@article{bc57ef4ba81841978724bbf0f6dfca41,
title = "Observation of a roton collective mode in a two-dimensional Fermi liquid",
author = "Henri Godfrin and Mathias Meschke and Lauter, \{H. J.\} and A. Sultan and Helga B{\"o}hm and Eckhard Krotscheck and Martin Panholzer",
year = "2012",
month = mar,
day = "29",
doi = "10.1038/nature10919",
language = "English",
volume = "483",
pages = "576--579",
journal = "Nature",
issn = "1476-4687",
publisher = "Macmillian Publishers Limited",
number = "7391",
}