Physics – Condensed Matter – Superconductivity
Scientific paper
2010-08-12
Phys. Rev. B 82, 184526 (2010)
Physics
Condensed Matter
Superconductivity
Accepted version
Scientific paper
10.1103/PhysRevB.82.184526
Quantum oscillations in a tilted magnetic field offer the possibility of distinguishing singlet versus triplet order parameters in the particle hole channel provided the measurements reflect a putative ``normal'' state of a density wave obtained by applying by high magnetic field at low temperatures. A theoretical analysis is given that compares spin density wave, a singlet $d$-density wave, and a triplet $d$-density wave. While the existence of a spin zero in the oscillation amplitude is a necessary consequence of a singlet order parameter, a triplet order parameter may or may not exhibit a spin zero, making it a quantitative issue that depends on the actual extremal orbits on the Fermi surface. Nonetheless, a theoretical analysis can shed light on the striking recent measurements in $\mathrm{YBa_{2}Cu_{3}O_{6+\delta}}$.
Chakravarty Sudip
Garcia-Aldea David
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