{"id":11495,"date":"2018-07-27T08:30:18","date_gmt":"2018-07-27T06:30:18","guid":{"rendered":"http:\/\/fed.ino.it\/?p=11495"},"modified":"2018-07-27T08:30:18","modified_gmt":"2018-07-27T06:30:18","slug":"seminar-spin-resolved-microscopy-of-doped-hubbard-systems","status":"publish","type":"post","link":"https:\/\/www.ino.cnr.it\/?p=11495","title":{"rendered":"Seminar: Spin-resolved microscopy of doped Hubbard systems"},"content":{"rendered":"<p><strong>Luned\u00ec 30 Luglio 2018, ore 11:30<br \/>\nAula Querzoli, LENS &#8212; Via Nello Carrara 1, Sesto Fiorentino<\/strong><\/p>\n<p><strong>SPIN-RESOLVED MICROSCOPY OF DOPED HUBBARD SYSTEMS<\/strong><br \/>\n<strong>Dr. Timon Hilker, Cavendish Laboratory, University of Cambridge<\/strong><\/p>\n<p>The doping of an antiferromagnet can lead to complex physics related to high-temperature superconductivity. In one dimension, however, the relevant competition between spin and density sectors is largely absent due to the separation of the spin and density modes at low energy.<br \/>\nWith a quantum gas microscope for ultracold fermionic Li-6 in an optical lattice, we can study of such systems with a unique control over kinetic energy, interactions and doping. A challenge has been to reach the required temperature for spin order and to measure the antiferromagnetic correlations with cold atoms.<br \/>\nI will start by presenting our direct, single-spin resolved detection of antiferromagnetic correlations in spin-1\/2 Hubbard chains [1]. Upon doping the order decreases and their periodicity becomes incommensurate when measured with a standard two-point correlator [2]. With our full access to the spin and density distribution, we can directly measure three-point spin-hole-spin correlations and thus confirm that a hole in 1d only acts as a domain boundary of the spin-sector [3]. This is a direct consequence of the phenomenon of spin-charge separation and it allows to reveal the full correlations with non-local string operators [4].<br \/>\nExtending these techniques into the 2d regime, we started to study the effect of individual holes and doublons on an antiferromagnetic background. Without spin-charge separation, we find a significant reduction of the spin order around these mobile impurities, which is a first step towards the pairing of holes which might lead to d-wave superconductivity.<\/p>\n<p>[1] M. Boll et al., Science 353, 1257\u20131260 (2016).<br \/>\n[2] G. Salomon et al. ArXiv 1803.08892 (2018).<br \/>\n[3] T. A. Hilker et al., Science 357, 484-487 (2017).<br \/>\n[4] M. Den Nijs &amp; K. Rommelse, Phys. Rev. B 40, 4709\u20134734 (1989).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Luned\u00ec 30 Luglio 2018, ore 11:30 Aula Querzoli, LENS &#8212; Via Nello Carrara 1, Sesto Fiorentino SPIN-RESOLVED MICROSCOPY OF DOPED HUBBARD SYSTEMS Dr. Timon Hilker, Cavendish<span class=\"excerpt-hellip\"> [\u2026]<\/span><\/p>\n","protected":false},"author":424,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[36],"tags":[],"class_list":["post-11495","post","type-post","status-publish","format-standard","hentry","category-conferences-seminars"],"_links":{"self":[{"href":"https:\/\/www.ino.cnr.it\/index.php?rest_route=\/wp\/v2\/posts\/11495","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ino.cnr.it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ino.cnr.it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ino.cnr.it\/index.php?rest_route=\/wp\/v2\/users\/424"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ino.cnr.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=11495"}],"version-history":[{"count":2,"href":"https:\/\/www.ino.cnr.it\/index.php?rest_route=\/wp\/v2\/posts\/11495\/revisions"}],"predecessor-version":[{"id":11497,"href":"https:\/\/www.ino.cnr.it\/index.php?rest_route=\/wp\/v2\/posts\/11495\/revisions\/11497"}],"wp:attachment":[{"href":"https:\/\/www.ino.cnr.it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ino.cnr.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11495"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ino.cnr.it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}