Large enhancement of the CDW resistivity anomaly and traces of superconductivity in imperfect samples of NbTe4. - Lima, Bruno Sanches de; Chaia, N; Grant, Ted W; Faria, Leandro Rodrigues de; Canova, Julio Cesar; Oliveira, Felipe Souza; Abud, Fábio Santos Alves; Machado, Antonio Jefferson da Silva (Materials chemistry and physics, 2019)