Wigner solids of wide quantum wells near Landau filling ν=1
Wigner solids of wide quantum wells near Landau filling ν=1
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Landau 附近宽量子阱的维格纳固体填充 ν=1
DOI：
10.1103/physrevb.98.195309
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发表时间：
2018
影响因子：
3.7
通讯作者：
Shayegan, M.
中科院分区：
文献类型：
--
作者：
Hatke, A. T.;Liu, Yang;Engel, L. W.;Pfeiffer, L. N.;West, K. W.;Baldwin, K. W.;Shayegan, M.
在整数量子霍尔效应(IQHE)的朗道填充()范围内的微波光谱揭示了由准粒子或空穴组成的维格纳固体(WSS)的钉扎模共振。研究了在磁场作用下，改变样品的密度和倾斜角的情况下，WSS在宽量子阱中的钉扎模式。访问三个不同的WS阶段。一个相，S1，在现象上与在窄QW的IQHEs中观察到的WS相同。第二相S2存在于距离S1更远的地方，并且需要足够大的能量，这意味着S2是由塞曼能量稳定的。根据钉扎模式的消失估算出S1和S2的熔化温度，表现出不同的行为。在最大值时，S2消失，第三相S1a取代S1，也表现出钉扎模式。当WQWIQHE变成一个双组分的Halperin-LaughlinState时，就会发生这种情况。我们将S1a解释为以前没有观察到的激发的WS。
Microwave spectroscopy within the Landau filling () range of the integer quantum Hall effect (IQHE) has revealed pinning mode resonances signifying Wigner solids (WSs) composed of quasiparticles or -holes. We study pinning modes of WSs in wide quantum wells (WQWs) for, varying the density,, and tilting the sample by anglein the magnetic field. Three distinct WS phases are accessed. One phase, S1, is phenomenologically the same as the WS observed in the IQHEs of narrow QWs. The second phase, S2, exists atfurther fromthan S1, and requires a sufficiently largeor, implying S2 is stabilized by the Zeeman energy. The melting temperatures of S1 and S2, estimated from the disappearance of the pinning mode, show different behavior versus. At the largestor, S2 disappears and the third phase, S1A, replaces S1, also exhibiting a pinning mode. This occurs as the WQWIQHE becomes a two-component, Halperin-Laughlinstate. We interpret S1A as a WS of the excitations of, which has not been previously observed.