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arXiv · 1512.03906

Low-density phases of $^3$He monolayers adsorbed on graphite

Michele Ruggeri·Ettore Vitali·Davide Emilio Galli·Massimo Boninsegni·Saverio Moroni
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Abstract

Quantum Monte Carlo simulations at zero temperature of a $^3$He monolayer adsorbed on graphite, either clean or preplated with $^4$He, unexpectedly point to a gas-liquid phase transition at a very low areal density of the order of 0.01Å$^{-2}$. This result stems from an essentially unbiased calculation of the ground state energy for an infinite, defect-free substrate which interacts with He atoms via a realistic potential, whereas the interaction between two He atoms includes two- and three-body terms. The sensitivity of the gas-liquid coexistence region on the model Hamiltonian employed is discussed.

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Michele Ruggeri, Ettore Vitali, Davide Emilio Galli, Massimo Boninsegni, Saverio Moroni. 2016-02-10. Low-density phases of $^3$He monolayers adsorbed on graphite. https://doi.org/10.1103/physrevb.93.104102

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