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arXiv 2402.17461cond-mat.mes-hall
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过渡金属掺杂硅量子点的室温自旋过滤与量子输运

Room Temperature Spin Filtering and Quantum Transport with Transition Metal-Doped Silicon Quantum Dot

Hemant Arora, Arup Samanta

AI总结:

本文通过DFT计算证明Mn掺杂硅量子点具有最高稳定性,并设计出在300K下自旋过滤效率达99.9%且高电导的室温自旋过滤器件。

摘要:

自旋过滤是自旋电子学中的基本操作,能够产生和检测自旋极化载流子。本文提出并从理论上证明,3d过渡金属(TM)掺杂的硅量子点(SiQD)是室温自旋过滤器件的合适候选材料。利用密度泛函理论(DFT),我们研究了TM-SiQD的结构、电子性质和磁行为。计算结果表明,Mn掺杂的SiQD表现出最高的稳定性。所设计的基于Mn掺杂SiQD的自旋过滤器件在300K电极温度下展现出99.9%的自旋过滤效率,同时具有非常高的电导。这一显著效率使其成为室温自旋电子器件的有前景的候选者。

英文摘要:

Spin filtering is a fundamental operation in spintronics, enabling the generation and detection of spin-polarized carriers. Here, we proposed and theoretically demonstrated that a 3d transition metal (TM) doped silicon quantum dot (SiQD) is a suitable candidate for spin filter device at room temperature. Using density functional theory (DFT), we investigate the structure, electronic properties, and magnetic behavior of TM-SiQD. Our calculations demonstrate that Mn-doped SiQD exhibits the highest stability. The designed spin-filter device using Mn-doped SiQD shows a spin-filtering efficiency of 99.9% at 300K electrode temperature along with very high conductance. This remarkable efficiency positions it as a promising candidate for room-temperature spintronic devices.

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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