{"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/1907.06253"}],"publisher":"American Physical Society","acknowledgement":"We thank S. Chiacchiera, G. Delfino, N. Dupuis, T. Enss, M. Fabrizio and G. Gori for many stimulating discussions.\r\nG.B. acknowledges support from the Austrian Science Fund (FWF), under project No. M2461-N27. N.D. acknowledges\r\nsupport from Deutsche Forschungsgemeinschaft (DFG) under Germany’s Excellence Strategy EXC-2181/1 - 390900948 (the Heidelberg STRUCTURES Excellence Cluster) and from the DFG Collaborative Research Centre “SFB 1225 ISOQUANT”. Support from the CNR/MTA Italy-Hungary 2019-2021 Joint Project “Strongly interacting systems in confined geometries” is gratefully acknowledged.","quality_controlled":"1","month":"09","language":[{"iso":"eng"}],"publication_status":"published","title":"Berezinskii-Kosterlitz-Thouless paired phase in coupled XY models","article_number":"100601","date_created":"2019-10-14T06:31:13Z","related_material":{"link":[{"description":"News auf IST Website","relation":"press_release","url":"https://ist.ac.at/en/news/new-form-of-magnetism-found/"}]},"year":"2019","citation":{"ieee":"G. Bighin, N. Defenu, I. Nándori, L. Salasnich, and A. Trombettoni, “Berezinskii-Kosterlitz-Thouless paired phase in coupled XY models,” <i>Physical Review Letters</i>, vol. 123, no. 10. American Physical Society, 2019.","apa":"Bighin, G., Defenu, N., Nándori, I., Salasnich, L., &#38; Trombettoni, A. (2019). Berezinskii-Kosterlitz-Thouless paired phase in coupled XY models. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/physrevlett.123.100601\">https://doi.org/10.1103/physrevlett.123.100601</a>","ista":"Bighin G, Defenu N, Nándori I, Salasnich L, Trombettoni A. 2019. Berezinskii-Kosterlitz-Thouless paired phase in coupled XY models. Physical Review Letters. 123(10), 100601.","chicago":"Bighin, Giacomo, Nicolò Defenu, István Nándori, Luca Salasnich, and Andrea Trombettoni. “Berezinskii-Kosterlitz-Thouless Paired Phase in Coupled XY Models.” <i>Physical Review Letters</i>. American Physical Society, 2019. <a href=\"https://doi.org/10.1103/physrevlett.123.100601\">https://doi.org/10.1103/physrevlett.123.100601</a>.","short":"G. Bighin, N. Defenu, I. Nándori, L. Salasnich, A. Trombettoni, Physical Review Letters 123 (2019).","ama":"Bighin G, Defenu N, Nándori I, Salasnich L, Trombettoni A. Berezinskii-Kosterlitz-Thouless paired phase in coupled XY models. <i>Physical Review Letters</i>. 2019;123(10). doi:<a href=\"https://doi.org/10.1103/physrevlett.123.100601\">10.1103/physrevlett.123.100601</a>","mla":"Bighin, Giacomo, et al. “Berezinskii-Kosterlitz-Thouless Paired Phase in Coupled XY Models.” <i>Physical Review Letters</i>, vol. 123, no. 10, 100601, American Physical Society, 2019, doi:<a href=\"https://doi.org/10.1103/physrevlett.123.100601\">10.1103/physrevlett.123.100601</a>."},"project":[{"call_identifier":"FWF","_id":"26986C82-B435-11E9-9278-68D0E5697425","name":"A path-integral approach to composite impurities","grant_number":"M02641"}],"issue":"10","oa_version":"Preprint","author":[{"id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8823-9777","last_name":"Bighin","first_name":"Giacomo","full_name":"Bighin, Giacomo"},{"last_name":"Defenu","first_name":"Nicolò","full_name":"Defenu, Nicolò"},{"first_name":"István","full_name":"Nándori, István","last_name":"Nándori"},{"first_name":"Luca","full_name":"Salasnich, Luca","last_name":"Salasnich"},{"last_name":"Trombettoni","full_name":"Trombettoni, Andrea","first_name":"Andrea"}],"intvolume":"       123","oa":1,"article_processing_charge":"No","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","department":[{"_id":"MiLe"}],"doi":"10.1103/physrevlett.123.100601","date_updated":"2023-08-30T06:57:53Z","abstract":[{"text":"We study the effect of a linear tunneling coupling between two-dimensional systems, each separately\r\nexhibiting the topological Berezinskii-Kosterlitz-Thouless (BKT) transition. In the uncoupled limit, there\r\nare two phases: one where the one-body correlation functions are algebraically decaying and the other with\r\nexponential decay. When the linear coupling is turned on, a third BKT-paired phase emerges, in which one-body correlations are exponentially decaying, while two-body correlation functions exhibit power-law\r\ndecay. We perform numerical simulations in the paradigmatic case of two coupled XY models at finite\r\ntemperature, finding evidences that for any finite value of the interlayer coupling, the BKT-paired phase is\r\npresent. We provide a picture of the phase diagram using a renormalization group approach.","lang":"eng"}],"date_published":"2019-09-06T00:00:00Z","publication_identifier":{"eissn":["1079-7114"],"issn":["0031-9007"]},"external_id":{"isi":["000483587200004"],"arxiv":["1907.06253"]},"publication":"Physical Review Letters","_id":"6940","article_type":"original","status":"public","volume":123,"isi":1,"day":"06","scopus_import":"1","type":"journal_article"}