Incommensurate nematic fluctuations in the two-dimensional Hubbard model
arXiv:1203.2887 · doi:10.1103/PhysRevB.86.085113
Abstract
We analyze effective d-wave interactions in the two-dimensional extended Hubbard model at weak coupling and small to moderate doping. The interactions are computed from a renormalization group flow. Attractive d-wave interactions are generated via antiferromagnetic spin fluctuations in the pairing and charge channels. Above Van Hove filling, the d-wave charge interaction is maximal at incommensurate diagonal wave vectors, corresponding to nematic fluctuations with a diagonal modulation. Below Van Hove filling a modulation along the crystal axes can be favored. The nematic fluctuations are enhanced by the nearest-neighbor interaction in the extended Hubbard model, but they always remain smaller than the dominant antiferromagnetic, pairing, or charge density wave fluctuations.
8 pages, 4 figures; figures improved
References in corpus (6)
- Electronic liquid crystal state in the high-temperature superconductor YBCO(6.45)
- Formation of a Nematic Fluid at High Fields in Sr3Ru2O7
- Quantum phase transitions of metals in two spatial dimensions: II. Spin density wave order
- Renormalized mean-field analysis of antiferromagnetism and d-wave superconductivity in the two-dimensional Hubbard model
- Instabilities near the onset of spin density wave order in metals
- Competition of Fermi surface symmetry breaking and superconductivity