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首页> 外文期刊>Physica, B. Condensed Matter >Activated conductivities and nonuniversal behaviour in large high mobility Hall bars
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Activated conductivities and nonuniversal behaviour in large high mobility Hall bars

机译：大型高迁移率霍尔杆中的活化电导率和非普遍行为

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Transport measurements were performed on large Hall bars made of high mobility GaAs/AlGaAs heterostructures in the regime of the IQHE. The pre-exponential factors of thermally activated conductivities were found to be close to 2e(2)/h within a narrow range around integer filling factors, The relation between transverse and longitudinal resistivities rho(xy)(rho(xx)) for rho(xx) much less than rho(xy) was found to be strictly linear in the considered range, while showing strong asymmetry with respect to the plateau centres, Nonuniversal behaviour is discussed by emphasizing the importance of small macroscopic density fluctuations in our samples in connection with electron transport within the percolation picture. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 15]
机译：在IQHE方案中，对由高迁移率GaAs / AlGaAs异质结构制成的大型霍尔棒进行了传输测量。发现热激活电导率的指数前因子在整数填充因子附近的狭窄范围内接近2e（2）/ h。横向电阻率与纵向电阻率的关系rho（xy）（rho（xx）） xx）远小于rho（xy）在所考虑的范围内是严格线性的，而相对于高原中心表现出很强的不对称性，因此通过强调样本中宏观宏观密度波动的重要性来讨论非普遍行为，渗流图中的电子传输。 （C）1998 Elsevier Science B.V.保留所有权利。 [参考：15]

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