Fractional flux periodicity in doped carbon nanotubes

Fractional Flux Periodicity in doped carbon nanotubes

Fractional flux periodicity in tori made of square lattice

We present a study on fractional flux periodicity of the ground state in planar systems made from a square lattice whose boundary is compacted into a torus. The ground-state energy and persistent currents show a fractional period of the fundamental unit of magnetic flux depending on the twist around the torus axis. We discuss the possible relationship between the twist and genus of a torus. The...

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...

Fractional quantum conductance in carbon nanotubes

Using a scattering technique based on a parametrized linear combination of atomic orbitals Hamiltonian, we calculate the ballistic quantum conductance of multiwall carbon nanotubes. We find that interwall interactions not only block some of the quantum conductance channels, but also redistribute the current nonuniformly over individual tubes across the structure. Our results provide a natural e...

Measuring Fractional Charge in Carbon Nanotubes

The Luttinger model of the one-dimensional Fermi gas is the cornerstone of modern understanding of interacting electrons in one dimension. In fact, the enormous class of systems whose universal behavior is adiabatically connected to it are now deemed Luttinger liquids. Recently, it has been shown that metallic single-walled carbon nanotubes are almost perfectly described by the Luttinger Hamilt...