Periodic surface modulation of $(LaSe)_{1.14}(NbSe_2)$ observed by scanning tunneling microscopy
Ondrej \v{S}ofranko, Raphael Leriche, Alexandra Palacio Morales,, Tristan Cren, Shunsuke Sasaki, Laurent Cario, Pavol Szab\'o, Peter Samuely, and Tomas Samuely
TL;DR
This study uses scanning tunneling microscopy to reveal a surface modulation in $(LaSe)_{1.14}(NbSe_2)$ with a doubled period, comparing it to strain-induced charge density waves in $NbSe_2$.
Contribution
It reports the observation of a periodic surface modulation in a layered compound, expanding understanding of surface phenomena in transition metal dichalcogenides.
Findings
Surface modulation with doubled period observed in $(LaSe)_{1.14}(NbSe_2)$
Comparison made with strain-induced charge density waves in $NbSe_2$
Fourier analysis confirms the periodicity alteration
Abstract
Fourier transformation of atomically resolved STM topography of revealed a surface modulation along the hexagonal surface lattice of layer, but with a two times larger period. We compare it to the modified charge density wave found on plain under strain.
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