Persistent currents in toroidal carbon nanotubes

Lin, Ming–Fa; Chuu, Der–San

doi:10.1103/physrevb.57.6731

Cited by 111 publications

(119 citation statements)

References 23 publications

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“…(5) contribute to strain energy in addition to Eq. (11). Corresponding results are presented in Fig.…”

Section: Strain Energy In Polygonal Nanotorisupporting

confidence: 52%

“…To name just a few, reversible elastic deformation of carbon nanotori has been predicted 7 and experimentally identified 8 , implying potential application in force-sensing devices. Gigantic paramagnetic response 9 , persistent currents [10][11][12] and even molecular anapole moments 13 have been predicted for specific nanotorus geometries. Also, the intricate shape of carbon nanotori can be exploited in the context of host-guest chemistry and physics; for example, megahertz oscillations of a nanotorus mounted on a nanotube 14 and metal-encapsulated nanotori with net magnetic moment 15 have been predicted.…”

Section: Introductionmentioning

confidence: 99%

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Relative stability and local curvature analysis in carbon nanotori

et al. 2015

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We introduce a concise formalism to characterize nanometer-sized tori based on carbon nanotubes and to determine their stability by combining ab initio density functional calculations with a continuum elasticity theory approach that requires only shape information. We find that the high strain energy in nanotori containing only hexagonal rings is significantly reduced in nanotori containing also other polygons. Our approach allows to determine local curvature and link it to local strain energy, which is correlated with local stability and chemical reactivity.

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“…(5) contribute to strain energy in addition to Eq. (11). Corresponding results are presented in Fig.…”

Section: Strain Energy In Polygonal Nanotorisupporting

confidence: 52%

Section: Introductionmentioning

confidence: 99%

Relative stability and local curvature analysis in carbon nanotori

et al. 2015

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“…The orbital magnetic moment perÅ (colour scale) for |µ chem | ≤ 0.3γ, for metallic (top row) armchair (15,15), chiral (19,10), zigzag (24,0) nanotubes, and for semiconducting (bottom row) nanotubes with similar chiralities - (15,14), (19,9) and (25,0). R = 10.2Å, T = 0.…”

Section: Fig 10mentioning

confidence: 99%

Orbital magnetic moments in pure and doped carbon nanotubes

2005

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The unusual band structure of carbon nanotubes (CNs) results in their remarkable magnetic properties. The application of magnetic field parallel to the tube axis can change the conducting properties of the CN from metallic to semiconducting and vice versa. Apart from that B induces (via the Bohm-Aharonov effect) orbital magnetic moments µ orb in the nanotube. These moments are studied both in pure and hole-or electron-doped CNs, isolated or in a circuit. Remarkably, µ orb in pure CNs depends uniquely on their original conducting properties, length, and temperature but it does not depend on the nanotube radius or the particular chirality. In doped nanotubes the magnetic moments can be strongly altered and depend on the radius and chirality. Temperature can even change their character from diamagnetic at low T to paramagnetic at high T . A full electron-hole symmetry in doped tubes is also revealed.

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“…This new quasi-zero-dimensional system has motivated a lot of studies on geometric structures [18][19][20][21][22][23][24][25], electronic structures [26][27][28][29][30], magnetic properties [31][32][33][34][35][36], optical properties [37,38], electronic excitations [39,40], thermal properties [41], and transport properties [42,43]. One of their most interesting properties is that their electronic structures depend on the toroid geometry, such as radius, height, and chiral angle (h).…”

Section: Introductionmentioning

confidence: 99%