Abstract
We study T=0 spin-density-wave transitions in two-dimensional Fermi liquids in which the ordering wave vector Q is such that the tangents to the Fermi line at the points connected by Q are parallel (e.g., Q=2 in a system with a circular Fermi line) and the Fermi line is not flat. We show that the transition is first order if the ordering wave vector Q is not commensurate with a reciprocal lattice vector G, i.e., Q≠G/2. If Q is close to G/2 the transition is weakly first order and an intermediate scaling regime exists; in this regime the 2 susceptibility and observables such as the NMR rates and have scaling forms which we determine.
- Received 6 April 1995
DOI:https://doi.org/10.1103/PhysRevB.52.5563
©1995 American Physical Society