{"related_material":{"link":[{"url":"https://ist.ac.at/en/news/new-form-of-magnetism-found/","description":"News auf IST Website","relation":"press_release"}]},"status":"public","title":"Berezinskii-Kosterlitz-Thouless paired phase in coupled XY models","quality_controlled":"1","scopus_import":"1","publisher":"American Physical Society","date_created":"2019-10-14T06:31:13Z","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","oa":1,"oa_version":"Preprint","abstract":[{"lang":"eng","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."}],"main_file_link":[{"url":"https://arxiv.org/abs/1907.06253","open_access":"1"}],"department":[{"_id":"MiLe"}],"issue":"10","publication_status":"published","date_published":"2019-09-06T00:00:00Z","date_updated":"2024-08-07T07:16:52Z","month":"09","article_processing_charge":"No","day":"06","type":"journal_article","project":[{"call_identifier":"FWF","grant_number":"M02641","_id":"26986C82-B435-11E9-9278-68D0E5697425","name":"A path-integral approach to composite impurities"}],"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.","isi":1,"year":"2019","volume":123,"intvolume":"       123","language":[{"iso":"eng"}],"_id":"6940","article_number":"100601","article_type":"original","citation":{"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>","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>.","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>","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.","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>."},"publication_identifier":{"issn":["0031-9007"],"eissn":["1079-7114"]},"external_id":{"arxiv":["1907.06253"],"isi":["000483587200004"]},"doi":"10.1103/physrevlett.123.100601","author":[{"first_name":"Giacomo","last_name":"Bighin","full_name":"Bighin, Giacomo","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8823-9777"},{"full_name":"Defenu, Nicolò","last_name":"Defenu","first_name":"Nicolò"},{"full_name":"Nándori, István","first_name":"István","last_name":"Nándori"},{"full_name":"Salasnich, Luca","last_name":"Salasnich","first_name":"Luca"},{"first_name":"Andrea","last_name":"Trombettoni","full_name":"Trombettoni, Andrea"}],"publication":"Physical Review Letters"}