中文

Fractons and high-$T_{c}$ superconductivity

强关联电子 2007-05-23 v9 高能物理 - 理论 量子物理

摘要

We consider the concept of fractons in the context of high-TcT_{c} superconductivity. These objects, which carry rational or irrational quantum numbers, are classified into universal classes hh of particles or quasiparticles which obey specific fractal distribution function. We show that the relaxation time associated to Hall conductivity for the superconducting cuprate systems came to out as τHT2\tau_{H}\propto T^{-2}. We also consider the pairing of fractons as a mechanism to produce bosonic systems and therefore superconducting states. For that an effective mass obtained from the propagator of a charge-flux system is considered. In this way, some experimental results of infrared studies of the cuprates for the effective mass, m=me(1+λ)m^*=m_{e}(1+\lambda), compared with our effective mass expression, meff=m(1+s)m_{eff}=m(1+s), show us that the dominant factor for interactions came from the spin. Thus spin flutuactions as a mechanism of high-TcT_{c} superconductivity and fractons as quasiparticles are related. An expression to the low temperature specific heat of a quantum liquid of fractons is also obtained.

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引用

@article{arxiv.cond-mat/9912459,
  title  = {Fractons and high-$T_{c}$ superconductivity},
  author = {Wellington da Cruz and Marcelo Pagotto Carneiro},
  journal= {arXiv preprint arXiv:cond-mat/9912459},
  year   = {2007}
}

备注

8 pages, latex, references added