10 papers
Origin of circular and triangular pores in electron-irradiated hexagonal boron nitride
Umair Javed, Manuel Langle, Vladimir Zobac +9
For nearly two decades, it has been known that electron irradiation of hexagonal boron nitride (hBN) in a transmission electron microscope leads to the formation of triangular pore…
Electron-beam induced methane decomposition for in-situ carbon doping of hexagonal boron nitride
Barbara Maria Mayer, Manuel Längle, Umair Javed +3
Controlling the spatial incorporation of carbon into hexagonal boron nitride (hBN) is essential for engineering optically active defects, yet existing approaches lack nanoscale pre…
Substrate-dependent pore formation in molybdenum disulfide monolayers under ion irradiation
Y. Liebsch, U. Javed, L. Skopinski +11
Ion irradiation is a versatile tool for nanostructuring surfaces, yet the roles of energy deposition and dissipation at the surface and in ultrathin materials remain poorly underst…
Hexatic Phase in Covalent Two-Dimensional Silver Iodide
Thuy An Bui, David Lamprecht, Jacob Madsen +10
According to the Kosterlitz-Thouless-Halperin-Nelson-Young (KTHNY) theory, the transition from a solid to liquid in two dimensions proceeds through an orientationally ordered liqui…
Single photon emitters in hBN: Limitations of atomic resolution imaging and potential sources of error
David Lamprecht, Shrirang Chokappa, Alissa M. Freilinger +9
There is a growing interest in identifying the origin of single-photon emission in hexagonal boron nitride (hBN), with proposed candidates including boron and nitrogen vacancies as…
Atomically clean free-standing two-dimensional materials through heating in ultra-high vacuum
Philipp Irschik, David Lamprecht, Shrirang Chokappa +6
Surface contamination not only influences but in some cases even dominates the measured properties of two-dimensional materials. Although different cleaning methods are often used…