Coexistence of gapless excitations and commensurate charge-density wave in the 2H-transition metal dichalcogenides
arXiv:cond-mat/0508590 · doi:10.1103/PhysRevLett.96.026406
Abstract
An unexpected feature common to 2H-transition metal dichalcogenides (2H-TMDs) is revealed with first-principles Wannier functions analysis of the electronic structure of the prototype 2H-TaSe2: The low-energy Ta \red{``''} bands governing the physics of charge-density wave (CDW) is dominated by hopping between next-nearest neighbors. With this motivation we develop a minimal effective model for the CDW formation, in which the unusual form of the hopping leads to an approximate decoupling of the three sublattices. In the CDW phase one sublattice remains undistorted, leaving the bands associated with it ungapped everywhere in the Fermi surface, resolving the long-standing puzzle of coexistence of gapless excitations and commensurate CDW in the 2H-TMDs.
arXiv comment4 pages, 5 figures
References in corpus (7)
- A `checkerboard' electronic crystal state in lightly hole-doped Ca_{2-x}Na_{x}CuO_{2}Cl_{2}
- CDW, Superconductivity and Anomalous Metallic Behavior in 2D Transition Metal Dichalcogenides
- Periodic Density of States Modulations in Superconducting
- Quasi-Particle Spectra, Charge-Density-Wave, Superconductivity and Electron-Phonon Coupling in 2H-NbSe2
- Insulating Ferromagnetism in LaBaCuO: an \textit{Ab Initio} Wannier Function Analysis
- Charge-Density-Wave induced modifications to the quasiparticle self-energy in 2H TaSe2
- Temperature dependent d-d excitations in manganites probed by resonant inelastic x-ray scattering
Cited by in corpus (17)
- Fermi surface nesting and the origin of Charge Density Waves in metals
- Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe
- Pseudogap and charge density waves in two dimensions
- Fermi surface nesting in several transition metal dichalcogenides
- Crystalline and electronic structure of single-layer TaS
- A novel mechanism of charge density wave in a transition metal dichalcogenide
- Pressure-induced metallization and superconducting phase in ReS2
- Zero-bias conductance peak in detached flakes of superconducting 2H-TaS probed by scanning tunneling spectroscopy
- k-resolved susceptibility function of 2H-TaSe2 from angle-resolved photoemission
- GdI_2: A New Ferromagnetic Excitonic Solid?
- Plasmon Evolution and Charge-Density Wave Suppression in Potassium Intercalated Tantalum Diselenide
- First Principles Study of the Electronic and Vibrational Properties of LiNbO2
- Spectral properties in the charge density wave phase of the half-filled Falicov-Kimball Model
- Anomalous Charge Density Wave State Evolution and Dome-like Superconductivity in CuIr2Te4-xSex Chalcogenides
- Quantum liquid with strong orbital fluctuations: the case of a pyroxene family
- Comparison of the Electronic Structures of Two Non-cuprate Layered Transition Metal Oxide Superconductors
- Enhanced superconductivity with possible re-appearance of charge density wave states in polycrystalline CuAgIrTe alloys