"Fractional Hall effect" . . . . . . . "Fractional quantum Hall effect" . . . . . . . . "fractional quantum Hall liquids" . . . "fractional charges of the electron" . "fractional charge" . "fractional quantum numbers" . "fractional Quantum Hall effects" . "fractional quantum Hall systems" . . . . "fractional quantum Hall state" . "fractional quantum Hall physics" . . . "fractional quantum Hall effect" . . "fractional quantum Hall" . "Fractional quantum Hall effect" . . "Fractional quantum Hall effect (FQHE)" . "quantum Hall fractionalization" .