Spontaneous-decay dynamics in atomically doped carbon nanotubes

2 5 Ja n 20 05 Near - field Electrodynamics of Atomically Doped Carbon Nanotubes ∗

We develop a quantum theory of near-field electrodynamical properties of carbon nanotubes and investigate spontaneous decay dynamics of excited states and van der Waals attraction of the ground state of an atomic system close to a single-wall nanotube surface. Atomic spontaneous decay exhibits vacuum-field Rabi oscillations – a principal signature of strong atomvacuum-field coupling. The strong...

Fractional Flux Periodicity in doped carbon nanotubes

Weak backscattering in deflected doped carbon nanotubes.

Carbon nanotubes (CNTs) are highly sensitive towards dipole molecules, mechanical loads, interfacial contacts, chemical modifications and temperature fluctuations. Their applications are currently limited to electron-field-emission and gas-sensing devices. In fact, CNTs can also be used as strain-sensing elements; for example, variations in CNT resistance with bending strain have been character...

Superconductivity in thin films of boron-doped carbon nanotubes.

Superconductivity in carbon nanotubes (CNTs) is attracting considerable attention. However, its correlation with carrier doping has not been reported. We report on the Meissner effect found in thin films consisting of assembled boron (B)-doped single-walled CNTs (B-SWNTs). We find that only B-SWNT films consisting of low boron concentration leads to evident Meissner effect with Tc=12 K and also...

Metal-Insulator Transition in Doped Single-Wall Carbon Nanotubes

We find strong evidence for a metal-insulator sMId transition in macroscopic single wall carbon nanotube sSWNTd conductors. This is revealed by systematic measurements of resistivity and transverse magnetoresistance sMRd in the ranges 1.9–300 K and 0–9 Tesla, as a function of p-type redox doping. Strongly H2SO4-doped samples exhibit small negative MR, and the resistivity is low and only weakly ...