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DTSTART:20190331T030000
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DTSTART:20181028T020000
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DTSTAMP:20260404T020000Z
UID:59d4bf21eac1c319104209@ist.ac.at
DTSTART:20181120T110000
DTEND:20181120T123000
DESCRIPTION:Speaker: Edgardo Solano Carrillo\nhosted by Misha Lemeshko\nAbs
 tract: The first detection of the phonon spin [1\, 2] in a magnetic insula
 tor and observation ofits chiral behavior [3] in a semiconductor\, have be
 en made early this year. This bringsthe natural question: are chiral\, spi
 nful phonons naturally excited in pure metals and\, ifso\, how would they 
 contribute to their electrical resistivities? In this talk\, I presentevid
 ence that this should be the case for the 3d ferromagnetic metals\, and co
 nnect itsconsequence to a long-standing puzzle (dating back to the 50s) re
 garding the quantummechanicalexplanation of an anomaly observed in the ele
 ctrical resistivity of iron\,cobalt and nickel around liquid-helium temper
 atures. I propose a theory [4] which\, withno fitting parameters\, is able
  to explain the anomaly\, with the extra gift of predicting theobserved sp
 in-lattice relaxation times of these metals at room temperature. It rests 
 on atype of correlated motion of the conduction electrons that I conjectur
 e which\, byinteraction with the angular-momentum reservoir provided by ch
 iral phonons\, allowsthem to find a channel for spin-flip transitions. Ide
 as relating this problem with theangulon theory including possible researc
 h avenues will be presented.References:[1] J. Holanda\, et al.\, Detecting
  the phonon spin in magnon-phonon conversionexperiments\, Nature Physics\,
  https://doi.org/10.1038/s41567-018-0079-y (2018).[2] M. B. Jungfleisch an
 d A. Hoffmann\, A new twist on phonons\, Nature Physics\,https://doi.org/1
 0.1038/s41567-018-0104-1 (2018).[3] H. Zhu et al.\, Observation of Chiral 
 Phonons\, Science 359\, 579 (2018).[4] E. Solano-Carrillo\, Chiral phonons
  and electrical resistivity of ferromagnetic metalsat low temperatures\, t
 o appear in Phys. Status Solidi B\, (2018).
LOCATION:Big Seminar room Ground floor / Office Bldg West (I21.EG.101)\, IS
 TA
ORGANIZER:jdeanton@ist.ac.at
SUMMARY:Edgardo Solano Carrillo: Electron-Chiral-Phonon Interaction in 3d F
 erromagnetic Metals
URL:https://talks-calendar.ista.ac.at/events/1559
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