Periodic surface modulation of $(LaSe)_{1.14}(NbSe_2)$ observed by scanning tunneling microscopy


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Fourier transformation of atomically resolved STM topography of $(LaSe)_{1.14}(NbSe_2)$ revealed a surface modulation along the hexagonal surface lattice of $NbSe_2$ layer, but with a two times larger period. We compare it to the modified charge density wave found on plain $NbSe_2$ under strain.

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