{"abstract":[{"text":"The formation of vortices is usually considered to be the main mechanism of angular momentum disposal in superfluids. Recently, it was predicted that a superfluid can acquire angular momentum via an alternative, microscopic route -- namely, through interaction with rotating impurities, forming so-called `angulon quasiparticles' [Phys. Rev. Lett. 114, 203001 (2015)]. The angulon instabilities correspond to transfer of a small number of angular momentum quanta from the impurity to the superfluid, as opposed to vortex instabilities, where angular momentum is quantized in units of ℏ  per atom. Furthermore, since conventional impurities (such as molecules) represent three-dimensional (3D) rotors, the angular momentum transferred is intrinsically 3D as well, as opposed to a merely planar rotation which is inherent to vortices. Herein we show that the angulon theory can explain the anomalous broadening of the spectroscopic lines observed for CH 3   and NH 3   molecules in superfluid helium nanodroplets, thereby providing a fingerprint of the emerging angulon instabilities in experiment.","lang":"eng"}],"year":"2017","issue":"3","publisher":"American Physical Society","status":"public","ec_funded":1,"department":[{"_id":"MiLe"}],"oa_version":"Submitted Version","type":"journal_article","citation":{"ieee":"I. Cherepanov and M. Lemeshko, “Fingerprints of angulon instabilities in the spectra of matrix-isolated molecules,” <i>Physical Review Materials</i>, vol. 1, no. 3. American Physical Society, 2017.","ama":"Cherepanov I, Lemeshko M. Fingerprints of angulon instabilities in the spectra of matrix-isolated molecules. <i>Physical Review Materials</i>. 2017;1(3). doi:<a href=\"https://doi.org/10.1103/PhysRevMaterials.1.035602\">10.1103/PhysRevMaterials.1.035602</a>","ista":"Cherepanov I, Lemeshko M. 2017. Fingerprints of angulon instabilities in the spectra of matrix-isolated molecules. Physical Review Materials. 1(3).","short":"I. Cherepanov, M. Lemeshko, Physical Review Materials 1 (2017).","mla":"Cherepanov, Igor, and Mikhail Lemeshko. “Fingerprints of Angulon Instabilities in the Spectra of Matrix-Isolated Molecules.” <i>Physical Review Materials</i>, vol. 1, no. 3, American Physical Society, 2017, doi:<a href=\"https://doi.org/10.1103/PhysRevMaterials.1.035602\">10.1103/PhysRevMaterials.1.035602</a>.","chicago":"Cherepanov, Igor, and Mikhail Lemeshko. “Fingerprints of Angulon Instabilities in the Spectra of Matrix-Isolated Molecules.” <i>Physical Review Materials</i>. American Physical Society, 2017. <a href=\"https://doi.org/10.1103/PhysRevMaterials.1.035602\">https://doi.org/10.1103/PhysRevMaterials.1.035602</a>.","apa":"Cherepanov, I., &#38; Lemeshko, M. (2017). Fingerprints of angulon instabilities in the spectra of matrix-isolated molecules. <i>Physical Review Materials</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevMaterials.1.035602\">https://doi.org/10.1103/PhysRevMaterials.1.035602</a>"},"date_created":"2018-12-11T11:49:35Z","scopus_import":"1","article_processing_charge":"No","isi":1,"date_updated":"2023-09-22T09:53:42Z","month":"08","title":"Fingerprints of angulon instabilities in the spectra of matrix-isolated molecules","main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1705.09220"}],"oa":1,"language":[{"iso":"eng"}],"publist_id":"6405","quality_controlled":"1","intvolume":"         1","user_id":"c635000d-4b10-11ee-a964-aac5a93f6ac1","day":"08","publication_status":"published","publication":"Physical Review Materials","date_published":"2017-08-08T00:00:00Z","project":[{"_id":"26031614-B435-11E9-9278-68D0E5697425","name":"Quantum rotations in the presence of a many-body environment","grant_number":"P29902","call_identifier":"FWF"},{"name":"International IST Doctoral Program","_id":"2564DBCA-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","grant_number":"665385"}],"external_id":{"isi":["000416564000004"]},"_id":"994","volume":1,"author":[{"id":"339C7E5A-F248-11E8-B48F-1D18A9856A87","full_name":"Cherepanov, Igor","last_name":"Cherepanov","first_name":"Igor"},{"first_name":"Mikhail","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-6990-7802","last_name":"Lemeshko","full_name":"Lemeshko, Mikhail"}],"doi":"10.1103/PhysRevMaterials.1.035602"}