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Hysteretic switching in the magnetoresistance of short-channel, ferromagnetically contacted individual single wall carbon nanotubes is observed, providing strong evidence for nanotube spin transport. By varying the voltage on a capacitively…

介观与纳米尺度物理 · 物理学 2016-08-31 Bhaskar Nagabhirava , Tanesh Bansal , Gamini Sumanasekera , Lei Liu , Bruce W. Alphenaar

Raman spectra and electrical conductance of individual, pristine, suspended, metallic single-walled carbon nanotubes are measured under applied gate potentials. The G- band is observed to downshift with small applied gate voltages, with the…

介观与纳米尺度物理 · 物理学 2015-05-13 Adam W. Bushmaker , Vikram V. Deshpande , Scott Hsieh , Marc W. Bockrath , Stephen B. Cronin

A new kind of three-dimensional carbon allotropes, termed carbon honeycomb (CHC), has recently been synthesized [PRL 116, 055501 (2016)]. Based on the experimental results, a family of graphene networks are constructed, and their electronic…

材料科学 · 物理学 2016-07-20 Yan Gao , Yuanping Chen , Chengyong Zhong , Zhongwei Zhang , Yuee Xie , Shengbai Zhang

The electronic structures of zig-zag and arm-chair single-walled carbon nanotubes interacting with a transitional-metal atomic nanowire of Ni have been determined. The Ni nanowire creates a large electron density of states (DOS)at the Fermi…

超导电性 · 物理学 2009-11-07 Nacir Tit , M. W. C. Dharma-wardana

Carbon nanotubes provide a remarkably versatile system in which to explore the effects of Coulomb interactions in one dimension. The most dramatic effects of strong electron-electron repulsion are *orthogonality catastrophes*. These…

强关联电子 · 物理学 2007-05-23 Leon Balents

The present communication highlights that ac conductivity measurement of the multi-walled carbon nanotubes (MWNTs)-polymer composites is a very promising characterizing tool for qualifying any crude MWNT-sample synthesized by electric arc.…

材料科学 · 物理学 2007-09-26 Soumen Karmakar , Harshada Nagar , J P Jog , S V Bhoraskar , A K Das

The electrical conductivity of the polyimide R-BAPB polymer filled with single-wall carbon nanotubes (CNT) with chirality (5,5) is modeled using a multi-scale approach. The modeling starts with molecular dynamics simulations of…

Room-temperature quasi-ballistic electron transport in double-wall carbon nanotubes (DWNT) is demonstrated. Conductance dependence on the length was measured by submerging DWNTs into liquid mercury. The conductance plots show plateaus,…

材料科学 · 物理学 2009-11-10 Hisashi Kajiura , Houjin Huang , Alexey Bezryadin

We demonstrate single electron addition to different strands of a carbon nanotube rope. Anticrossings of anomalous conductance peaks occur in quantum transport measurements through the parallel quantum dots forming on the individual…

介观与纳米尺度物理 · 物理学 2011-08-02 Karin Goß , Sebastian Smerat , Martin Leijnse , Maarten R. Wegewijs , Claus M. Schneider , Carola Meyer

Spin-dependent coherent quantum transport through carbon nanotubes (CNT) is studied theoretically within a tight-binding model and the Green's function partitioning technique. End-contacted metal/nanotube/metal systems are modelled and next…

介观与纳米尺度物理 · 物理学 2009-11-11 S. Krompiewski

We investigate the quantum transport through a single-wall carbon nanotube connected to leads in the presence of an external radiation field. We analyze the conductance spectrum as a function of the frequency and strength of the field. We…

介观与纳米尺度物理 · 物理学 2009-11-11 P. A. Orellana , M. Pacheco

Carbon nanotubes are a fraction of the size of transistors used in today's best microchips, as it could reduce power demands and heating in next electronics revolution. Present study investigates the electronic and magnetic structure of…

We demonstrate the physical principles for the construction of a nanometer sized magnetoresistance device based on the Aharonov-Bohm effect. The proposed device is made of a short single-walled carbon nanotube (SWCNT) placed on a substrate…

材料科学 · 物理学 2009-11-10 Oded Hod , Eran Rabani , Roi Baer

We report wide-range optical investigations on transparent conducting networks made from separated (semiconducting, metallic) and reference (mixed) single-walled carbon nanotubes, complemented by transport measurements. Comparing the…

材料科学 · 物理学 2015-01-06 H. M. Tohati , A. Pekker , B. A. Pataki , Zs. Szekrenyes , K. Kamaras

In carbon nanotubes, the most abundant defects, caused for example by irradiation or chemisorption treatments, are small perturbing clusters, i.e. bi-site defects, extending over both A and B sites. The relative positions of these…

介观与纳米尺度物理 · 物理学 2015-05-20 M. J. Hashemi , K. Sääskilahti , M. J. Puska

Most of the works devoted so far to the electronic band structure of multiwall nanotubes have been restricted to the case where the individual layers have the same helicity. By comparison, much less is known on the electronic properties of…

凝聚态物理 · 物理学 2009-10-31 Ph. Lambin , V. Meunier , A. Rubio

The fabrication of metallic single-walled carbon nanotube electrodes separated by gaps of typically 20nm width by electron-beam-induced oxidation is studied within an active device configuration. The tube conductance is measured…

We investigate the electronic transport properties of semiconducting ($m$,$n$) carbon nanotubes (CNTs) on the mesoscopic length scale with arbitrarily distributed realistic defects. The study is done by performing quantum transport…

介观与纳米尺度物理 · 物理学 2018-11-26 Fabian Teichert , Andreas Zienert , Jörg Schuster , Michael Schreiber

We investigate linear and nonlinear transport in interacting single wall carbon nanotubes (SWCNTs) that are weakly attached to ferromagnetic leads. For the reduced density matrix of a SWCNT quantum dot, equations of motion which account for…

介观与纳米尺度物理 · 物理学 2007-11-12 Sonja Koller , Leonhard Mayrhofer , Milena Grifoni

We discuss the conductance of a molecular bridge between mesoscopic electrodes supporting low-dimensional transport and bearing an internal structure. As an example for such nanoelectrodes we assume semi-infinite (carbon) nanotubes. In the…

介观与纳米尺度物理 · 物理学 2007-05-23 G. Fagas , G. Cuniberti , K. Richter