  We theoretically investigate the spin-dependent Seebeck effect in an
Aharonov-Bohm mesoscopic ring in the presence of both Rashba and Dresselhaus
spin-orbit interactions under magnetic flux perpendicular to the ring. We apply
the Green's function method to calculate the spin Seebeck coefficient employing
the tight-binding Hamiltonian. It is found that the spin Seebeck coefficient is
proportional to the slope of the energy-dependent transmission coefficients. We
study the strong dependence of spin Seebeck coefficient on the Fermi energy,
magnetic flux, strength of spin-orbit coupling, and temperature. Maximum spin
Seebeck coefficients can be obtained when the strengths of Rashba and
Dresselhaus spin-orbit couplings are slightly different. The spin Seebeck
coefficient can be reduced by increasing temperature and disorder.
