Correlation Effects and Spin Dependent Transport in Carbon Nanostructures

Lipiński, S.; Krychowski, D.

doi:10.12693/aphyspola.126.190

Cited by 2 publications

(4 citation statements)

References 19 publications

(21 reference statements)

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“…Due to their remarkable electronic, transport, mechanical, and magnetic properties carbon nanotubes (CNTs) are of great interest in molecular electronics and spintronics with potential applications, for example, as field-effect transistors, nanoelectromechanical devices, logic gates, spin valves, spin diodes, and spin batteries [1][2][3][4][5][6][7][8][9][10][11]. CNTs are also interesting for fundamental science.…”

Section: Introductionmentioning

confidence: 99%

“…Their study allows for the examination of many basic properties in ranges often not reachable in other systems. Many of the fundamental transport properties were observed in nanotubes, including Coulomb blockade [12,13], Fabry-Perot interference [13,14], Kondo physics [15][16][17][18][19][20][21][22][23][24][25][26][27][28][29], spintronic effects [10,[30][31][32], and induced superconductivity [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

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Kondo effects in small-bandgap carbon nanotube quantum dots

Florków

Krychowski

Lipiński

2020

Beilstein J. Nanotechnol.

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We study the magnetoconductance of small-bandgap carbon nanotube quantum dots in the presence of spin–orbit coupling in the strong-correlations regime. A finite-U slave-boson mean-field approach is used to study many-body effects. Different degeneracies are restored in a magnetic field and Kondo effects of different symmetries arise, including SU(3) effects of different types. Full spin–orbital degeneracy might be recovered at zero field and, correspondingly, the SU(4) Kondo effect sets in. We point out the possibility of the occurrence of electron–hole Kondo effects in slanting magnetic fields, which we predict to occur in magnetic fields with an orientation close to perpendicular. When the field approaches a transverse orientation a crossover from SU(2) or SU(3) symmetry into SU(4) is observed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kondo effects in small-bandgap carbon nanotube quantum dots

Florków

Krychowski

Lipiński

2020

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

show abstract

“…Due to remarkable electronic, transport, mechanical and magnetic properties carbon nanotubes (CNTs) are of great interest in molecular electronics and spintronics with potential applications e.g. as field effect transistors, nanoelectromechanical devices, logic gates, spin valves, spin diodes, spin batteries [1][2][3][4][5][6][7][8][9][10]14]. CNTs are also interesting for fundamental science.…”

Section: Introductionmentioning

confidence: 99%

“…Their study allows examination of many basic properties in the ranges often not reachable in other systems. Many of the fundamental transport properties were observed in nanotubes including Coulomb blockade [15,16], Fabry-Perot interference [16,17], Kondo physics [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], spintronic effects [10][11][12][13] and induced superconductivity [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Kondo effects in small bandgap carbon nanotube quantum dots

Florków

Krychowski

Lipiński

2020

Preprint

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We study magnetoconductance of the small bandgap carbon nanotube quantum dots in the presence of spin-orbit coupling in the strong correlations regime. The finite-U mean field slave boson approach is used to study many-body effects. Different degeneracies are restored in magnetic field and Kondo effects of different symmetries arise including SU(3) effects of different types. Full spinorbital degeneracy might be recovered for zero field and correspondingly SU(4) Kondo effect sets in. We point out on the possibility of the occurrence of electron-hole Kondo effects in slanting magnetic fields, which we predict will occur in the available magnetic fields for orientation of fields close to perpendicular. When the field approaches transverse orientation a crossover from SU(2) or SU(3) symmetry into SU(4) is observed.

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Correlation Effects and Spin Dependent Transport in Carbon Nanostructures

Abstract: The impact of symmetry breaking perturbations on the spin dependent transport through carbon nanotube quantum dots in the Kondo regime is discussed. The proposals of spin lter, spin valve and spin battery are presented.

Cited by 2 publications

References 19 publications

Kondo effects in small-bandgap carbon nanotube quantum dots

Kondo effects in small-bandgap carbon nanotube quantum dots

Kondo effects in small bandgap carbon nanotube quantum dots

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