TY - JOUR
T1 - The formation of a one-dimensional van der Waals selenium crystal from the three-dimensional amorphous phase
T2 - A spectroscopic signature of van der Waals bonding
AU - Krbal, Milos
AU - Kolobov, Alexander V.
AU - Fons, Paul
AU - Saito, Yuta
AU - Belev, George
AU - Kasap, Safa
N1 - Publisher Copyright:
© 2022 Author(s).
PY - 2022/1/17
Y1 - 2022/1/17
N2 - Trigonal selenium is a prototypical one-dimensional (1D) van der Waals (vdW) solid, where covalently bonded helical chains are held together by weaker vdW forces. In this work, we have studied structural transformation from a three-dimensional amorphous phase of non-interacting Se chains into a 1D vdW crystal using x-ray absorption spectroscopy. The crystallization process and establishment of vdW interaction are accompanied by elongation and weakening of covalent Se-Se bonds. We have found a unique signature in the x-ray absorption near-edge structure spectrum that is associated with vdW bonds and can be used to identify the formation of the latter. We believe that a similar approach can be used to study other 1D vdW solids, such as transition-metal trichalcogenides, and particularly stress the usefulness of x-ray absorption spectroscopy to identify vdW bonds.
AB - Trigonal selenium is a prototypical one-dimensional (1D) van der Waals (vdW) solid, where covalently bonded helical chains are held together by weaker vdW forces. In this work, we have studied structural transformation from a three-dimensional amorphous phase of non-interacting Se chains into a 1D vdW crystal using x-ray absorption spectroscopy. The crystallization process and establishment of vdW interaction are accompanied by elongation and weakening of covalent Se-Se bonds. We have found a unique signature in the x-ray absorption near-edge structure spectrum that is associated with vdW bonds and can be used to identify the formation of the latter. We believe that a similar approach can be used to study other 1D vdW solids, such as transition-metal trichalcogenides, and particularly stress the usefulness of x-ray absorption spectroscopy to identify vdW bonds.
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U2 - 10.1063/5.0080133
DO - 10.1063/5.0080133
M3 - Article
AN - SCOPUS:85123822271
SN - 0003-6951
VL - 120
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 3
M1 - 033103
ER -