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- National Centre for Radio AstrophysicsIN16 papers
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6 papers · 1 filter
Breakdown of Conventional Winding Number Calculation in One-Dimensional Lattices with Interactions Beyond Nearest Neighbors
Amir Rajabpoor Alisepahi, Siddhartha Sarkar, Kai Sun +1
Topological insulators hold promises to realize exotic quantum phenomena in electronic, photonic, and phononic systems. Conventionally, topological indices, such as winding numbers…
Electronic Selection Rules Controlling Dislocation Glide in bcc Metals
Travis E. Jones, Mark E. Eberhart, Dennis P. Clougherty +1
The validity of the structure-property relationships governing the deformation behavior of bcc metals was brought into question with recent {\it ab initio} density functional studi…
Polarons and Solitons in Jahn-Teller Systems
Dennis P. Clougherty
Using a semiclassical continuum model of an electron in a deformable molecular crystal, some properties of multicomponent generalizations of the polaron--``vector polarons''-- are…
Looking for Design in Materials Design
M. E. Eberhart, D. P. Clougherty
Despite great advances in computation, materials design is still science fiction. The construction of structure-property relations on the quantum scale will turn computational empi…
Vector Polarons in a Degenerate Electron System
Dennis P. Clougherty, Charles A. Foell
We consider a one dimensional model of an electron in a doubly (or nearly) degenerate band that interacts with elastic distortions. We show that the electron equations of motion re…
Endohedral Impurities in Carbon Nanotubes
Dennis P. Clougherty
A generalization of the Anderson model that includes pseudo-Jahn-Teller impurity coupling is proposed to describe distortions of an endohedral impurity in a carbon nanotube. Treati…