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首页> 外文会议>NATO Advanced Study Institute on Theory of Quantum Transport in Metallic and Hybrid Nanostructures; 20030825-29; St.Petersburg(RU) >Signatures of Spin-Charge Separation in Double-Quantum-Wire Tunneling
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Signatures of Spin-Charge Separation in Double-Quantum-Wire Tunneling

机译：双量子线隧道中自旋电荷分离的特征

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摘要

We present evidence for spin-charge separation in the tunneling spectrum of a system consisting of two quantum wires connected by a long narrow tunnel junction at the edge of a GaAs/AlGaAs bilayer heterostructure. Multiple excitation velocities are detected in the system by tracing out electron spectral peaks in the conductance dependence on the applied voltage, governing the energy of tunneled electrons, and the magnetic field, governing the momentum shift along the wires. The boundaries of the wires are important and lead to a characteristic interference pattern in measurements on short junctions. We show that the experimentally observed modulation of the conductance oscillation amplitude as a function of the voltage bias can also be accounted for by spin-charge separation of the elementary excitations in the interacting wires.
机译：我们为系统的隧穿谱中的自旋电荷分离提供证据，该系统由两条量子线组成，该两条量子线由在GaAs / AlGaAs双层异质结构边缘的长而窄的隧道结连接。通过根据电导率对电子光谱峰的依赖关系来检测系统中的多个激发速度，其中电导率取决于所施加的电压，从而控制隧穿电子的能量，而磁场则控制沿导线的动量位移。导线的边界很重要，在短接点的测量中会导致特征性的干涉图样。我们表明，实验观察到的电导振荡幅度作为电压偏置函数的调制也可以通过相互作用导线中基本激励的自旋电荷分离来解释。

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