Hakioglu, T.Sahin, Mehmet2020-03-262020-03-2620070031-9007https://dx.doi.org/10.1103/PhysRevLett.98.166405https://hdl.handle.net/20.500.12395/21398The condensation of electron-hole pairs is studied at zero temperature and in the presence of a weak spin-orbit coupling (SOC) in coupled quantum wells. Under realistic conditions, a perturbative SOC can have observable effects in the order parameter of the condensate. First, the fermion exchange symmetry is absent. As a result, the condensate spin has no definite parity. Additionally, the excitonic SOC breaks the rotational symmetry yielding a complex order parameter in an unconventional way; i.e., the phase pattern of the order parameter is a function of the condensate density. This is manifested through finite off-diagonal components of the static spin susceptibility, suggesting a new experimental method to confirm an excitonic condensate.en10.1103/PhysRevLett.98.166405info:eu-repo/semantics/openAccessArticle981617501441Q1WOS:000245871200047Q1