Incommensurate ground state of double-layer quantum Hall systems
نویسندگان
چکیده
Double-layer quantum Hall systems possess interlayer phase coherence at sufficiently small layer separations, even without interlayer tunneling. When interlayer tunneling is present, application of a sufficiently strong in-plane magnetic field B i.Bc drives a commensurate-incommensurate ~CI! transition to an incommensurate soliton-lattice ~SL! state. We calculate the Hartree-Fock ground-state energy of the SL state for all values of B i within a gradient approximation, and use it to obtain the anisotropic SL stiffness, the KosterlitzThouless melting temperature for the SL, and the SL magnetization. The in-plane differential magnetic susceptibility diverges as uB i2Bcu when the CI transition is approached from the SL state.
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