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The Susceptibility in Cuprates

  • Shigeji Fujita
  • Kei Ito
  • Salvador Godoy
Chapter

The unusual concentration (x) and temperature (T) dependence of the susceptibility \(\chi\) in La\(_{2-x}{\rm Sr}_{x}\)CuO\(_{4}\) is discussed in this chapter. The susceptibility \(\chi\) at 400 K increases with x in the range \(0.04 <x<0.25\) and decreases in the range \(0.25 <x<0.33\). The maximum at \(x=0.25\) is interpreted in terms of the curvature inversion of the O Fermi surface. At the inflection point the density of states is extremely high, which causes \(\chi\) to have a temperature behavior \(\chi=A_{0}+B_{0}/T\) (\(A_{0},B_{0}=\) constant). The Cooper pair (pairon) has no net spin, and hence its spin contribution to \(\chi\)

Keywords

Fermi Surface Cooper Pair Linear Dispersion Relation Copper Plane Spin Contribution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  1. 1.Department of PhysicsState University of New YorkBuffaloUSA
  2. 2.National Center for UniversityTokyoJapan
  3. 3.Department of FísicaUniversidad Nacional Autónoma de MéxicoMéxicoMéxico

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