Physics – Condensed Matter – Superconductivity
Scientific paper
2009-12-10
Phys. Rev. Lett. 104, 247001 (2010)
Physics
Condensed Matter
Superconductivity
published version
Scientific paper
Using dynamic cluster quantum Monte Carlo simulations, we study the superconducting behavior of a 1/8 doped two-dimensional Hubbard model with imposed uni-directional stripe-like charge density wave modulation. We find a significant increase of the pairing correlations and critical temperature relative to the homogeneous system when the modulation length-scale is sufficiently large. With a separable form of the irreducible particle-particle vertex, we show that optimized superconductivity is obtained for moderate modulation strength due to a delicate balance between the modulation enhanced pairing interaction, and a concomitant suppression of the bare particle-particle excitations by a modulation reduction of the quasi-particle weight.
Alvarez Gonzalo
Maier Th. A.
Schulthess Thomas C.
Summers M.
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