice planes, with its electronic structure predicted to change significantly from a layered system with predominantly three-dimensional character to a tilted quasi-two dimensional Fermi surface. Quantum oscillations provide direct confirmation of this unusual tilted Fermi surface and also reveal very light quasiparticle masses (less than 1 me), with no significant enhancement due to electronic correlations. We find good agreement between the angular dependence of the observed and calculated de Haas-van Alphen frequencies, taking into account the contribution of different structural domains that form while cooling IrTe2. Comment: Latex, 4 pages, 3 figures |
| Databáze: | arXiv |
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