English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Topological insulators embody a new state of matter characterized entirely bythe topological invariants of the bulk electronic structure rather than anyform of spontaneously broken symmetry. Unlike the 2D quantum Hall or quantumspin-Hall-like systems, the three dimensional (3D) topological insulators canhost magnetism and superconductivity which has generated widespread researchactivity in condensed-matter and materials-physics communities. Thus there isan explosion of interest in understanding the rich interplay betweentopological and the broken-symmetry states (such as superconductivity), greatlyspurred by proposals that superconductivity introduced into certain bandstructures will host exotic quasiparticles which are of interest in quantuminformation science. The observations of superconductivity in doped Bi_2Se_3(Cu$_x$Bi$_2$Se$_3$) and doped Bi_2Te_3 (Pd$_x$-Bi$_2$Te$_3$ T$_c$ $\sim$ 5K)have raised many intriguing questions about the spin-orbit physics of theseternary complexes while any rigorous theory of superconductivity remainselusive. Here we present key measurements of electron dynamics insystematically tunable normal state of Cu$_x$Bi$_2$Se$_3$ (x=0 to 12%) gaininginsights into its spin-orbit behavior and the topological nature of the surfacewhere superconductivity takes place at low temperatures. Our data reveal thatsuperconductivity occurs (in sample compositions) with electrons in a bulkrelativistic kinematic regime and we identify that an unconventional dopingmechanism causes the topological surface character of the undoped compound tobe preserved at the Fermi level of the superconducting compound, where Cooperpairing occurs at low temperatures. These experimental observations provideimportant clues for developing a theory of topological-superconductivity in 3Dtopological insulators.

Observation of topological order in a Superconducting doped topological insulator (based on the Bi2Se3 class)