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arXiv 2012.10118cond-mat.mes-hall
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邻近化纳米线岛的全奇偶性phase diagram

Full parity phase diagram of a proximitized nanowire island

J. Shen, G. W. Winkler, F. Borsoi, S. Heedt, V. Levajac, J. Y. Wang, D. van Driel, D. Bouman, S. Gazibegovic, R. L. M. Op Het Veld, D. Car, J. A. Logan, M. Pend… 展开作者

J. Shen, G. W. Winkler, F. Borsoi, S. Heedt, V. Levajac, J. Y. Wang, D. van Driel, D. Bouman, S. Gazibegovic, R. L. M. Op Het Veld, D. Car, J. A. Logan, M. Pendharkar, C. J. Palmstrom, E. P. A. M. Bakkers, L. P. Kouwenhoven, B. van Heck

摘要:

测量了InSb-Al混合岛的库仑阻塞电导振荡的电荷周期性随栅电压和平行磁场的变化。周期性在磁场的栅极相关值$B^*$处从$2e$改变到$1e$,在增加栅极电压时从高极限减小到低极限。在两个限制之间的栅极电压区域,我们的数值模拟表明是最有前途的定位马约拉纳零模式,我们观察到相关的峰值间距和高度的振荡。对于正栅极电压,具有低$2e$转变是由于非拓扑状态的存在,由于磁场的轨道效应,非拓扑状态的能量快速分散到充电能量以下。我们的测量结果表明,作为定义未来拓扑量子位的先决条件,仔细探索整个可用的相空间的邻近纳米线的重要性。

英文摘要:

We measure the charge periodicity of Coulomb blockade conductance oscillations of a hybrid InSb-Al island as a function of gate voltage and parallel magnetic field. The periodicity changes from $2e$ to $1e$ at a gate-dependent value of the magnetic field, $B^*$, decreasing from a high to a low limit upon increasing the gate voltage. In the gate voltage region between the two limits, which our numerical simulations indicate to be the most promising for locating Majorana zero modes, we observe correlated oscillations of peak spacings and heights. For positive gate voltages, the $2e$-$1e$ transition with low $B^*$ is due to the presence of non-topological states whose energy quickly disperses below the charging energy due to the orbital effect of the magnetic field. Our measurements demonstrate the importance of a careful exploration of the entire available phase space of a proximitized nanowire as a prerequisite to define future topological qubits.

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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