空穴量子线中的自组织分数量子化
Self-Organised Fractional Quantisation in a Hole Quantum Wire
摘要：
我们研究了应变锗二维层中一维量子线中的空穴输运。弹道电导特性显示出以n2 e2/h为单位的规则量子化平台，其中n是整数。此外，形成了新的量子化能级，其对应于在存在强平行磁场的情况下n = 1/4减小到1/8的值，所述强平行磁场提升自旋简并度但不量子化波函数。观察到对应于n = 1/32的另一平台，其在平行磁场存在下不改变。这些值表明，该系统的行为，如果收费被细分的值e/2和e/4，可能的机制进行了讨论。
英文摘要：
We have investigated hole transport in one-dimensional quantum wires in strained germanium two-dimensional layers. The ballistic conductance characteristics show the regular quantised plateaux in units of n2e2/h, where n is an integer. Additionally, new quantised levels are formed which correspond to values of n = 1/4 reducing to 1/8 in the presence of a strong parallel magnetic field which lifts the spin degeneracy but does not quantise the wavefunction. A further plateau is observed corresponding to n = 1/32 which does not change in the presence of a parallel magnetic field. These values indicate that the system is behaving as if charge was fractionalised with values e/2 and e/4, possible mechanisms are discussed.
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