Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe$_2$

Details Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe$_2$ Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe$_2$

2005-10-14

arxiv.org/abs/cond-mat/0510390v2

Physics

Condensed Matter

Materials Science

Replacement of Table II values, minor changes to text

Scientific paper

10.1103/PhysRevB.73.205102

We use highly accurate density functional calculations to study the band structure and Fermi surfaces of NbSe2. We calculate the real part of the non-interacting susceptibility, Re chi_0(q), which is the relevant quantity for a charge density wave (CDW) instability and the imaginary part, Im chi_0(q), which directly shows Fermi surface (FS) nesting. We show that there are very weak peaks in Re chi_0(q) near the CDW wave vector, but that no such peaks are visible in Im chi_0(q), definitively eliminating FS nesting as a factor in CDW formation. Because the peak in Re chi_0(q) is broad and shallow, it is unlikely to be the direct cause of the CDW instability. We briefly address the possibility that electron-electron interactions (local field effects) produce additional structure in the total (renormalized) susceptibility, and we discuss the role of electron-ion matrix elements.

Affiliated with

Also associated with

No associations

Rating

Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe$_2$ does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe$_2$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fermi Surface Nesting and the Origin of the Charge Density Wave in NbSe$_2$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-223319