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Single-walled carbon nanotubes exist in a variety of different geometries, so-called chiralities, that define their electronic properties. Chiral selectivity has been reported in catalytic chemical vapor deposition synthesis experiments,…

Mesoscale and Nanoscale Physics · Physics 2024-06-12 Georg Daniel Förster , Thomas D. Swinburne , Hua Jiang , Esko Kauppinen , Christophe Bichara

Motivated by the possibility of combining spintronics with molecular structures, we investigate the conditions for the appearance of spin-polarization in low-dimensional tubular systems by contacting them to a magnetic substrate. We derive…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 Mauro S. Ferreira , Stefano Sanvito

An external magnetic field is found to have strong effects on the electronic structure of carbon nanotubes. A field-induced metal-insulator transition is predicted for all pure nanotubes. In a weak field, nanotubes exhibit both large…

Condensed Matter · Physics 2009-10-22 Jian Ping Lu

In this letter, we demonstrate a strong dependence of the electrostatic deformation of doubly-clamped single-walled carbon nanotubes on both the field strength and the tube length, using molecular simulations. Metallic nanotubes are found…

Mesoscale and Nanoscale Physics · Physics 2015-05-14 Zhao Wang , Laetitia Philippe

We use Monte Carlo simulation to study the vortex nucleation on magnetic nanodots at low temperature. In our simulations, we have considered a simple microscopic two-dimensional anisotropic Heisenberg model with term to describe the…

Statistical Mechanics · Physics 2010-10-22 S. A. Leonel , I. A. Marques , P. Z. Coura , B. V. Costa

Carbon nanotubes (CNT) belong to the most promising new materials which can in the near future revolutionize the conventional electronics. When sandwiched between ferromagnetic electrodes, the CNT behaves like a spacer in conventional…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 S. Krompiewski

Suspended carbon nanotubes display at cryogenic temperatures a distinct interaction between the quantized longitudinal vibration of the macromolecule and its embedded quantum dot, visible via Franck-Condon conductance side bands in…

Mesoscale and Nanoscale Physics · Physics 2020-09-15 P. L. Stiller , A. Dirnaichner , D. R. Schmid , A. K. Hüttel

We demonstrate gate control of the electronic g-tensor in single and double quantum dots formed along a bend in a carbon nanotube. From the dependence of the single-dot excitation spectrum on magnetic field magnitude and direction, we…

Mesoscale and Nanoscale Physics · Physics 2014-03-24 R. A. Lai , H. O. H. Churchill , C. M. Marcus

In this paper, we propose a characterization of the mechanical response of the linearly elastic shell we associate to a single-wall carbon nanotube of arbitrary chirality. In Bajaj et al. 2013, we gave such a characterization in the case of…

Mathematical Physics · Physics 2015-06-16 Antonino Favata , Paolo Podio-Guidugli

Nanoribbons produced from cutting {\beta}_12-Borophene sheet is investigated by density functional theory. The electronic and magnetic properties of Borophene nanoribbons are studied and found that all considered ribbons are metal which is…

Mesoscale and Nanoscale Physics · Physics 2017-08-11 Sahar Izadi Vishkayi , Meysam Bagheri Tagani

We demonstrate theoretically that an off-resonant circularly polarized electromagnetic field can induce a persistent current in carbon nanotubes, which corresponds to electron rotation about the nanotube axis. As a consequence, the…

Mesoscale and Nanoscale Physics · Physics 2021-06-24 O. V. Kibis , M. V. Boev , V. M. Kovalev

It has been known theoretically that localized states exist around zigzag edges of a graphite ribbon and of a carbon nanotube, whose energy eigenvalues are located between conduction and valence bands. We found that in metallic…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 K. Sasaki , S. Murakami , R. Saito , Y. Kawazoe

We present an overview of strong correlations in single-wall carbon nanotubes, and an introduction to the techniques used to study them theoretically. We concentrate on zigzag nanotubes, although universality dictates that much ofthe theory…

Strongly Correlated Electrons · Physics 2009-11-13 Sam T. Carr

The magnetic moment of an electron gas on the surface of constant negative curvature is investigated. It is shown that the surface curvature leads to the appearance of the region of the monotonic dependence $M(B)$ at low magnetic fields. At…

Mesoscale and Nanoscale Physics · Physics 2009-11-10 D. V. Bulaev , V. A. Margulis

We consider chirality related effects in optical, photogalvanic and electron-transport properties of carbon nanotubes. We show that these properties of chiral nanotubes are determined by terms in the electron effective Hamiltonian…

Mesoscale and Nanoscale Physics · Physics 2009-11-07 E. L. Ivchenko , B. Spivak

Analytic and numerical studies on curved magnetic nano-objects predict numerous exciting effects that can be referred to as magneto-chiral effects, which do not originate from intrinsic Dzyaloshinskii-Moriya interaction or interface-induced…

Edge states in narrow quasi two-dimensional nanostructures determine, to a large extent, their electric, thermoelectric and magnetic properties. Non-magnetic edge states may quite often lead to topological insulator type behavior. However…

Mesoscale and Nanoscale Physics · Physics 2017-10-31 Stefan Krompiewski , Gianaurelio Cuniberti

Quantum anomalous Hall insulators are topologically characterized by non-zero integer Chern numbers, the sign of which depends on the direction of the exchange field that breaks time-reversal symmetry. This feature allows the manipulation…

Mesoscale and Nanoscale Physics · Physics 2024-09-06 Nezhat Pournaghavi , Carlo M. Canali

The nucleation field for infinite magnetic nanotubes, in the case of a magnetic field applied parallel to the long axis of the tubes, is calculated as a function of their geometric parameters and compared with those produced inside the…

Soft Condensed Matter · Physics 2007-10-31 J. Escrig , M. Daub , P. Landeros , K. Nielsch , D. Altbir

We report high-temperature (300-1120 K) magnetization data of Fe and Fe3O4 nanoparticles embedded in multi-walled carbon nanotubes. The magnetic impurity concerntations are precisely determined by both high-energy synchrotron x-ray…

Strongly Correlated Electrons · Physics 2011-07-20 Guo-meng Zhao , Jun Wang , Yang Ren , Pieder Beeli