Incommensurate ground state of double-layer quantum Hall systems

Article

关键词: SPONTANEOUS INTERLAYER COHERENCE;    2-DIMENSIONAL ELECTRON-GAS;    COMPRESSIBILITY;    MAGNETIZATION;    TRANSITION;    DENSITY;    ENERGY;    MODES;   

DOI  :  10.1103/PhysRevB.63.125305

来源: SCIE

【 摘 要 】

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-parallel to>B-c 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-parallel to within a gradient approximation, and use it to obtain the anisotropic SL stiffness, the Kosterlitz-Thouless melting temperature for the SL, and the SL magnetization. The in-plane differential magnetic susceptibility diverges as \B-parallel to-B-c\(-1) when the CI transition is approached from the SL state.

【 授权许可】

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