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The self-assembled, atomically defined, flexible and highly tunable bilayered Au/L-cysteine/Cu(II/I) junctions capable of voltage-gated coherent multiple electron/hole exchange
Nano Futures ( IF 2.5 ) Pub Date : 2021-01-06 , DOI: 10.1088/2399-1984/abc2aa
Dimitri E Khoshtariya 1, 2 , Tinatin D Dolidze 2 , Nikoloz Nioradze 3 , Lasha Laliashvili 1 , Michael Shushanyan 2 , Rudi van Eldik 4, 5, 6
Affiliation  

Contemporary 2D spintronics (spin-based electronics) is a highly interdisciplinary field with numerous elaborated branches, mostly focusing on atomically thin, layered nano-junctions functionalized within ‘dry’ or ‘wet’ cells/cubicles/circuits. The charge carriers’ spin-implicated aspects emerge throughout, albeit the most nanotechnologically promising issue (implying the information and energy transfer/storage aspects) among them, is perhaps the uniquely complex yet robust and rather universal phenomenon of a hybrid inter- and intra-layer Bose–Einstein-like (BE) condensation. However, this issue is still not sufficiently explored, especially, in the framework of the ‘wet’ spintronic domain. Thus, searching for new types of bilayer junctions, and testing of charge/spin allocation and flow within respective nano-devices, is a primary task of current 2D spintronics. In this paper we report on the novel effort towards an extension of the voltage-gated ‘wet’ 2D spintronics enabled through the self-assembling of bilayered Au/L-cysteine/Cu(II/I) junctions, and their rigorous, yet preliminary current-voltage testing towards the hidden collective spin-related manifestations. Our experimental efforts led to a cascade of rare, uniquely combined observations encompassing the temperature induced, directly visible (irreversibly shape-shifting) single-stage transformation of a CV signal (the natural signature of a voltage-gated interlayer Faradaic process). The ultra-thin shape of the resulting CV signal (unavoidably emerging under certain ‘standard’ conditions), turned to be readily explainable by the Laviron’s general statistical formalism, as due to a multi-charge exchange process with the number of transferred electrons/holes ranging within 4 to 16 (per single elementary act) or even out of this range, being extra tunable via the experimental variables. Furthermore, cathodic and anodic peaks of the ‘new’ signal are moderately separated from each other and have nearly similar shapes. Additional experiments with a variation of the voltage scan rate, demonstrated the exceptional, very regular decaying of a number of simultaneously transferred electrons/holes (extracted from the peak-shape analysis) on the voltage scan rate; although the former parameters shows some fluctuational scatter in time, and/or from sample to sample. The subsequent multi-theory-based analysis of a whole scope of obtained voltammetric data, allowed for a preliminary conjecturing of the formation of a hybrid BE-like dipolar superfluid encompassing electron/hole-hosting clusters emerging within the bilayer junction. The specific electron/hole ratio within the layers is switchable (gated) by the interlayer potential (voltage) bias. The clusters’ dimensions, charge distribution and dynamic exchange are reasonably fluctuative and essentially tunable through the applied potential (i.e. the voltage-gating). New experiments are on their way, revealing unlimited future promises of our current endeavor.



中文翻译:

自组装,原子定义,灵活且高度可调的双层Au / L-半胱氨酸/ Cu(II / I)结,能够进行电压门控相干多次电子/空穴交换

当代的2D自旋电子学(基于自旋的电子学)是一个高度跨学科的领域,拥有许多精心设计的分支,主要关注于在“干”或“湿”电池/小室/电路中功能化的原子薄,分层的纳米结。尽管其中最有纳米技术前景(暗示信息和能量转移/存储方面)是电荷载子的自旋相关方面,但它可能是内部和内部混合动力的独特复杂而强大且相当普遍的现象。 Bose-Einstein样(BE)凝结层。然而,这个问题仍然没有得到充分的探讨,特别是在“湿”自旋电子学领域的框架中。因此,寻找新型的双层结,并测试各自纳米器件中的电荷/自旋分配和流量,是当前2D自旋电子学的主要任务。在本文中,我们报告了通过双层Au / L-半胱氨酸/ Cu(II / I)结的自组装及其对电压门控“湿” 2D自旋电子学的扩展所进行的新颖努力,以及它们的严格而初步的研究。电流电压测试针对隐藏的自旋相关表现。我们的实验工作导致了一系列罕见的,独特的组合观察,包括温度诱导的,CV信号的直接可见(不可逆的形变)单级转换(电压门控层间法拉第过程的自然特征)。拉维尔(Laviron)的一般统计形式主义可以很容易地解释所得到的CV信号的超薄形状(在某些“标准”条件下不可避免地出现),因为由于多电荷交换过程,转移的电子/空穴的数量在4到16(每个基本行为)之内,甚至超出此范围,因此可以通过实验变量进行额外调整。此外,“新”信号的阴极和阳极峰彼此之间适度分离,并且具有几乎相似的形状。电压扫描速率变化的其他实验表明,电压扫描速率上同时转移的许多电子/空穴(从峰形分析中提取)异常且非常规则地衰减。尽管前一个参数在时间和/或样本之间显示出一些波动性分散。随后对获得的伏安数据的整个范围进行基于多理论的分析,允许初步推测杂化的BE样偶极超流体的形成,其中包含双层结中出现的电子/空穴聚集簇。层内的特定电子/空穴比可通过层间电势(电压)偏置进行切换(门控)。簇的尺寸,电荷分布和动态交换是合理波动的,并且通过施加的电势(即电压门控)基本上是可调的。新的实验正在进行中,揭示了我们当前努力的无限未来承诺。电荷分布和动态交换在所施加的电势(即电压门控)中合理地波动,并且基本上是可调的。新的实验正在进行中,揭示了我们当前努力的无限未来承诺。电荷分布和动态交换在所施加的电势(即电压门控)中合理地波动,并且基本上是可调的。新的实验正在进行中,揭示了我们当前努力的无限未来承诺。

更新日期:2021-01-06
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