BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Denver BEGIN:DAYLIGHT DTSTART:20250309T030000 TZOFFSETFROM:-0700 TZOFFSETTO:-0600 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:MDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20241103T010000 TZOFFSETFROM:-0600 TZOFFSETTO:-0700 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:MST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20250228T002244Z UID:91C68414-8FF0-4D32-8B0C-25855C72A459 DTSTART;TZID=America/Denver:20250225T100000 DTEND;TZID=America/Denver:20250225T120000 DESCRIPTION:IEEE Magnetics Society Seminar\nLocation: NIST\, Boulder\, 325 Broadway\, Building 2\, Room 2-0113\nDate and Time: Tuesday\, February 25t h\, 2025\nRefreshments provided at 10:00 AM\nSeminar starts at 10:30 AM\n\ nEngineering quantum Hall magnets in topological moiré systems\n\nProf. D acen Waters Department of Physics and Astronomy\, University of Denver\n\n Strongly correlated and topological phases in condensed matter systems are at the cutting edge of fundamental physics studies\, as well as being pro mising candidates for the next generation of technological capabilities li ke quantum computing. In recent years\, a remarkable amount of progress ha s been made in creating and controlling such phases by introducing a small twist angle or lattice mismatch between two dimensional (2D) materials. T hese systems\, called moiré systems\, have facilitated the surprising dis covery of strongly correlated phases where one might not expect them (e.g. superconductivity in “magic-angle” twisted bilayer graphene) or long- sought new physics (e.g. the fractional quantum anomalous Hall effect (FQA HE) in twisted MoTe2). However\, much of the work in this rapidly developi ng field have focused on the case where the constituent 2D materials of th e moiré system are monolayers\, or at most bilayers. I will show that thi s restriction to one or two atomic layers is unnecessarily limiting. Surpr ising new phenomenology can be realized in graphitic moiré systems\, wher e at least one component is three-layers or more. Most notably\, we find t hat a new type of “moiré enabled” electron crystallization can occur that spontaneously breaks the moiré translational symmetry and has dissip ationless edge modes\, analogous to a topological version of a Wigner crys tal. Our results suggest that these topological electron crystals 1) are a t least somewhat common across multilayer graphene moiré systems\, 2) can have uniquely tunable magnetization states\, and 3) closely compete with the newly discovered FQAHE. Understanding this competition\, as well as th e novel phenomenology of the topological electron crystal phase\, will be of fundamental interest in future studies of strongly correlated topologic al systems.\n\nProf. Dacen Waters earned his bachelor’s degrees in physi cs and mechanical engineering from Arkansas Tech University. He then went on to get his PhD in physics at Carnegie Mellon University\, under the sup ervision of Profs. Randy Feenstra and Ben Hunt. His PhD work focused on tw o-dimensional material and moiré systems using scanning tunneling microsc opy. He then went on to be a postdoctoral fellow in Prof. Matthew Yankowit z’s lab at the University of Washington\, where he was awarded a postdoc toral fellowship through the Oak Ridge Institute for Science and Education . At the University of Washington\, he utilized transport studies to inves tigate novel correlated and topological states in graphitic moiré systems . In Fall of 2024\, he began as an Assistant Professor in the University o f Denver Department of Physics and Astronomy.\nJoin ZoomGov Meeting https: //nist.zoomgov.com/j/1619827375?pwd=4E5AjJBOt04WVK0pNPwpYCI4v3B8mj.1 Meeti ng ID: 161 982 7375 Passcode: 068475\n\nSpeaker(s): \, Dacen Waters\n\nRoo m: 2-0113\, Bldg: Building 2\, 325 Broadway\, Boulder\, Colorado\, United States\, Virtual: https://events.vtools.ieee.org/m/469265 LOCATION:Room: 2-0113\, Bldg: Building 2\, 325 Broadway\, Boulder\, Colorad o\, United States\, Virtual: https://events.vtools.ieee.org/m/469265 ORGANIZER:stephen.russek@nist.gov SEQUENCE:9 SUMMARY:Engineering quantum Hall magnets in topological moiré systems URL;VALUE=URI:https://events.vtools.ieee.org/m/469265 X-ALT-DESC:Description: <br /><p>IEEE Magnetics Society Seminar<br>Location : NIST\, Boulder\, 325 Broadway\,&nbsp\; Building 2\, Room 2-0113<br>Date and Time: Tuesday\, February 25th\, 2025<br>Refreshments provided at 10:00 AM<br>Seminar starts at 10:30 AM</p>\n<p><br><strong>Engineering quantum Hall magnets in topological moir&eacute\; systems</strong></p>\n<p>Prof. D acen Waters Department of Physics and Astronomy\, University of Denver</p> \n<p><br>Strongly correlated and topological phases in condensed matter sy stems are at the cutting edge of fundamental physics studies\, as well as being promising candidates for the next generation of technological capabi lities like quantum computing. In recent years\, a remarkable amount of pr ogress has been made in creating and controlling such phases by introducin g a small twist angle or lattice mismatch between two dimensional (2D) mat erials. These systems\, called moir&eacute\; systems\, have facilitated th e surprising discovery of strongly correlated phases where one might not e xpect them (e.g. superconductivity in &ldquo\;magic-angle&rdquo\; twisted bilayer graphene) or long-sought new physics (e.g. the fractional quantum anomalous Hall effect (FQAHE) in twisted MoTe2). However\, much of the wor k in this rapidly developing field have focused on the case where the cons tituent 2D materials of the moir&eacute\; system are monolayers\, or at mo st bilayers. I will show that this restriction to one or two atomic layers is unnecessarily limiting. Surprising new phenomenology can be realized i n graphitic moir&eacute\; systems\, where at least one component is three- layers or more. Most notably\, we find that a new type of &ldquo\;moir&eac ute\; enabled&rdquo\; electron crystallization can occur that spontaneousl y breaks the moir&eacute\; translational symmetry and has dissipationless edge modes\, analogous to a topological version of a Wigner crystal. Our r esults suggest that these topological electron crystals 1) are at least so mewhat common across multilayer graphene moir&eacute\; systems\, 2) can ha ve uniquely tunable magnetization states\, and 3) closely compete with the newly discovered FQAHE. Understanding this competition\, as well as the n ovel phenomenology of the topological electron crystal phase\, will be of fundamental interest in future studies of strongly correlated topological systems.</p>\n<p><br><strong>Prof. Dacen Waters</strong> earned his bachel or&rsquo\;s degrees in physics and mechanical engineering from Arkansas Te ch University. He then went on to get his PhD in physics at Carnegie Mello n University\, under the supervision of Profs. Randy Feenstra and Ben Hunt . His PhD work focused on two-dimensional material and moir&eacute\; syste ms using scanning tunneling microscopy. He then went on to be a postdoctor al fellow in Prof. Matthew Yankowitz&rsquo\;s lab at the University of Was hington\, where he was awarded a postdoctoral fellowship through the Oak R idge Institute for Science and Education. At the University of Washington\ , he utilized transport studies to investigate novel correlated and topolo gical states in graphitic moir&eacute\; systems. In Fall of 2024\, he bega n as an Assistant Professor in the University of Denver Department of Phys ics and Astronomy.<br>Join ZoomGov Meeting https://nist.zoomgov.com/j/1619 827375?pwd=4E5AjJBOt04WVK0pNPwpYCI4v3B8mj.1 Meeting ID: 161 982 7375 Passc ode: 068475</p> END:VEVENT END:VCALENDAR