Gordillo, M.C.Ceperley, D. M.2014-06-112014-06-111999-04Physical Review B - Condensed Matter and Materials Physics, 1999;59(13):8416-84191098-0121http://hdl.handle.net/10433/916The changes in the two-dimensional (2D) 4He phase diagram due to the introduction of impurities (Cs atoms) are estimated using path-integral Monte Carlo simulations. Our results indicate that when we increase the concentration of Cs atoms, the liquid-gas coexistence zone decreases in size and eventually disappears for ¿Cs~0.005Å-2, so that 2D 4He gases will be stable at low temperatures.application/pdfenAmerican Physical SocietyImpuritiesMonte Carlo simulationsjournal articleopen access