Spin-dependent transport properties in a single-walled carbon nanotube with mesoscopic Co contacts

Kim, Jae-Ryoung; So, Hye Mi; Kim, Ju‐Jin; Kim, Jinhee

doi:10.1103/physrevb.66.233401

Cited by 69 publications

(60 citation statements)

References 18 publications

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“…Similarly, one can expect multi-probe measurements to provide useful information about spin transport when some of the probes are ferromagnetic [47,48]. We will however focus on the studies of the two-probe geometries since they are the most advanced carried out so far.…”

Section: Contacting Carbon Nanotubes With Ferromagnetic Leadsmentioning

confidence: 99%

Nanospintronics with carbon nanotubes

Cottet

Kontos

Sahoo

et al. 2006

Semicond. Sci. Technol.

111

127

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One of the actual challenges of spintronics is the realization of a spin transistor allowing control of spin transport through an electrostatic gate. In this paper, we report on different experiments which demonstrate gate control of spin transport in a carbon nanotube connected to ferromagnetic leads. We also discuss some theoretical approaches which can be used to analyse spin transport in these systems. We emphasize the roles of the gate-tunable quasi-bound states inside the nanotube and the coherent spin-dependent scattering at the interfaces between the nanotube and its ferromagnetic contacts.

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Section: Contacting Carbon Nanotubes With Ferromagnetic Leadsmentioning

confidence: 99%

Nanospintronics with carbon nanotubes

Cottet

Kontos

Sahoo

et al. 2006

Semicond. Sci. Technol.

111

127

View full text Add to dashboard Cite

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“…In recent years, also spin transport through quantum dots formed by nanotubes, molecular systems or nanoparticles has started to attract attention both experimentally 2,3,4,5,6,7,8 and theoretically. 9,10,11,12,13,14,15,16 One of the motivations for this has been the possibility of using quantum dots with a single spin as qubits, but naturally also a number of fundamental questions arise on how the interplay of spin coherence and interactions influences the transport.…”

Section: Introductionmentioning

confidence: 99%

Noncollinear magnetoconductance of a quantum dot

Pedersen

Thomassen²,

Flensberg³

2005

Phys. Rev. B

105

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We study theoretically the linear conductance of a quantum dot connected to ferromagnetic leads. The dot level is split due to a non-collinear magnetic field or intrinsic magnetization. The system is studied in the non-interacting approximation, where an exact solution is given, and, furthermore, with Coulomb correlations in the weak tunneling limit. For the non-interacting case, we find an anti-resonance for a particular direction of the applied field, non-collinear to the parallel magnetization directions of the leads. The anti-resonance is destroyed by the correlations, giving rise to an interaction induced enhancement of the conductance. The angular dependence of the conductance is thus distinctly different for the interacting and non-interacting cases when the magnetizations of the leads are parallel. However, for anti-parallel lead magnetizations the interactions do not alter the angle dependence significantly.

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“…1,2 Lately their application as building blocks in spintronics has also been addressed. [3][4][5][6][7][8] Nonetheless, the importance of spin-orbit coupling in these systems has long been underestimated. The spin-orbit interaction (SOI) was believed to be very weak, due to the low atomic number Z = 6 of carbon.…”

Section: Introductionmentioning

confidence: 99%

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

2011

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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.

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Spin-dependent transport properties in a single-walled carbon nanotube with mesoscopic Co contacts

Cited by 69 publications

References 18 publications

Nanospintronics with carbon nanotubes

Nanospintronics with carbon nanotubes

Noncollinear magnetoconductance of a quantum dot

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

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