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SUMMARY:CM Seminar: High rank multipole order: feeling the strain\, Ian Fisher\, Stanford University
DESCRIPTION:Speaker: Ian Fisher\, Stanford University \nTime: 10:00-11:00am \nLocation: BRIM 311 \nTitle: High rank multipole order: feeling the strain \nAbstract: Interactions can lead to a wide variety of ordered states in materials. Phase transitions in which local atomic states develop spontaneous high rank multipole order provides a particularly rich arena for new insights. A key element in the study of such systems is the ability to couple to the associated order parameter. \nI will describe how one can couple to a variety of different multipolar states\, motivating new methodologies to measure a fundamental thermodynamic material property\, the multipole susceptibility. One can also identify effective transverse fields\, which\, when applied inside the ordered state\, induce quantum fluctuations and can drive a multipolar quantum phase transition. I will explain the very special roles that strain can play for each of the cases\, and will outline new experimental approaches in which the materials ‘feel the strain’ in different ways. \nEven while we manipulate the crystal lattice to tune electronic order\, hyperfine interactions are not always completely innocent. Along the way I will introduce the special case of an electro-nuclear quantum phase transition. 
URL:https://qmi.ubc.ca/event/cm-seminar-high-rank-multipole-order-feeling-the-strain-ian-fisher-stanford-university/
LOCATION:BRIM 311\, 2355 East Mall\, Vancouver\, British Columbia\, V6T 1Z4\, Canada
CATEGORIES:CM Seminar
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