Physicists announce graphene’s latest cousin: stanene

Cousin Marriage

It is a great honour to be invited to contribute a lecture to this long-established series* founded to commemorate a very eminent physician of the Bristol Medical School an a member of a family distinguished for services to medicine and to the City over man/ years. I have also seen with particular pleasure that the first Long Fox lecture ^ given by John Beddoe, a pioneer of British anthropology...

Gravity’s Scalar Cousin

The “dilaton”, the Goldstone boson of spontaneously broken conformal field theories (in flat spacetime), is argued to provide a surprisingly provocative scalar analog of gravity. Many precise parallels and contrasts are drawn. In particular, the Equivalence Principle, the Cosmological Constant Problem, and the tension between them is shown to be closely replicated. Also, there is a striking tra...

Graphene and Cousin Systems

Diffusive nature of thermal transport in stanene.

Using the phonon Boltzmann transport formalism and density functional theory based calculations, we show that stanene has a low thermal conductivity. For a sample size of 1 × 1 μm(2) (L × W), the lattice thermal conductivities along the zigzag and armchair directions are 10.83 W m(-1) K(-1) and 9.2 W m(-1) K(-1) respectively, at room temperature, indicating anisotropy in thermal transport. The ...

Duality for Cousin Complexes

We relate the variance theory for Cousin complexes − developed by Lipman, Nayak and the author to Grothendieck duality for Cousin complexes. Specifically for a Cousin complex F on (Y, ∆)—with ∆ a codimension function on a formal scheme Y (noetherian, universally catenary)—and a pseudo-finite type map f : (X, ∆) → (Y, ∆) of such pairs of schemes with codimension functions, we show there is a der...