Anomalous Nematic States in High Half-Filled Landau Levels.,Physical Review Letters

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Anomalous Nematic States in High Half-Filled Landau Levels.
Physical Review Letters ( IF 8.1 ) Pub Date : 2020-02-14 , DOI: 10.1103/physrevlett.124.067601
X Fu ₁ , Q Shi ₁ , M A Zudov ₁ , G C Gardner _{2,

3} , J D Watson _{3,

4} , M J Manfra _{2,

3,

4,

5} , K W Baldwin ₆ , L N Pfeiffer ₆ , K W West ₆

Affiliation

It is well established that the ground states of a two-dimensional electron gas with half-filled high (N≥2) Landau levels are compressible charge-ordered states, known as quantum Hall stripe (QHS) phases. The generic features of QHSs are a maximum (minimum) in a longitudinal resistance R_{xx} (R_{yy}) and a nonquantized Hall resistance R_{H}. Here, we report on emergent minima (maxima) in R_{xx} (R_{yy}) and plateaulike features in R_{H} in half-filled N≥3 Landau levels. Remarkably, these unexpected features develop at temperatures considerably lower than the onset temperature of QHSs, suggestive of a new ground state.

中文翻译：

高半填装的朗道水平上的异常向列态。

公认的是，半填充高（N≥2）Landau能级的二维电子气的基态是可压缩的电荷有序态，称为量子霍尔条纹（QHS）相。QHS的一般特征是纵向电阻R_ {xx}（R_ {yy}）的最大值（最小值）和未量化的霍尔电阻R_ {H}。在这里，我们报告了R_ {xx}（R_ {yy}）中出现的最小值（最大值）和R_ {H}中处于半填充N≥3Landau水平的高原样特征。值得注意的是，这些意想不到的特性会在比QHS的起始温度低得多的温度下产生，这表明存在新的基态。

更新日期：2020-02-14

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