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Effects of doping on thermally excited quasiparticles in the high-$T_c$ superconducting state | | T. Xiang
; C. Panagopoulos
; | | Date: |
7 Oct 1999 | | Journal: | Physical Review B Vol 61, 6343 (2000) | | Subject: | Superconductivity; Strongly Correlated Electrons | cond-mat.supr-con cond-mat.str-el | | 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. | | Source: | arXiv, cond-mat/9910098 | | Services: | Forum | Review | PDF | Favorites | |
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