Journal
PHYSICAL REVIEW B
Volume 75, Issue 6, Pages -Publisher
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevB.75.064511
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Due to the lack of both parity and time-reversal symmetries, the Rashba superconductors CePt3Si, CeRhSi3, and CeIrSi3, in the presence of a magnetic field, are unstable to helical (single plane wave) order. We develop a microscopic theory for such superconductors and examine the stability of this helical phase. We show that the helical phase typically occupies most of the magnetic field-temperature phase diagram. However, we also find that this phase is sometimes unstable to a multiple-q phase (loosely called a stripe phase), in which both the magnitude and the phase of the order parameter are spatially varying. We find the position of this helical to multiple-q phase transition. We further examine the density of states and identify features unique to the helical phase.
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