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We theoretically investigate the spin-orbit interaction of electrons confined in the outer regions of square core-shell nanowires. The polygonal cross section leads to the accumulation of low-energy electrons in the corners and the…

Mesoscale and Nanoscale Physics · Physics 2025-06-04 Anna Sitek , Tudor Gabriel Dumitru , Sigurdur I. Erlingsson , Andrei Manolescu

We consider electrons in tubular nanowires with prismatic geometry and infinite length. Such a model corresponds to a core-shell nanowire with an insulating core and a conductive shell. In a prismatic shell the lowest energy states are…

Mesoscale and Nanoscale Physics · Physics 2018-08-22 Miguel Urbaneja Torres , Anna Sitek , Sigurdur I. Erlingsson , Gunnar Thorgilsson , Vidar Gudmundsson , Andrei Manolescu

We study theoretically the spin-orbit interaction of electrons confined in a tubular semiconductor nanowire, between an inner semiconductor core and an outer metallic extra shell. A band off-offset potential is present at the inner…

Mesoscale and Nanoscale Physics · Physics 2026-05-01 Tudor-Gabriel Dumitru , Anna Sitek , Gunnar Thorgilsson , Sigurdur I. Erlingsson , Andrei Manolescu

We study theoretically the low-energy hole states of Ge/Si core/shell nanowires. The low-energy valence band is quasidegenerate, formed by two doublets of different orbital angular momenta, and can be controlled via the relative shell…

Mesoscale and Nanoscale Physics · Physics 2011-12-06 Christoph Kloeffel , Mircea Trif , Daniel Loss

We present analysis of a single channel interacting quantum wire problem in the presence of spin-orbit interaction. The spin-orbit coupling breaks the spin-rotational symmetry from SU(2) to U(1) and breaks inversion symmetry. The low-energy…

Mesoscale and Nanoscale Physics · Physics 2015-07-28 Nikolaos Kainaris , Sam T. Carr

We consider core-shell nanowires with conductive shell and insulating core, and with polygonal cross section. We investigate the implications of this geometry on Majorana states expected in the presence of proximity-induced…

Mesoscale and Nanoscale Physics · Physics 2017-10-04 Andrei Manolescu , Anna Sitek , Javier Osca , Llorenç Serra , Vidar Gudmundsson , Tudor D. Stanescu

We review the theoretical description of spin-orbit scattering and electron spin resonance in carbon nanotubes. Particular emphasis is laid on the effects of electron-electron interactions. The spin-orbit coupling is derived, and the…

Strongly Correlated Electrons · Physics 2012-09-27 A. De Martino , R. Egger , F. Murphy-Armando , K. Hallberg

We discuss the low energy electronic states in hexagonal rings. These states correspond to the transverse modes in core-shell nanowires built of III-V semiconductors which typically have a hexagonal cross section. In the case of symmetric…

Mesoscale and Nanoscale Physics · Physics 2019-09-04 Anna Sitek , Miguel Urbaneja Torres , Andrei Manolescu

Electrons in atoms possess both spin and orbital degrees of freedom. In non-relativistic quantum mechanics, these are independent, resulting in large degeneracies in atomic spectra. However, relativistic effects couple the spin and orbital…

Mesoscale and Nanoscale Physics · Physics 2008-04-07 F. Kuemmeth , S. Ilani , D. C. Ralph , P. L. McEuen

We calculate the electromagnetic field radiated by tubular nanowires with prismatic geometry and infinite length. The polygonal geometry has implications on the electronic localization; the lowest energy states are localized at the edges of…

Mesoscale and Nanoscale Physics · Physics 2018-04-24 Miguel Urbaneja Torres , Anna Sitek , Vidar Gudmundsson , Andrei Manolescu

The spin-orbit coupling (SOC) in semiconductors is strongly influenced by structural asymmetries, as prominently observed in bulk crystal structures that lack inversion symmetry. Here, we study an additional effect on the SOC: the asymmetry…

Motion of electrons can influence their spins through a fundamental effect called spin-orbit interaction. This interaction provides a way to electrically control spins and as such lies at the foundation of spintronics. Even at the level of…

Mesoscale and Nanoscale Physics · Physics 2015-05-20 S. Nadj-Perge , S. M. Frolov , E. P. A. M. Bakkers , L. P. Kouwenhoven

The effects of geometry on the hosting of Majorana zero modes are explored in core-shell nanowires with a hexagonal core and a triangular shell, and vice versa. The energy interval separating electronic states localized in the corners from…

Mesoscale and Nanoscale Physics · Physics 2020-10-15 Kristjan Ottar Klausen , Anna Sitek , Sigurdur I. Erlingsson , Andrei Manolescu

We review recent theoretical developments about the role of spins, electron-electron interactions, and spin-orbit coupling in metal nanoparticles and semiconductor quantum dots. For a closed system, in the absence of spin-orbit coupling or…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Yuval Oreg , P. W. Brouwer , X. Waintal , Bertrand I. Halperin

A possibility of controlled manipulation of electron spin states has been investigated for a cylindrical two-dimensional electron gas confined in a semiconductor nanotube/cylindrical nanowire with the Rashba spin-orbit interaction. We…

Mesoscale and Nanoscale Physics · Physics 2014-04-03 P. Wójcik , J. Adamowski , M. Wołoszyn , B. J. Spisak

We present a new model for the study of spin-orbit coupling in interacting quasi-one-dimensional systems and solve it exactly to find the spectral properties of such systems. We show that the combination of spin-orbit coupling and…

Mesoscale and Nanoscale Physics · Physics 2009-10-31 A. V. Moroz , K. V. Samokhin , C. H. W. Barnes

Effects of electron-electron and spin-orbit interactions on the ground-state magnetic configuration and on the corresponding thermoelectric and spin thermoelectric properties in zigzag nanoribbons of two-dimensional hexagonal crystals are…

Mesoscale and Nanoscale Physics · Physics 2015-12-09 Michal Wierzbicki , Jozef Barnas , Renata Swirkowicz

We propose and study a spin-orbit interaction based mechanism to actively cool down the torsional vibration of a nanomechanical resonator made by semiconductor materials. We show that the spin-orbit interactions of electrons can induce a…

Mesoscale and Nanoscale Physics · Physics 2015-05-13 Nan Zhao , D. L. Zhou , Jia-Lin Zhu , C. P. Sun

Spin-orbit coupling is relatively weak for electrons in bulk silicon, but enhanced interactions are reported in nanostructures such as the quantum dots used for spin qubits. These interactions have been attributed to various dissimilar…

The electronic spin-orbit coupling in carbon nanotubes is strongly enhanced by the curvature of the tube surface and has important effects on the single-particle spectrum. Here, we include the full spin-orbit interaction in the formulation…

Mesoscale and Nanoscale Physics · Physics 2010-07-16 A. Schulz , A. De Martino , R. Egger
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