BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Physics - ECPv6.3.4//NONSGML v1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH X-ORIGINAL-URL:https://uwm.edu/physics X-WR-CALDESC:Events for Physics REFRESH-INTERVAL;VALUE=DURATION:PT1H X-Robots-Tag:noindex X-PUBLISHED-TTL:PT1H BEGIN:VTIMEZONE TZID:America/Chicago BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 TZNAME:CDT DTSTART:20140309T080000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 TZNAME:CST DTSTART:20141102T070000 END:STANDARD BEGIN:DAYLIGHT TZOFFSETFROM:-0600 TZOFFSETTO:-0500 TZNAME:CDT DTSTART:20150308T080000 END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0500 TZOFFSETTO:-0600 TZNAME:CST DTSTART:20151101T070000 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID=America/Chicago:20151117T160000 DTEND;TZID=America/Chicago:20151117T170000 DTSTAMP:20240328T104839 CREATED:20151113T203227Z LAST-MODIFIED:20151113T204934Z UID:10372378-1447776000-1447779600@uwm.edu SUMMARY:Condensed Matter Physics Talk: Dr. Huiqui Yuan DESCRIPTION:Tuesday\, 17 November 2015\, 4:00 PM\, Physics 147. Coffee/tea/cookies will be available starting at 3:30 PM in the open area outside of the 3rd floor kitchenette area in the KIRC. \nInterplay of Superconductivity and Structural Transition/CDW State\nYuxuan Wang\, Professor\, Center for Correlated Matter & the Dept. of Physics\, Zhejiang University \nThe interplay of superconductivity and charge-density-wave (CDW) state remains a frontier topic in condensed matter physics. The newly discovered superconductors BaPt2As2 and EuFBiS2 showed evidence for the existence of superconductivity (SC) and a possible CDW state. \nTo study the possible interplays of SC and CDW in these compounds\, in this talk I will present our recent measurements of the electrical resistivity\, magnetic susceptibility and XRD diffraction under pressure\, which leads to rich temperature-pressure phase diagrams. URL:https://uwm.edu/physics/event/condensed-matter-physics-talk-dr-huiqui-yuan/ LOCATION:Physics 147\, 1900 E Kenwood Blvd\, Milwaukee\, 53211 CATEGORIES:Condensed Matter Physics Seminars GEO:43.0752062;-87.8859624 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Physics 147 1900 E Kenwood Blvd Milwaukee 53211;X-APPLE-RADIUS=500;X-TITLE=1900 E Kenwood Blvd:geo:-87.8859624,43.0752062 END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20150410T114500 DTEND;TZID=America/Chicago:20150410T130000 DTSTAMP:20240328T104839 CREATED:20150408T162556Z LAST-MODIFIED:20230207T161007Z UID:10366323-1428666300-1428670800@uwm.edu SUMMARY:Condensed Matter Physics Talk: Goutam Sheet DESCRIPTION:This Physics department Condensed Matter Physics Talk is scheduled for Friday\, April 10\, from 12:00-1:00 pm in Room 152. Refreshments are served from 11:45 am – 12:00 pm in the same room. \nDiscovery of an Unconventional Superconducting Phase on the 3-D Dirac Semi-metal Cd3As2\nDr. Goutam Sheet\, Assistant Professor of Physics & DST Ramanujan Fellow\, Indian Institute of Science Education and Research (ISER)\, Mohali\, India \nIn this talk I will present our recent work on the discovery of a novel superconducting phase at mesoscopic point-contacts between a metal and the 3-D semi-metal Cd3As2. Bulk Cd3As2 is not known to be a superconductor but when mesoscopic point-contacts are formed on Cd3As2 the point-contacts show superconductivity up to a critical temperature of 8 K. By performing Andreev reflection spectroscopy on such point-contacts we have measured an energy gap which is high (6 meV) and does not change much with temperature up to 13 K. This indicates an unconventional nature of the superconducting phase. We also see a pronounced zero-bias conductance peak which might be attributed to topological superconductivity. Furthermore\, from our experiments with ferromagnetic point-contacts on Cd3As2 we show the signature of a p-wave component in the order parameter of the new superconducting phase. URL:https://uwm.edu/physics/event/condensed-matter-physics-talk-goutam-sheet/ LOCATION:Physics 152\, 1900 E. Kenwood Blvd.