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arXiv 1004.0787cond-mat.mes-hall
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双量子霍尔效应的相位边界。II

On the Phase Boundaries of the Integer Quantum Hall Effect. II

S. S. Murzin

摘要:

本文指出,许多文献中关于用量子化霍尔电导率$σ_{xy}^{q}$ $\geq 3e^{2}/h$观测绝缘相和整数量子霍尔效应相之间的转变的说法是不合理的。在这些工作中,在$ω_{c}τ\approx 1$的对角电阻率在不同温度下的磁场依赖性的交叉点被错误地识别为相变的临界点。实际上,这些交叉点是由于对电导率的量子修正引起的导数$dρ_{xx}/dT$的符号变化。

英文摘要:

It is shown that the statements about the observation of the transitions between the insulating phase and the integer quantum Hall effect phases with the quantized Hall conductivity $σ_{xy}^{q}$ $\geq 3e^{2}/h$ made in a number of works are unjustified. In these works, the crossing points of the magnetic field dependences of the diagonal resistivity at different temperatures at $ω_{c}τ\approx 1$ have been misidentified as the critical points of the phase transitions. In fact, these crossing points are due to the sign change of the derivative $dρ_{xx}/dT$ owing to the quantum corrections to the conductivity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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