Helical Modes in Carbon Nanotubes Generated by Strong Electric Fields

Jelena Klinovaja; Manuel J. Schmidt; Bernd Braunecker; Daniel Loss

doi:10.1103/PhysRevLett.106.156809

Helical Modes in Carbon Nanotubes Generated by Strong Electric Fields

Jelena Klinovaja^*, Manuel J. Schmidt, Bernd Braunecker, Daniel Loss

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Helical modes, conducting opposite spins in opposite directions, are shown to exist in metallic armchair nanotubes in an all-electric setup. This is a consequence of the interplay between spin-orbit interaction and strong electric fields. The helical regime can also be obtained in chiral metallic nanotubes by applying an additional magnetic field. In particular, it is possible to obtain helical modes at one of the two Dirac points only, while the other one remains gapped. Starting from a tight-binding model we derive the effective low-energy Hamiltonian and the resulting spectrum.

Original language	English
Article number	156809
Number of pages	4
Journal	Physical Review Letters
Volume	106
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.106.156809
Publication status	Published - 15 Apr 2011

Keywords

DOUBLE-QUANTUM DOTS
SPIN

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10.1103/PhysRevLett.106.156809

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title = "Helical Modes in Carbon Nanotubes Generated by Strong Electric Fields",

abstract = "Helical modes, conducting opposite spins in opposite directions, are shown to exist in metallic armchair nanotubes in an all-electric setup. This is a consequence of the interplay between spin-orbit interaction and strong electric fields. The helical regime can also be obtained in chiral metallic nanotubes by applying an additional magnetic field. In particular, it is possible to obtain helical modes at one of the two Dirac points only, while the other one remains gapped. Starting from a tight-binding model we derive the effective low-energy Hamiltonian and the resulting spectrum.",

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AU - Klinovaja, Jelena

AU - Schmidt, Manuel J.

AU - Braunecker, Bernd

AU - Loss, Daniel

PY - 2011/4/15

Y1 - 2011/4/15

N2 - Helical modes, conducting opposite spins in opposite directions, are shown to exist in metallic armchair nanotubes in an all-electric setup. This is a consequence of the interplay between spin-orbit interaction and strong electric fields. The helical regime can also be obtained in chiral metallic nanotubes by applying an additional magnetic field. In particular, it is possible to obtain helical modes at one of the two Dirac points only, while the other one remains gapped. Starting from a tight-binding model we derive the effective low-energy Hamiltonian and the resulting spectrum.

AB - Helical modes, conducting opposite spins in opposite directions, are shown to exist in metallic armchair nanotubes in an all-electric setup. This is a consequence of the interplay between spin-orbit interaction and strong electric fields. The helical regime can also be obtained in chiral metallic nanotubes by applying an additional magnetic field. In particular, it is possible to obtain helical modes at one of the two Dirac points only, while the other one remains gapped. Starting from a tight-binding model we derive the effective low-energy Hamiltonian and the resulting spectrum.

KW - DOUBLE-QUANTUM DOTS

KW - SPIN

U2 - 10.1103/PhysRevLett.106.156809

DO - 10.1103/PhysRevLett.106.156809

M3 - Article

SN - 0031-9007

VL - 106

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

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ER -

Helical Modes in Carbon Nanotubes Generated by Strong Electric Fields

Abstract

Keywords

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