Thus, the surface of the denser polymorphic crystal can form a layer of less dense crystal because the newly formed crystal-crystal interface is coherent and costs almost no energy.

Han’s team at HKUST proposes that a polymorphic crystalline layer may form on a crystal surface before the crystal-crystal phase transition and names it pre-solid-solid transition. If carbon ...

Photoemission Spectroscopy Using Virtual Photons Emitted by Positron Sticking: A Complementary Probe for Top-Layer Surface Electronic Structures. Physical Review Letters, 2022; 129 (10) DOI: 10. ...