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SUMMARY:Feeling the strain: quadrupoles\, octupoles and beyond - Ian Fishe
 r (Stanford)
DTSTART:20241205T150000Z
DTEND:20241205T160000Z
UID:TALK224806@talks.cam.ac.uk
CONTACT:Lucas Sá
DESCRIPTION:Interactions can lead to a wide variety of ordered states in q
 uantum materials\, spanning from the obvious to incredibly subtle. For thi
 s talk\, I will focus on the case of high rank multipole order of local at
 omic states\, which are very much on the subtle end of the spectrum. I wil
 l particularly emphasize the importance of coupling to the associated orde
 r parameters as a means to measure the multipolar susceptibilities\, and a
 lso\, inside the ordered state\, to induce quantum fluctuations via applic
 ation of transverse effective fields. I will explain the very special role
 s that strain can play for each of the cases (quadrupolar\, octupolar\, he
 xadecapolar)\, and will outline several new experimental approaches in whi
 ch the materials 'feel the strain' in very different ways. Along the way I
  will introduce a special case of an electro-nuclear quantum phase transit
 ion. The confluence of new measurement techniques and new materials also l
 eads to possibilities for new applications\; I will briefly outline one su
 ch application\, based on a giant elastocaloric effect. Multipolar order\,
  it would seem\, is not only interesting from a fundamental perspective\, 
 but can also be useful.
LOCATION:Venue to be confirmed
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