Transport through a monolayer-tube junction: Sheet-to-tube spin current

IF 2.9 3区物理与天体物理 Q3 NANOSCIENCE & NANOTECHNOLOGY

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-10-01 DOI:10.1016/j.physe.2024.116111

Yuma Kitagawa , Yuta Suzuki , Shin-ichiro Tezuka , Hiroshi Akera

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引用次数: 0

Abstract

We develop a method to calculate the electron flow between an arbitrary atomic monolayer sheet and an arbitrary tube by expressing the corresponding sheet-tube tunneling matrix elements with those between sheets. We use this method to calculate the spin current from a monolayer silicene sheet with sublattice-staggered current-induced spin polarization to a silicene tube. The calculated sheet-to-tube spin current exhibits an oscillation as a function of the tube circumferential length because the Fermi points in the tube cross the Fermi circle in the sheet. Furthermore, the spin current with spin in the out-of-plane direction, which is absent in the sheet-sheet junction (including twisted sheets) with

C_{3}

rotational symmetry, appears in an oscillating form in the tube-sheet junction due to the broken

C_{3}

rotational symmetry. This is an example of the symmetry manipulation which realizes switching a particular component of the spin current.

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通过单层管交界处的传输：片管自旋电流

我们开发了一种计算任意原子单层薄片和任意管子之间电子流的方法，用薄片之间的电子流来表示相应的薄片-管子隧道矩阵元素。我们用这种方法计算了具有亚晶格交错电流诱导自旋极化的单层硅片到硅管之间的自旋电流。由于硅管中的费米点与硅片中的费米圆相交，因此计算出的硅片到硅管的自旋电流会随着硅管圆周长度的变化而摆动。此外，在具有 C3 旋转对称性的片-片交界处（包括扭曲片）中不存在平面外方向的自旋电流，而在管-片交界处，由于 C3 旋转对称性被破坏，这种自旋电流以振荡的形式出现。这是对称操作的一个例子，它实现了自旋电流特定分量的切换。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Physica E-low-dimensional Systems & Nanostructures 物理-纳米科技

CiteScore

7.30

自引率

6.10%

发文量

356

审稿时长

65 days

期刊介绍： Physica E: Low-dimensional systems and nanostructures contains papers and invited review articles on the fundamental and applied aspects of physics in low-dimensional electron systems, in semiconductor heterostructures, oxide interfaces, quantum wells and superlattices, quantum wires and dots, novel quantum states of matter such as topological insulators, and Weyl semimetals. Both theoretical and experimental contributions are invited. Topics suitable for publication in this journal include spin related phenomena, optical and transport properties, many-body effects, integer and fractional quantum Hall effects, quantum spin Hall effect, single electron effects and devices, Majorana fermions, and other novel phenomena. Keywords: • topological insulators/superconductors, majorana fermions, Wyel semimetals; • quantum and neuromorphic computing/quantum information physics and devices based on low dimensional systems; • layered superconductivity, low dimensional systems with superconducting proximity effect; • 2D materials such as transition metal dichalcogenides; • oxide heterostructures including ZnO, SrTiO3 etc; • carbon nanostructures (graphene, carbon nanotubes, diamond NV center, etc.) • quantum wells and superlattices; • quantum Hall effect, quantum spin Hall effect, quantum anomalous Hall effect; • optical- and phonons-related phenomena; • magnetic-semiconductor structures; • charge/spin-, magnon-, skyrmion-, Cooper pair- and majorana fermion- transport and tunneling; • ultra-fast nonlinear optical phenomena; • novel devices and applications (such as high performance sensor, solar cell, etc); • novel growth and fabrication techniques for nanostructures