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

Recently, log-periodic quantum oscillations have been detected in topologicalmaterials zirconium pentatelluride (ZrTe5) and hafnium pentatelluride (HfTe5),displaying intriguing discrete scale invariance (DSI) characteristic. Incondensed materials, the DSI is considered to be related to the quasi-boundstates formed by massless Dirac fermions with strong Coulomb attraction,offering a feasible platform to study the long-pursued atomic-collapsephenomenon. Here, we demonstrate that a variety of atomic vacancies in thetopological material HfTe5 can host the geometric quasi-bound states with DSIfeature, resembling the artificial supercritical atom collapse. The density ofstates of these quasi-bound states are enhanced and the quasi-bound states arespatially distributed in the "orbitals" surrounding the vacancy sites, whichare detected and visualized by low-temperature scanning tunnelingmicroscope/spectroscopy (STM/S). By applying the perpendicular magnetic fields,the quasi-bound states at lower energies become wider and eventually invisible,meanwhile the energies of quasi-bound states move gradually towards the Fermienergy (EF). These features are consistent with the theoretical prediction of amagnetic-field-induced transition from supercritical to subcritical states. Thedirect observation of geometric quasi-bound states sheds light on the deepunderstanding of the DSI in quantum materials.

Discrete scale invariance of the quasi-bound states at atomic vacancies in a topological material