Optoelectronics of inverted type-I CdS/CdSe core/crown quantum ring

Quantum spin Hall effect in inverted type-II semiconductors.

The quantum spin Hall (QSH) state is a topologically nontrivial state of quantum matter which preserves time-reversal symmetry; it has an energy gap in the bulk, but topologically robust gapless states at the edge. Recently, this novel effect has been predicted and observed in HgTe quantum wells and in this Letter we predict a similar effect arising in Type-II semiconductor quantum wells made f...

I Inverted Index Compression

The data structure at the core of nowadays largescale search engines, social networks, and storage architectures is the inverted index. Given a collection of documents, consider for each distinct term t appearing in the collection the integer sequence `t , listing in sorted order all the identifiers of the documents (docIDs in the following) in which the term appears. The sequence `t is called ...

Type II GaSb quantum ring solar cells under concentrated sunlight.

A type II GaSb quantum ring solar cell is fabricated and measured under the concentrated sunlight. The external quantum efficiency confirms the extended absorption from the quantum rings at long wavelength coinciding with the photoluminescence results. The short-circuit current of the quantum ring devices is 5.1% to 9.9% more than the GaAs reference's under various concentrations. While the qua...

On Type-I Quantum Affine Superalgebras

The type-I simple Lie-superalgebras are sl(m|n) and osp(2|2n). We study the quantum deformations of their untwisted affine extensions Uq(sl(m|n) (1)) and Uq(osp(2|2n) (1)). We identify additional relations between the simple generators (“extra q-Serre relations”) which need to be imposed to properly defineUq(sl(m|n) (1)) and Uq(osp(2|2n) (1)). We present a general technique for deriving the spe...

Nanocrystal Optoelectronics: from Solution-Processed Quantum Dots to Wells