Tip-induced creation and Jahn-Teller distortions of sulfur vacancies in single-layer <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>MoS</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math>
Daniel Jansen, Tfyeche Y. Tounsi, J. Fischer, Arkady V. Krasheninnikov, Thomas Michely, Hannu‐Pekka Komsa, Wouter Jolie
Abstract
Vacancies in semiconducting 2D transition metal dichalcogenides enable studies of quantum phenomena at the nanoscale, such as single photon emission or Jahn-Teller distortions. Here, the authors show that a scanning tunneling microscope can enable local creation of single vacancies as well as vacancy dimers in single-layer MoS${}_{2}$. Charging the vacancy through local gating leads to two distinct types of Jahn-Teller distortions, in quantitative agreement with $a\phantom{\rule{0}{0ex}}b$ $i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o$ calculations. Strong hybridization within vacancy dimers illustrates the potential for artificial defect lattices with tailored electronic band structures.