We found that alpha-(BEDT-TTF)(2)I-3 placed under the pressure above 15kbar
is a semiconductor with an extremely narrow gap ( gap energy might be as l
ow as several kelvins). The Hall coefficient which varies 6 orders of magni
tude between 300K and 1K, and a temperature independent conductivity are ke
y properties to understand this material. No such organic conductors nor in
organic conductors are ever known. Anomalous magnetotransport phenomena wer
e observed at low temperatures.