标题： 多组分二维电子系统中的体积粘度和剪切粘度 显示英文标题

标题： Bulk and shear viscosities in multicomponent 2D electron system

摘要： 我们研究了含有来自砷化镓三重阱中三个不同子带电子的介观样品中的磁输运性质。 在高温下，我们观察到正磁电阻，我们认为这是由于对体黏度敏感的不同种类粒子之间的不平衡引起的。 在低温下，我们发现负磁电阻，这归因于剪切黏度。 通过对磁电阻数据的分析，我们能够确定两种黏度。 值得注意的是，电子体黏度显著大于剪切黏度。 研究流体动力学范围内多组分电子系统提供了进一步探索高体黏度系统物理特性的有趣机会。 显示英文摘要

摘要： We investigated magnetotransport in mesoscopic samples containing electrons from three different subbands in GaAs triple wells. At high temperatures, we observed positive magnetoresistance, which we attribute to the imbalance between different types of particles that are sensitive to bulk viscosities. At low temperatures, we found negative magnetoresistance, attributed to shear viscosity. By analyzing the magnetoresistance data, we were able to determine both viscosities. Remarkably, the electronic bulk viscosity was significantly larger than the shear viscosity. Studying multicomponent electron systems in the hydrodynamic regime presents an intriguing opportunity to further explore the physics in systems with high bulk viscosity.