Diamond Publications - Search Results

Search Again...

These results only include publications that have been reviewed and processed by Diamond Light Source. To also view papers that have not yet been processed click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

One item found (0 items not approved).

Instruments / Technical Area	Publication Details	Published	Actions
I05-ARPES	A novel artificial condensed matter lattice and a new platform for one-dimensional topological phases Ilya Belopolski , Su-Yang Xu , Nikesh Koirala , Chang Liu , Guang Bian , Vladimir N. Strocov , Guoqing Chang , Madhab Neupane , Nasser Alidoust , Daniel Sanchez , Hao Zheng , Matthew Brahlek , Victor Rogalev , Timur Kim , Nicholas C. Plumb , Chaoyu Chen , François Bertran , Patrick Le Fèvre , Amina Taleb-Ibrahimi , Maria-Carmen Asensio , Ming Shi , Hsin Lin , Moritz Hoesch , Seongshik Oh , M. Zahid Hasan Science Advances 3 DOI: 10.1126/sciadv.1501692 Diamond Proposal Number(s): [11742] Open Access Show Abstract ▼ Abstract: Engineered lattices in condensed matter physics, such as cold-atom optical lattices or photonic crystals, can have properties that are fundamentally different from those of naturally occurring electronic crystals. We report a novel type of artificial quantum matter lattice. Our lattice is a multilayer heterostructure built from alternating thin films of topological and trivial insulators. Each interface within the heterostructure hosts a set of topologically protected interface states, and by making the layers sufficiently thin, we demonstrate for the first time a hybridization of interface states across layers. In this way, our heterostructure forms an emergent atomic chain, where the interfaces act as lattice sites and the interface states act as atomic orbitals, as seen from our measurements by angle-resolved photoemission spectroscopy. By changing the composition of the heterostructure, we can directly control hopping between lattice sites. We realize a topological and a trivial phase in our superlattice band structure. We argue that the superlattice may be characterized in a significant way by a one-dimensional topological invariant, closely related to the invariant of the Su-Schrieffer-Heeger model. Our topological insulator heterostructure demonstrates a novel experimental platform where we can engineer band structures by directly controlling how electrons hop between lattice sites.	Mar 2017

Instruments / Technical Area

Publication Details

Published

Actions

I05-ARPES

A novel artificial condensed matter lattice and a new platform for one-dimensional topological phases