Fermi surface of IrTe2 in the valence-bond state as determined by quantum oscillations

Abstract

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.

arXiv commentLatex, 4 pages, 3 figures

References in corpus (20)

• Superconductivity in Cu_xTiSe_2
• CDW, Superconductivity and Anomalous Metallic Behavior in 2D Transition Metal Dichalcogenides
• Numerical extraction of de Haas - van Alphen frequencies from calculated band energies
• Superconductivity Induced by Bond Breaking in the Triangular Lattice of IrTe2
• Structural phase transition in IrTe${}_2$: A combined study of optical spectroscopy and band structure calculations
• Fermi surface nesting in several transition metal dichalcogenides
• Dimerization-Induced Cross-Layer Quasi-Two-Dimensionality in Metallic Iridate IrTe2
• Anionic depolymerization transition in IrTe2
• Orbital Degeneracy and Peierls Instability in Triangular Lattice Superconductor Ir${}_{1-x}$Pt${}_x$Te${}_2$
• Microscopic evidence for strong periodic lattice distortion in 2D charge-density wave systems
• Electronic structure reconstruction by orbital symmetry breaking in IrTe2
• Origin of the phase transition in IrTe2: structural modulation and local bonding instability
• Hysteretic melting transition of a soliton lattice in a commensurate charge modulation
• Competition between the structural phase transition and superconductivity in Ir${}_{1-x}$Pt${}_x$Te${}_2$ as revealed by pressure effects
• Switching of Conducting Planes by Partial Dimer Formation in IrTe${}_2$
• Suppression of Structural Phase Transition in IrTe2 by Isovalent Rh Doping
• Dimerization-Induced Fermi-Surface Reconstruction in IrTe2
• Structural phase transition induced by van Hove singularity in 5d transition metal compound IrTe2
• Important Roles of Te 5p and Ir 5d Spin-orbit Interactions on the Multi-band Electronic Structure of Triangular Lattice Superconductor Ir1-xPtxTe2
• Te 5p orbitals bring three-dimensional electronic structure to two-dimensional Ir0.95Pt0.05Te2

Cited by in corpus (2)

• Charge-Stripe Order and Superconductivity in $\mathrm{I}{\mathrm{r}}_{1-\mathrm{x}}\mathrm{P}{\mathrm{t}}_{\mathrm{x}}\mathrm{T}{\mathrm{e}}_2$
• First Principles Study of Electronic Structure and Fermi Surface in Rare-earth Filled Skutterudites RPt4Ge12