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arXiv 0709.0226cond-mat.mes-hall
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开量子环中电子波函数的成像

Imaging Electron Wave Functions Inside Open Quantum Rings

F. Martins, B. Hackens, M. G. Pala, T. Ouisse, H. Sellier, X. Wallart, S. Bollaert, A. Cappy, J. Chevrier, V. Bayot, S. Huant

摘要:

结合扫描门显微镜(SGM)的实验和模拟,我们展示了嵌入介观量子环(QR)中的电子概率密度$|Ψ|^{2}(x,y)$的低温成像。尖端诱导的电导调制与Aharonov-Bohm效应具有相同的温度依赖性,表明它们起源于电子波函数干扰。$|Ψ|^{2}(x,y)$和SGM电导图的模拟再现了主要的实验观察结果,并将SGM图像中的条纹与$|Ψ|^{2}(x,y)$联系起来。

英文摘要:

Combining Scanning Gate Microscopy (SGM) experiments and simulations, we demonstrate low temperature imaging of electron probability density $|Ψ|^{2}(x,y)$ in embedded mesoscopic quantum rings (QRs). The tip-induced conductance modulations share the same temperature dependence as the Aharonov-Bohm effect, indicating that they originate from electron wavefunction interferences. Simulations of both $|Ψ|^{2}(x,y)$ and SGM conductance maps reproduce the main experimental observations and link fringes in SGM images to $|Ψ|^{2}(x,y)$.

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