Nodal quasiparticle lifetimes in cuprate superconductors

Dahm T, Hirschfeld PJ, Scalapino DJ, Zhu L (2005)
Physical Review B 72(21).

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
A new generation of angular-resolved photoemission spectroscopy (ARPES) measurements on the cuprate superconductors offers the promise of enhanced momentum and energy resolution. In particular, the energy and temperature dependence of the on-shell nodal (k(x)=k(y)) quasiparticle scattering rate can be studied. In the superconducting state, low-temperature transport measurements suggest that one can describe nodal quasiparticles within the framework of a BCS d-wave model by including forward elastic scattering and spin-fluctuation inelastic scattering. Here, using this model, we calculate the temperature and frequency dependence of the on-shell nodal quasiparticle scattering rate in the superconducting state, which determines the momentum width of the ARPES momentum distribution curves. For a zero-energy quasiparticle at the nodal momentum k(N), both the elastic and inelastic scattering rate show a sudden decrease as the temperature drops below T-c, reflecting the onset of the gap amplitude. At low temperatures the scattering rate decreases as T-3 and approaches a zero-temperature value determined by the elastic impurity scattering. For T > T-c, we find a quasilinear dependence on T. At low reduced temperatures, the elastic scattering rate for the nodal quasiparticles exhibits a quasilinear increase at low energy omega, which arises from elastic scattering processes. The inelastic spin-fluctuation scattering leads to a low-energy omega(3) dependence, which, for omega greater than or similar to 3 Delta(0), crosses over to a quasilinear behavior.
Erscheinungsjahr
Zeitschriftentitel
Physical Review B
Band
72
Zeitschriftennummer
21
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Dahm T, Hirschfeld PJ, Scalapino DJ, Zhu L. Nodal quasiparticle lifetimes in cuprate superconductors. Physical Review B. 2005;72(21).
Dahm, T., Hirschfeld, P. J., Scalapino, D. J., & Zhu, L. (2005). Nodal quasiparticle lifetimes in cuprate superconductors. Physical Review B, 72(21). doi:10.1103/PhysRevB.72.214512
Dahm, T., Hirschfeld, P. J., Scalapino, D. J., and Zhu, L. (2005). Nodal quasiparticle lifetimes in cuprate superconductors. Physical Review B 72.
Dahm, T., et al., 2005. Nodal quasiparticle lifetimes in cuprate superconductors. Physical Review B, 72(21).
T. Dahm, et al., “Nodal quasiparticle lifetimes in cuprate superconductors”, Physical Review B, vol. 72, 2005.
Dahm, T., Hirschfeld, P.J., Scalapino, D.J., Zhu, L.: Nodal quasiparticle lifetimes in cuprate superconductors. Physical Review B. 72, (2005).
Dahm, Thomas, Hirschfeld, PJ, Scalapino, DJ, and Zhu, L. “Nodal quasiparticle lifetimes in cuprate superconductors”. Physical Review B 72.21 (2005).