Angle-resolved electron energy loss spectroscopy in hexagonal boron nitride

Origin of the excitonic recombinations in hexagonal boron nitride by spatially resolved cathodoluminescence spectroscopy

Electron knock-on damage in hexagonal boron nitride monolayers

J. Kotakoski,1 C. H. Jin,2,3 O. Lehtinen,1 K. Suenaga,2 and A. V. Krasheninnikov1,4 1Materials Physics Division, University of Helsinki, P.O. Box 43, 00014 Helsinki, Finland 2Nanotube Research Center, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8565, Japan 3Department of Materials Science and Engineering, Meijo University, Tenpaku-ku, Nagoya 468-8502, Ja...

Momentum-Dependent Charge Transfer Excitations in Sr2CuO 2Cl2 Angle-Resolved Electron Energy Loss Spectroscopy.

Electron-hole pair excitations in the insulating cuprates Sr2CuO2Cl2 were investigated by angle-resolved electron energy loss spectroscopy. The optically allowed and optically forbidden transitions were observed to be strongly anisotropic in Cu − O2 plane. The former show a large energy dispersion ∼ 1.5eV along [110], and the latter appear at a higher energy position (∼ 4.5eV) only along [100],...

STM Spectroscopy of ultra-flat graphene on hexagonal boron nitride

Graphene has demonstrated great promise for future electronics technology as well as fundamental physics applications because of its linear energy-momentum dispersion relations which cross at the Dirac point[1, 2]. However, accessing the physics of the low density region at the Dirac point has been difficult because of the presence of disorder which leaves the graphene with local microscopic el...

Identifying hexagonal boron nitride monolayers by transmission electron microscopy.

Multislice simulations in the transmission electron microscope (TEM) were used to examine changes in annular-dark-field scanning TEM (ADF-STEM) images, conventional bright-field TEM (BF-CTEM) images, and selected-area electron diffraction (SAED) patterns as atomically thin hexagonal boron nitride (h-BN) samples are tilted up to 500 mrad off of the [0001] zone axis. For monolayer h-BN the contra...