{"id":120,"date":"2021-10-07T16:06:17","date_gmt":"2021-10-07T14:06:17","guid":{"rendered":"http:\/\/quantummattertheory.fr\/?page_id=120"},"modified":"2026-05-05T21:31:55","modified_gmt":"2026-05-05T19:31:55","slug":"schedule","status":"publish","type":"page","link":"https:\/\/quantummattertheory.fr\/?page_id=120","title":{"rendered":"Schedule"},"content":{"rendered":"\n<p><span class=\"has-inline-color has-black-color\">Find the upcoming seminars below.<\/span><\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-background has-black-background-color has-black-color is-style-wide\"\/>\n\n\n\n<p>TQM seminar #46 : May 21, 2026, 2pm (LPTMC seminar room, towers 13-12, 5th floor, room 523)<\/p>\n\n\n\n<p><strong><strong>Beno\u00eet Fauqu\u00e9<\/strong><\/strong> (Coll\u00e8ge de France, Paris)<\/p>\n\n\n\n<p><em>Superconducting dome and incipient modulate phase in SrTiO3<\/em><\/p>\n\n\n\n<p>SrTiO\u2083 is a \u201cquantum paraelectric\u201d in which dipolar fluctuations grow upon cooling, yet long-range ferroelectric order never develops. In this seminar, I will discuss the evolution of these dipolar fluctuations, as measured by inelastic neutron scattering, as the system is tuned toward superconducting and ferroelectric phases.<\/p>\n\n\n\n<p>First, I will show that the superconducting dome of SrTiO\u2083 is driven by the competition between the increase in the density of states and the inevitable collapse of the quantum paraelectric phase under electron doping. Second, I will demonstrate that these dipolar fluctuations couple to a transverse acoustic mode (elastic constant c\u2084\u2084), with this coupling being most pronounced at small q-vectors. I will further show that SrTiO\u2083 lies near a modulated phase, as evidenced by significant softening of its transverse acoustic branch.<\/p>\n\n\n\n<p>Both the amplitude of the coupling and the modulation vector are strongly influenced by the enhancement of the ferroelectric and antiferrodistortive (AFD) phase transitions. These findings suggest that SrTiO\u2083 is not only an incipient ferroelectric but also an incipient modulated material, with the modulated phase cooperating, rather than competing, with ferroelectricity and the AFD transition.<\/p>\n\n\n\n<p>If time permits, I will also present the electric-field dependence of the thermal conductivity\u2014another probe of acoustic phonons\u2014in SrTiO\u2083. This will provide further evidence of TO\u2013TA hybridization in SrTiO\u2083.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-background has-black-background-color has-black-color is-style-wide\"\/>\n\n\n\n<p>TQM seminar #47 : June 18, 2026, 2pm (LPTMC seminar room, towers 13-12, 5th floor, room 523)<\/p>\n\n\n\n<p><strong><strong><strong>Luca Giacomelli<\/strong><\/strong> <\/strong>(MPQ, UPC)<\/p>\n\n\n\n<p><em>TBA<\/em><\/p>\n\n\n\n<p>TBA<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-background has-black-background-color has-black-color is-style-wide\"\/>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Find the upcoming seminars below. TQM seminar #46 : May 21, 2026, 2pm (LPTMC seminar room, towers 13-12, 5th floor, room 523) Beno\u00eet Fauqu\u00e9 (Coll\u00e8ge de France, Paris) Superconducting dome and incipient modulate phase in SrTiO3 SrTiO\u2083 is a \u201cquantum &hellip; <a href=\"https:\/\/quantummattertheory.fr\/?page_id=120\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/quantummattertheory.fr\/index.php?rest_route=\/wp\/v2\/pages\/120"}],"collection":[{"href":"https:\/\/quantummattertheory.fr\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/quantummattertheory.fr\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/quantummattertheory.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/quantummattertheory.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=120"}],"version-history":[{"count":284,"href":"https:\/\/quantummattertheory.fr\/index.php?rest_route=\/wp\/v2\/pages\/120\/revisions"}],"predecessor-version":[{"id":646,"href":"https:\/\/quantummattertheory.fr\/index.php?rest_route=\/wp\/v2\/pages\/120\/revisions\/646"}],"wp:attachment":[{"href":"https:\/\/quantummattertheory.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=120"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}