Pseudo diamagnetism of four component exciton condensates

Abstract

We analyze the spin structure of the ground state of four-component exciton condensates in coupled quantum wells as a function of spin-dependent interactions and applied magnetic field. The four components correspond to the degenerate exciton states characterized by $\pm 2$ and $\pm 1$ spin projections to the axis of the structure. We show that in a wide range of parameters, the chemical potential of the system increases as a function of magnetic field, which manifests a pseudo-diamagnetism of the system. The transitions to polarized two- and one-component condensates can be of the first-order in this case. The predicted effects are caused by energy conserving mixing of $\pm 2$ and $\pm 1$ excitons.

4 pages, 2 figures

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Cited by in corpus (8)

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• Spin-orbit coupled cold exciton condensates
• Ballistic spin transport in exciton gases
• Roton-maxon spectrum and instability for weakly interacting dipolar excitons in a semiconductor layer
• Compensation of Dipolar-Exciton Spin Splitting in Magnetic Field
• Vortices in spinor cold exciton condensates with spin-orbit interaction
• Anisotropic superfluidity of two-dimensional excitons in a periodic potential
• Mean-field description of multicomponent exciton-polariton superfluids