Evidence for Primal sp2 Defects at the Diamond Surface: Candidates for Electron Trapping and Noise Sources

• DOI: 10.1002/admi.201801449
• Publication Date: 2018-12-03T08:16:38Z
• Authors: Alastair Stacey; Nikolai Dontschuk; Jyh‐Pin Chou; David A. Broadway; Alex K. Schenk; Michael J. Sear; Jean‐Philippe Tet...; Alon Hoffman; Steven Prawer; Chris I. Pakes; Anton Tadich; Nathalie P. de Leon; Adam Gali; Lloyd C. L. Holle...
• Keywords: Surface States; Band bending; Quantum sensor

Abstract Many advanced applications of diamond materials are now being limited by unknown surface defects, including in the fields high power/frequency electronics and quantum computing sensing. Of acute interest to researchers worldwide is loss coherence near‐surface nitrogen‐vacancy (NV) centers generation associated magnetic noise at surface. Here for first time presented observation a family primal which suggested as leading cause band‐bending Fermi‐pinning phenomena devices. A combination density functional theory synchrotron‐based X‐ray absorption spectroscopy used show that these defects introduce low‐lying electronic trap states. The effect states modeled on into bulk it shown properties important NV defect affected defects. Due paramount importance center growing number fields, further quantified variety differently‐treated device surfaces, consistent with best‐practice processing techniques literature. identification characterization has wide‐ranging implications devices across many fields.