Binary switching in a 'symmetric' potential landscape.

Binary switching in a 'symmetric' potential landscape.
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DOI:
10.1038/srep03038
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发表时间:
2013-10-24
期刊:
影响因子:
4.6
通讯作者:
Atulasimha, Jayasimha
Atulasimha, Jayasimha
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Roy, Kuntal;Bandyopadhyay, Supriyo;Atulasimha, Jayasimha

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二进制开关是信息处理的基本构件。双稳二元开关的势能分布是一个“对称”的双势垒。将其从一种状态(一口井)切换到另一种状态的传统方法是将剖面倾斜到所需的状态。在这里,我们提出了一种情况,即使在存在热噪声的情况下,成功切换也不需要这样的倾斜。这种情况的发生是因为交换机本身的内置动态。它不同于人们对二元开关的普遍看法,即在“对称”势的情况下,在存在热噪声的情况下,开关概率为50%。我们的结果,考虑到完整的三维势场,展示了关于二元开关机制的有趣现象。在实验上可行的参数下,我们从理论上证明了具有两个稳定态的形状各向异性单畴磁致伸缩纳米磁体在室温下的电场诱导磁化转换的可能性。
A binary switch is the basic building block for information processing. The potential energy profile of a bistable binary switch is a ‘symmetric' double well. The traditional method of switching it from one state (one well) to the other is to tilt the profile towards the desired state. Here, we present a case, where no such tilting is necessary to switch successfully, even in the presence of thermal noise. This happens because of the built-in dynamics inside the switch itself. It differs from the general perception on binary switching that in a ‘symmetric' potential landscape, the switching probability is 50% in the presence of thermal noise. Our results, considering the complete three-dimensional potential landscape, demonstrate intriguing phenomena on binary switching mechanism. With experimentally feasible parameters, we theoretically demonstrate such intriguing possibility in electric field induced magnetization switching of a shape-anisotropic single-domain magnetostrictive nanomagnet with two stable states at room-temperature.
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