Resonant inelastic X-ray scattering study of overdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$

Details Resonant inelastic X-ray scattering study of overdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$ Resonant inelastic X-ray scattering study of overdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$

2005-06-21

arxiv.org/abs/cond-mat/0506524v2

Phys. Rev. B 72, 224508 (2005)

Physics

Condensed Matter

Superconductivity

7 pages, 7 figures

Scientific paper

10.1103/PhysRevB.72.224508

Resonant inelastic x-ray scattering (RIXS) at the copper K absorption edge has been performed for heavily overdoped samples of La$_{2-x}$Sr$_{x}$CuO$_{4}$ with $x= 0.25$ and 0.30. We have observed the charge transfer and molecular-orbital excitations which exhibit resonances at incident energies of $E_i= 8.992$ and 8.998 keV, respectively. From a comparison with previous results on undoped and optimally-doped samples, we determine that the charge-transfer excitation energy increases monotonically as doping increases. In addition, the $E_i$-dependences of the RIXS spectral weight and absorption spectrum exhibit no clear peak at $E_i = 8.998$ keV in contrast to results in the underdoped samples. The low-energy ($\leq 3$ eV) continuum excitation intensity has been studied utilizing the high energy resolution of 0.13 eV (FWHM). A comparison of the RIXS profiles at $(\pi ~0)$ and $(\pi ~\pi)$ indicates that the continuum intensity exists even at $(\pi ~\pi)$ in the overdoped samples, whereas it has been reported only at $(0 ~0)$ and $(\pi ~0)$ for the $x=0.17$ sample. Furthermore, we also found an additional excitation on top of the continuum intensity at the $(\pi ~\pi)$ and $(\pi ~0)$ positions.

Affiliated with

Also associated with

No associations

Rating

Resonant inelastic X-ray scattering study of overdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$ 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 Resonant inelastic X-ray scattering study of overdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Resonant inelastic X-ray scattering study of overdoped La$_{2-x}$Sr$_{x}$CuO$_{4}$ will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-292941