arXiv subjects

E. B. Linscott

Publications and source records attributed to E. B. Linscott.

2 recordsLinked to original sources

arXiv2019

Analysis of a capped carbon nanotube (CNT) with linear-scaling density-functional theory

The apex region of a capped (5,5) carbon nanotube (CNT) has been modelled with the DFT package ONETEP, using boundary conditions provided by a classical calculation with a conducting surface in place of the CNT. Results from the DFT solution include the Fermi level and the physical distribution and energies of individual Kohn-Sham orbitals for the CNT tip. Application of an external electric field changes the orbital number of the highest occupied molecular orbital (the HOMO) and consequently changes the distribution of the HOMO on the CNT.

physics.app-ph↗

arXiv2014

Thermally activated local collapse of a flattened dipolar condensate

We consider the metastable dynamics of a flattened dipolar condensate. We develop an analytic model that quantifies the energy barrier to the system undergoing local collapse to form a density spike. We also develop a stochastic Gross-Pitaevskii equation (SGPE) theory for a flatted dipolar condensate, which we use to perform finite temperature simulations verifying the local collapse scenario. We predict that local collapses play a significant role in the regime where rotons are predicted to exist, and will be an important consideration for experiments looking to detect these excitations.

cond-mat.quant-gas↗