Optical investigation of spin-wave excitations in fractional quantum hall states and of interaction between composite fermions
Optical investigation of spin-wave excitations in fractional quantum hall states and of interaction between composite fermions
复制标题
分数量子霍尔态中自旋波激发和复合费米子之间相互作用的光学研究
DOI：
10.1103/physrevlett.85.3688
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发表时间：
2000
影响因子：
8.6
通讯作者：
Karl Eberl
中科院分区：
文献类型：
--
作者：
I. V. Kukushkin;J. H. Smet;K. Klitzing;Karl Eberl
我们证明了分数态nu = 1/3和nu = 2/3的电子自旋极化的温度依赖性显示激活行为。这项研究使分数量子霍尔自旋翻转间隙的第一次测量。他们被发现是系统的更大的差距相比，同时测量运输。对于nu = 1/3和nu = 1/2，这些自旋翻转间隙允许确定复合费米子相互作用能。该能量作为2D通道的有限宽度的函数进行研究。
We demonstrate that the temperature dependence of the electron spin polarization for the fractional states nu = 1/3 and nu = 2/3 displays activated behavior. This study enables the first measurement of the fractional quantum Hall spin-flip gaps. They are found to be systematically larger in comparison with the gaps simultaneously measured in transport. For nu = 1/3 and nu = 1/2, these spin-flip gaps allow the determination of the composite fermion interaction energy. This energy is investigated as a function of the finite width of the 2D channel.