Composite fermion liquid to Wigner solid transition in the lowest Landau level of zinc oxide
Composite fermion liquid to Wigner solid transition in the lowest Landau level of zinc oxide
复制标题
氧化锌最低朗道能级下复合费米子液体到维格纳固体的转变
DOI：
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发表时间：
2018
影响因子：
16.6
通讯作者：
M. Kawasaki
中科院分区：
文献类型：
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作者：
D. Maryenko;A. McCollam;J. Falson;J. Falson;Y. Kozuka;Y. Kozuka;J. Bruin;J. Bruin;U. Zeitler;M. Kawasaki;M. Kawasaki
由于多体效应，凝聚态系统的成分之间的相互作用可以驱动它通过过多的不同阶段。一个突出的平台，它是一个稀释的二维电子系统在磁场中，复杂地演变通过各种气体，液体和固体相库仑相互作用。本文报道了在复合费米子液体和相邻的磁场诱导相之间发生具有维格纳固体特征的相变的实验观察。实验是在MgZnO/ZnO二维电子系统的最低朗道能级上进行的，该系统同时具有液体和固体的属性.施加在垂直磁场顶部的面内磁场分量将维格纳相进一步延伸到复合费米子液相区域中。我们的观察表明，一个复合费米子液体和维格纳固体之间的直接竞争形成的电子或复合费米子。在二维电子系统中，强库仑相互作用导致新相的形成。在这里，作者观察到两个这些相关的阶段，复合费米子液体和维格纳固体之间的过渡，在氧化锌异质结构。
Interactions between the constituents of a condensed matter system can drive it through a plethora of different phases due to many-body effects. A prominent platform for it is a dilute two-dimensional electron system in a magnetic field, which evolves intricately through various gaseous, liquid and solid phases governed by Coulomb interaction. Here we report on the experimental observation of a phase transition between the composite fermion liquid and adjacent magnetic field induced phase with a character of Wigner solid. The experiments are performed in the lowest Landau level of a MgZnO/ZnO two-dimensional electron system with attributes of both a liquid and a solid. An in-plane magnetic field component applied on top of the perpendicular magnetic field extends the Wigner-like phase further into the composite fermion liquid phase region. Our observations indicate the direct competition between a composite fermion liquid and a Wigner solid formed either by electrons or composite fermions. In two-dimensional electron systems, strong Coulomb interactions lead to the formation of new phases. Here the authors observe a transition between two of these correlated phases, a composite fermion liquid and Wigner solid, in a zinc oxide heterostructure.