Enhanced thermoelectric performance of PbTe within the orthorhombic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>P</mml:mi><mml:mi>n</mml:mi><mml:mi>m</mml:mi><mml:mi>a</mml:mi></mml:mrow></mml:math>phaseYi Wang, Guangtian Zou, Tian Cui et al.|Physical Review B|2007Cited by 111