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Structure, Rotational Dynamics, and Superfluidity of Small OCS-Doped He Clusters

2003; American Physical Society; Volume: 90; Issue: 14 Linguagem: Inglês

10.1103/physrevlett.90.143401

1092-0145

Saverio Moroni, A. Sarsa, S. Fantoni, K. E. Schmidt, Stefano Baroni,

Cold Atom Physics and Bose-Einstein Condensates

The structural and dynamical properties of carbonyl sulfide (OCS) molecules solvated in helium clusters are studied using reptation quantum Monte Carlo, for cluster sizes n=3-20 He atoms. Computer simulations allow us to establish a relation between the rotational spectrum of the solvated molecule and the structure of the He solvent, and of both with the onset of superfluidity. Our results agree with a recent spectroscopic study of this system and provide a more complex and detailed microscopic picture of this system than inferred from experiments.