Pressure effect on the charge-density-wave formation in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>2</mml:mn><mml:mi>H</mml:mi><mml:mo>−</mml:mo><mml:mi mathvariant="normal">N</mml:mi><mml:mi mathvariant="normal">b</mml:mi><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Se</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>and correlation between structural instabilities and superconductivity in unstable solids
