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16 papers · 2 filters
Coherently Coupled Carrier and Phonon Dynamics in Elemental Tellurium Probed by XUV Transient Absorption
Jonah R. Adelman, Hugo Laurell, Lauren B. Drescher +3
The narrow bandgap semiconductor elemental tellurium (Te) has a unique electronic structure due to strong spin-orbit splitting and a lack of inversion symmetry of it's helical latt…
Direct measurement of 2DEG states in shallow Si:Sb -layers
Frode S. Strand, Simon P. Cooil, Quinn T. Campbell +13
We investigate the electronic structure of high-density layers of Sb dopants in a silicon host, so-called Si:Sb -layers. We show that, in spite of the known challenges in produc…
Coherent Phonons, Localization and Slow Polaron Formation in Lead-free Gold Perovskite
Sankaran Ramesh, Yonghong Wang, Pavel Chabera +5
Lead-free metal halide perovskites are emerging as less-toxic alternatives to their lead-based counterparts. However, their applicability in optoelectronic devices is limited, and…
Imaging ferroelectric domains with soft X-ray ptychography at the oxygen K-edge
Tim A. Butcher, Nicholas W. Phillips, Chia-Chun Wei +7
The ferroelectric domain structure of a freestanding BiFeO film was visualized by ptychographic dichroic imaging with linearly polarized X-rays at the O K-edge around 530 eV. T…
Engineering two-dimensional materials from single-layer NbS
Timo Knispel, Daniela Mohrenstecher, Carsten Speckmann +10
Starting from a single layer of NbS grown on graphene by molecular beam epitaxy, the single unit cell thick 2D materials NbS-2D and NbS-2D are created using…
Weyl Semimetallic Phase in High Pressure CrSb and Structural Compression Studies of its High Pressure Polymorphs
Carl Jonas Linnemann, Emma Ehrenreich-Petersen, Davide Ceresoli +4
In this study, high pressure synchrotron powder X-ray diffraction is used to investigate the compression of two high pressure polymorphs of \ce{CrSb2}. The first is the \ce{CuAl2}-…