On the Magnetic Excitation Spectra of High Tc Cu Oxides up to the Energies far above the Resonance Energy

Details On the Magnetic Excitation Spectra of High Tc Cu Oxides up to the Energies far above the Resonance Energy On the Magnetic Excitation Spectra of High Tc Cu Oxides up to the Energies far above the Resonance Energy

2004-09-27

arxiv.org/abs/cond-mat/0409675v1

J. Phys. Soc. Jpn. 74 (2005) No.1 275.

Physics

Condensed Matter

Superconductivity

14 pages, 5 figures

Scientific paper

10.1143/JPSJ.74.275

Magnetic excitation spectra c"(q,w) of YBa2Cu3Oy and La214 systems have been studied. For La1.88Sr0.12CuO4, c"(q,w) have been measured up to ~30 meV and existing data have been analyzed up to the energy w~150 meV by using the phenomenological expression of the generalized magnetic susceptibility c(q,w)=c0(q,w)/{1+J(q)c0(q,w)}, where c0(q,w) is the susceptibility of the electrons without the exchange coupling J(q) among them. In the relatively low energy region up to slightly above the resonance energy Er, it has been reported by the authors' group that the expression can explain characteristics of the q- and w-dependence of the spectra of YBa2Cu3Oy (YBCO or YBCOy). Here, it is also pointed out that the expression can reproduce the rotation of four incommensurate peaks of c"(q,w) within the a*-b* plane about (p/a, p/a) {or so-called (p, p)} point by 45 degree, which occurs as w goes to the energy region far above Er from E below Er. For La2-xSrxCuO4 and La2-xBaxCuO4, agreements between the observed results and the calculations are less satisfactory than for YBCO, indicating that we have to take account of the existence of the "stripes" to consistently explain the observed c"(q,w) of La214 system especially near x=1/8.

Affiliated with

Also associated with

No associations

Rating

On the Magnetic Excitation Spectra of High Tc Cu Oxides up to the Energies far above the Resonance Energy 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 On the Magnetic Excitation Spectra of High Tc Cu Oxides up to the Energies far above the Resonance Energy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Magnetic Excitation Spectra of High Tc Cu Oxides up to the Energies far above the Resonance Energy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-447652