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SUMMARY:Quantum Magnonics in V[TCNE]2
LOCATION:Lory Student Center 372-374
TZID:America/Denver
DTSTART:20191201T000000
UID:2026-05-16-08-59-51@natsci.colostate.edu
DTSTAMP:20260516T085951
Description:About the Seminar\n\nThe study of quantum coherent magnonic int
 eractions relies implicitly on the ability to excite and exploit long live
 d spin wave excitations in a magnetic material. That requirement has led t
 o the nearly universal reliance on yittrium iron garnet (YIG)\, which for 
 half a century has reigned as the unchallenged leader in high-Q\, low loss
  magnetic resonance\, and more recently in the exploration of coherent qua
 ntum coupling between magnonic and spin [1] or superconducting [2] degrees
  of freedom. Surprisingly\, the organic-based ferrimagnet vanadium tetracy
 anoethylene (V[TCNE]2) has recently emerged as a compelling alternative to
  YIG. In contrast to other organic-based materials V[TCNE]2 exhibits a Cur
 ie temperature of over 600 K with robust room temperature hysteresis with 
 sharp switching to full saturation. Further\, since V[TCNE]2 is grown via 
 chemical vapor deposition (CVD) at 50 C it can be conformally deposited as
  a thin film on a wide variety of substrates with Q rivaling the very best
  thin-film YIG devices [3]\, which must be grown epitaxially on GGG substr
 ates at temperatures over 800 C. Work in preparation shows that this Q can
  be as high as 8\,000 (linewidth of 0.50 Oe at 9.86 GHz). Here\, we will p
 resent evidence of coherent magnonic excitations in V[TCNE]2 thin films an
 d nanostructures\, pointing to magnon-magnon coupling that can be tuned in
 to the strong coupling regime and spin-magnon coupling that allows for the
  transduction of quantum information from 0D to extended quantum states. T
 hese results demonstrate the remarkable potential for these structures to 
 play a major role in the emerging field of quantum magnonics\, with applic
 ations ranging from the creation of highly coherent magnon crystals to qua
 ntum sensing and information. 4:00 pm
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