Effects of doping on thermally excited quasiparticles in the high-$T_c$ superconducting state

Abstract

The physical properties of low energy superconducting quasiparticles in high- $T_c$ superconductors are examined using magnetic penetration depth and specific heat experimental data. We find that the low energy density of states of quasiparticles of La${}_{2-x}$Sr${}_x$CuO${}_4$ scales with $(x-x_c)/T_c$ to the leading order approximation, where $x_c$ is the critical doping concentration below which $T_c=0$. The linear temperature term of the superfluid density is renormalized by quasiparticle interactions and the renormalization factor times the Fermi velocity is found to be doping independent.

3 pages, 3 figures, minor change to the content, fig1 is reploted, to appear in Phys Rev B

References in corpus (1)

• The pseudogap in high-temperature superconductors: an experimental survey

Cited by in corpus (2)

• Low energy physical properties of high-Tc superconducting Cu oxides: A comparison between the resonating valence bond and experiments
• Low-frequency spins and the ground state in high-Tc cuprates