Lifshitz transition in the phase diagram of two-leg <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>t</mml:mi><mml:mtext>−</mml:mtext><mml:mi>J</mml:mi></mml:mrow></mml:math> ladder systems at low filling
Physical review. B./Physical review. B