\, Milwaukee\, 53211 CATEGORIES:Condensed Matter Physics Seminars GEO:43.0754208;-87.886051 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Physics 152 1900 E. Kenwood Blvd. Milwaukee 53211;X-APPLE-RADIUS=500;X-TITLE=1900 E. Kenwood Blvd.:geo:-87.886051,43.0754208 END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20150402T151500 DTEND;TZID=America/Chicago:20150402T163000 DTSTAMP:20240328T104839 CREATED:20150401T191452Z LAST-MODIFIED:20230207T160952Z UID:10366321-1427987700-1427992200@uwm.edu SUMMARY:Condensed Matter Physics Talk: Alexey Suslov DESCRIPTION:This Physics department Condensed Matter Physics Talk is scheduled for Thursday\, April 2\, from 3:30-4:30 pm in Room 137. Refreshments are served from 3:15-3:30 pm in the same room. \nAcoustic Studies of Two-Dimensional Structures with High Conductivity\nDr. Alexey V. Suslov\, National High Magnetic Field Lab\, Florida State University \nI will give a review of DC field facility at the National High Magnetic Field Laboratory and present a novel detector\, which I recently designed and built for ultrasonic experiments in High magnetic fields. I will describe our results obtained by the surface acoustic wave technique on two–‐dimensional (2D) structures with quantum Hall effect. We use this technique for studies of complex ac conductivity of 2D carriers. \nMeasurements on a p–‐GeSi/Ge/GeSi (p=6×10**11 cm–‐2) single quantum well were performed in tilted magnetic fields and revealed that the in-plane component of the magnetic field affects the g-factor and the cyclotron effective mass of the holes. \nOur studies of single 65nm quantum well AlGaAs/GaAs/AlGaAs structure (n=5×10**10 cm–‐2 and μ=8.5×10**6 cm2/Vs) were focused in the vicinity of the filling factor 1/5. In this region\, observed frequency dependence of the ac conductivity is of a resonance nature. Such a behavior of ac conductivity could be interpreted as manifestation of a pinning mode of a Wigner crystal. URL:https://uwm.edu/physics/event/condensed-matter-physics-talk-alexey-suslov/ LOCATION:Physics 137\, 1900 E. Kenwood Blvd.\, Milwaukee\, WI\, 53201\, United States CATEGORIES:Condensed Matter Physics Seminars GEO:43.0754208;-87.886051 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Physics 137 1900 E. Kenwood Blvd. Milwaukee WI 53201 United States;X-APPLE-RADIUS=500;X-TITLE=1900 E. Kenwood Blvd.:geo:-87.886051,43.0754208 END:VEVENT BEGIN:VEVENT DTSTART;TZID=America/Chicago:20141107T100000 DTEND;TZID=America/Chicago:20141107T110000 DTSTAMP:20240328T104839 CREATED:20141104T201954Z LAST-MODIFIED:20230207T155505Z UID:10405476-1415354400-1415358000@uwm.edu SUMMARY:Condensed Matter Physics Talk: Yuxuan Wang DESCRIPTION:Charge Orders and Symmetry Breaking in Underdoped Cuprates\nYuxuan Wang\, Physics PhD Student\, UW-Madison\nPhysics – Room 481 \nRecent experiments in STM\, neutron scattering\, and x-ray have provided strong evidence that incommensurate static charge orders with momenta (Q\,0) and (0\,Q) exist in underdoped cuprates. In the same doping range and at higher\ntemperatures\, there is evidence for broken rotational symmetry and broken time-reversal symmetry. In this talk\, I will present a theoretical study to explain the existence and doping dependence of the charge order. I will then discuss the interplay between different charge order parameters. Using a Ginzburg-Landau analysis\, I show that rotational symmetry and time-reversal symmetry are both broken in the ground state. \nMoreover\, going beyond a mean-field analysis\, I show that these discrete symmetries actually become broken at higher temperatures than the charge order onset temperature. I argue that such a state with broken discrete symmetries is a candidate for the enigmatic pseudogap in the cuprates and provides a “missing link” in understanding the cuprate physics. URL:https://uwm.edu/physics/event/condensed-matter-physics-talk/ LOCATION:Physics 481 – UW-Milwaukee\, 1900 E Kenwood Blvd\, Milwaukee\, WI\, 53211 GEO:43.0754208;-87.886051 X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Physics 481 – UW-Milwaukee 1900 E Kenwood Blvd Milwaukee WI 53211;X-APPLE-RADIUS=500;X-TITLE=1900 E Kenwood Blvd:geo:-87.886051,43.0754208 END:VEVENT END:VCALENDAR