Joint density of electronic states for one isolated single-wall carbon nanotube studied by resonant Raman scattering

Jório, Ado; Filho, A. G. Souza; Dresselhaus, G.; Dresselhaus, M. S.; Saito, Riichiro; Hafner, Jason H.; Lieber, Charles M.; Matinaga, F. M.; Dantas, M. S. S.; Pimenta, M. A.

doi:10.1103/physrevb.63.245416

Cited by 162 publications

(93 citation statements)

References 22 publications

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“…Smaller broadening, on the other hand, was found in recent experiments by Jorio et al who determined the width of VHSs using resonant Raman scattering from individual SWNTs [ 50]. The latter authors report on very narrow features in the energy dependence of the resonant Raman signal with a broadening of the order of 0.1 meV to 1 meV.…”

Section: Internal Thermalization and E-e Interactionsmentioning

confidence: 67%

Charge-carrier dynamics in single-wall carbon nanotube bundles: a time-domain study

Hertel

Fasel

Moos

2002

Applied Physics A: Materials Science & Processing

114

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Abstract. We present a real-time investigation of ultrafast carrier dynamics in single-wall carbon nanotube bundles using femtosecond time-resolved photoelectron spectroscopy. The experiments allow to study the processes governing the subpicosecond and the picosecond dynamics of non-equilibrium charge-carriers. On the subpicoseond timescale the dynamics are dominated by ultrafast electronelectron scattering processes which lead to internal thermalization of the laser excited electron gas. We find that quasiparticle lifetimes decrease strongly as a function of their energy up to 2.38 eV above the Fermi-level -the highest energy studied experimentally. The subsequent cooling of the laser heated electron gas down to the lattice temperature by electron-phonon interaction occurs on the picosecond time-scale and allows to determine the electronphonon mass enhancement parameter λ. The latter is found to be over an order of magnitude smaller if compared, for example, with that of a good conductor such as copper.PACS 78.47.+; 81.07.De; 78.67.Ch Carbon nanotubes (CNTs) and in particular single-wall carbon nanotubes (SWNTs) have attracted broad interest due to their unique electronic structure and properties. Among the most impressive demonstrations of their potential use in novel technologies are the fabrication of fieldeffect and single-electron transitors from individual or small bundles of SWNTs [ 1,2,3,4]. Other conceivable applications include the implementation of CNTs as emitters in field-emission displays [5,6], ultrastrong fibers [7,8], chemical sensors [9,10], super-capacitors [11] and more. As molecular field effect transistors they have already been implemented into simple logic devices with outstanding transport characteristics and promising scaling behavior [12]. As molecular wires, carbon nanotubes exhibit exceptional resilience with respect to current induced failure and sustain current densities exceeding 10 9 A/cm 2 before * Corresponding Author suffering fatal damage, as reported by various groups [13,14,15,16,17,18]. The carrier scattering processes governing linear and non-linear transport properties in these devices, such as electron-electron (e-e), electron-phonon (eph) or impurity scattering are most frequently investigated by conventional -i.e. time-independent -transport studies.Here we present a complementary time-domain study of carrier dynamics in bundles of single-wall carbon nanotubes using femtosecond time-resolved photoemission. This technique can probe carrier dynamics in real-time and allows to access a wider energy range than typical transport studies. Time-resolved photoemission was developed from twophoton-photoemission [19,20] and has become a powerful technique for studies of surface and bulk electron dynamics on the femtosecond time-scale [21,22,23,24,25,26,27,28]. It has been most frequently used to probe the relaxation of photoexcited electrons with energies ranging from a few hundred meV above the Fermi level up to the vacuum level. Here, we have extended the most commonly us...

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Section: Internal Thermalization and E-e Interactionsmentioning

confidence: 67%

Charge-carrier dynamics in single-wall carbon nanotube bundles: a time-domain study

Hertel

Fasel

Moos

2002

Applied Physics A: Materials Science & Processing

114

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“…This changed behavior may be explained by overlapping of energy bands in nanotube bundles. Scanning tunneling spectroscopy (Wildoer et al, 1998), resonant Raman scattering (Jorio et al, 2001) and optical absorption or emission measurements (Connell et al, 2002) confirmed the electronic DOS in carbon nanotubes. Ouyang et al (Ouyang et al, 2001) experimentally found a pronounced dip in the electronic DOS of a (8, 8) SWCNT at Fermi level inside a bundle, compared to an isolated tube.…”

Section: Characteristics Of a Bundle Of Three Different Types Of Swcntsmentioning

confidence: 82%

Molecular Dynamics Simulation Study on the Mechanical Properties and Fracture Behavior of Single-Wall Carbon Nanotubes

Talukdar¹,

Mitra²

2011

Carbon Nanotubes - Synthesis, Characterization, Applications

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“…3. Knowing d t and E ii allowed the assignment of the measured SWNT as the (18, 0) metallic SWNT (Jorio et al 2001b). By doing the experiment with a tunable laser, one can measure the resonance line shape profile experimentally.…”

Section: Resonance Raman Spectroscopy Of Quasi-one Dimensional Carbonmentioning

confidence: 99%

“…3). Such an experiment was performed for a SWNT with ω RBM = 173.6 cm −1 , i.e., d t = 248/173.6 = 1.43 nm (Jorio et al 2001b). Very accurate values for E ii = 1.655 ± 0.003 eV and = 8 meV were found from Fig.…”

Section: Resonance Raman Spectroscopy Of Quasi-one Dimensional Carbonmentioning

confidence: 99%

Resonance Raman spectroscopy in one-dimensional carbon materials

Dresselhaus

Jório

Pimenta

2006

An. Acad. Bras. Ciênc.

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Brazil has played an important role in the development and use of resonance Raman spectroscopy as a powerful characterization tool for materials science. Here we present a short history of Raman scattering research in Brazil, highlighting the important contributions to the field coming from Brazilian researchers in the past. Next we discuss recent and important contributions where Brazil has become a worldwide leader, that is on the physics of quasi-one dimensional carbon nanotubes. We conclude this article by presenting results from a very recent resonance Raman study of exciting new materials, that are strictly one-dimensional carbon chains formed by the heat treatment of very pure double-wall carbon nanotube samples.

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Joint density of electronic states for one isolated single-wall carbon nanotube studied by resonant Raman scattering

Cited by 162 publications

References 22 publications

Charge-carrier dynamics in single-wall carbon nanotube bundles: a time-domain study

Charge-carrier dynamics in single-wall carbon nanotube bundles: a time-domain study

Molecular Dynamics Simulation Study on the Mechanical Properties and Fracture Behavior of Single-Wall Carbon Nanotubes

Resonance Raman spectroscopy in one-dimensional carbon materials

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