k-resolved susceptibility function of 2H-TaSe2 from angle-resolved photoemission

Abstract

The connection between the Fermi surface and charge-density wave (CDW) order is revisited in 2H-TaSe2. Using angle-resolved photoemission spectroscopy, ab initio band structure calculations, and an accurate tight-binding model, we develop the empirical k-resolved susceptibility function, which we use to highlight states that contribute to the susceptibility for a particular q-vector. We show that although the Fermi surface is involved in the peaks in the susceptibility associated with CDW order, it is not through conventional Fermi surface nesting, but rather through finite energy transitions from states located far from the Fermi level. Comparison with monolayer TaSe2 illustrates the different mechanisms that are involved in the absence of bilayer splitting.

References in corpus (6)

• Fermi surface nesting and the origin of Charge Density Waves in metals
• A precise method for visualizing dispersive features in image plots
• Pseudogap and charge density waves in two dimensions
• Quasi-Particle Spectra, Charge-Density-Wave, Superconductivity and Electron-Phonon Coupling in 2H-NbSe2
• Fermi surface nesting in several transition metal dichalcogenides
• Strong electron-lattice coupling as the mechanism behind charge density wave transformations in transition-metal dichalcogenides

Cited by in corpus (13)

• Spin-valley locking in the normal state of a transition-metal dichalocogenide superconductor
• Crystalline and electronic structure of single-layer TaS${}_2$
• Light emission from the layered metal 2H-TaSe${}_2$ and its potential applications
• Orbital selectivity causing anisotropy and particle-hole asymmetry in the charge density wave gap of $2H$-TaS${}_2$
• Spin density wave instabilities in the NbS2 monolayer
• Topological Nodal-Line Fermions in the Non-Centrosymmetric Superconductor Compound PbTaSe2
• Charge Density Wave and Superconductivity in Transition Metal Dichalcogenides
• Controlling charge density order in 2H-TaSe${}_2$ using a van Hove singularity
• Itinerant A-type Antiferromagnetic Order in Co${}_{0.25}$TaSe${}_2$
• Spectral signatures of a unique charge density wave in Ta${}_2$NiSe${}_7$
• Probing enhanced superconductivity in van der Waals polytypes of V${}_x$TaS${}_2$
• Gapless Topological Peierls-like instabilities in more than one dimension
• Superconducting Order from Disorder in 2H-TaSe${}_{2-x}$S${}_x$ (0$\le$x$\le$2)