Dimerization-Induced Fermi-Surface Reconstruction in IrTe2

B. I. Min; E. S. Choi; J. -H. Park; J. J. Yang; Jun Sung Kim; Kyoo Kim; Man Jin Eom; S. -W. Cheong; Y. J. Jo

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Dimerization-Induced Fermi-Surface Reconstruction in IrTe2

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arxiv 1412.4924 v1 pith:VKQUZASR submitted 2014-12-16 cond-mat.str-el cond-mat.mtrl-sci

Dimerization-Induced Fermi-Surface Reconstruction in IrTe2

Man Jin Eom , Kyoo Kim , Y. J. Jo , J. J. Yang , E. S. Choi , B. I. Min , J. -H. Park , S. -W. Cheong

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Jun Sung Kim

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classification cond-mat.str-el cond-mat.mtrl-sci

keywords dimerirte2complexdhvaformationsinducedphasereconstruction

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We report a de Haas-van Alphen (dHvA) oscillation study on IrTe2 single crystals showing complex dimer formations. By comparing the angle dependence of dHvA oscillations with band structure calculations, we show distinct Fermi surface reconstruction induced by a 1/5-type and a 1/8-type dimerizations. This verifies that an intriguing quasi-two-dimensional conducting plane across the layers is induced by dimerization in both cases. A phase transition to the 1/8 phase with higher dimer density reveals that local instabilities associated with intra- and interdimer couplings are the main driving force for complex dimer formations in IrTe2.

Dimerization-Induced Fermi-Surface Reconstruction in IrTe2

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