Anisotropic property in interacting quantum wires embedded in (110) plane

We investigate the theoretically combined effect of spin–orbit interactions and Coulomb interaction on the ground state and transport property of a quantum wire oriented along different crystallographic directions in the (110) plane. We find that the electron’s ground state exhibits phase transition among spin density wave, charge density wave, singlet superconductivity and metamagnetism, which can be controlled by changing the crystallographic orientation, the strengths of the spin–orbit interactions and the Coulomb interaction. The ac conductance exhibits a significant anisotropic behavior and a out-of-plane spin polarization which can be tuned by an in-plane electric field.

Research highlights
► The electron’s ground state in one-dimensional quantum wires could exhibit a spin density wave, charge density wave, singlet superconductivity and metamagnetism.
► These phases can be controlled by changing the crystallographic orientation, the strengths of the spin–orbit interactions and the Coulomb interaction.
► The ac conductance exhibits a significant anisotropic behavior and an out- of-plane spin polarization which can be tuned by an in-plane electric field.