Kondo effects in small-bandgap carbon nanotube quantum dots

Patryk Florków, Damian Krychowski and Stanisław Lipiński

Beilstein J. Nanotechnol. 2020, 11, 1873–1890. https://doi.org/10.3762/bjnano.11.169

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Patryk Florków, Damian Krychowski and Stanisław Lipiński

Beilstein J. Nanotechnol. 2020, 11, 1873–1890. https://doi.org/10.3762/bjnano.11.169

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Florków, P.; Krychowski, D.; Lipiński, S. Beilstein J. Nanotechnol. 2020, 11, 1873–1890. doi:10.3762/bjnano.11.169

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TY  - JOUR
A1  - Florków, Patryk
A1  - Krychowski, Damian
A1  - Lipiński, Stanisław
T1  - Kondo effects in small-bandgap carbon nanotube quantum dots
JF  - Beilstein Journal of Nanotechnology
PY  - 2020///
VL  - 11
SP  - 1873
EP  - 1890
SN  - 2190-4286
DO  - 10.3762/bjnano.11.169
PB  - Beilstein-Institut
JA  - Beilstein J. Nanotechnol.
UR  - https://doi.org/10.3762/bjnano.11.169
KW  - carbon nanotubes
KW  - Kondo effect
KW  - mesoscopic transport
KW  - quantum dots
KW  - valleytronics
N2  - 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.
ER  -

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Scholarly Works

Krychowski, D. Impact of Majorana fermions on the Kondo state in the carbon nanotube quantum dot. Journal of Physics Communications 2025, 9, 25005. doi:10.1088/2399-6528/adb53b

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