Signatures of spin-orbit interaction in transport properties of finite carbon nanotubes in a parallel magnetic field

被引：32

作者：

del Valle, Miriam ^{[1
]}

Marganska, Magdalena ^{[1
]}

Grifoni, Milena ^{[1
]}

机构：

[1] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

来源：

PHYSICAL REVIEW B | 2011年 / 84卷 / 16期

关键词：

QUANTUM INTERFERENCE; ELECTRONS; STATES;

D O I：

10.1103/PhysRevB.84.165427

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The transport properties of finite nanotubes placed in a magnetic field parallel to their axes are investigated. Upon including spin-orbit coupling and curvature effects, two main phenomena are analyzed that crucially depend on the tube's chirality: (i) Finite carbon nanotubes in a parallel magnetic field may present a suppression of current due to the localization at the edges of otherwise conducting states. This phenomenon occurs due to the magnetic-field-dependent open boundary conditions obeyed by the carbon nanotube's wave functions. The transport is fully suppressed above threshold values of the magnetic field, which depend on the nanotube chirality, length, and on the spin-orbit coupling. (ii) Reversible spin-polarized currents can be obtained upon tuning the magnetic field, exploiting the curvature-induced spin-orbit splitting.

引用

页数：13

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