Dataset for " Spectral transitions in the non-Hermitian Hatano-Nelson chain induced by a nonlocal rank-one separable potential "

This dataset contains the numerical data used to generate the figures in the manuscript entitled “Spectral properties of impurity-induced states in the non-Hermitian Hatano–Nelson model”.

Each Excel file corresponds to one figure in the manuscript, including spectral roots, PBC bulk ellipse data, phase diagrams, and spatial profiles of impurity-related states.

The model is based on a generalized non-Hermitian Hatano–Nelson chain with a rank-one directional separable impurity. The parameters and column descriptions are provided within each Excel file in dedicated README sheets.