PIRSA:19090113

Bosonization and the shear sound of metals

Sodemann, I. (2019). Bosonization and the shear sound of metals. Perimeter Institute. https://pirsa.org/19090113

Sodemann, Inti. Bosonization and the shear sound of metals. Perimeter Institute, Sep. 24, 2019, https://pirsa.org/19090113 

          @misc{ pirsa_PIRSA:19090113,
            doi = {10.48660/19090113},
            url = {https://pirsa.org/19090113},
            author = {Sodemann, Inti},
            keywords = {Condensed Matter},
            language = {en},
            title = {Bosonization and the shear sound of metals},
            publisher = {Perimeter Institute},
            year = {2019},
            month = {sep},
            note = {PIRSA:19090113 see, \url{https://pirsa.org}}
          }

Inti Sodemann

Max Planck Institute for the Physics of Complex Systems

Talk number
PIRSA:19090113
Collection
Talk Type
Subject
Abstract

We will review the bosonization approach to Fermi liquids in dimensions above one. We will use this to study a sharp change in the neutral excitation spectrum of fermi liquids that occurs beyond a critical interaction strength whereby an unconventional collective mode exits the particle-hole continuum. This mode is a collective shear wave that features purely transverse current oscillations, in analogy to the transverse sound of crystals. Because it is hard to “see" due to its transversal nature, the shear sound might be already “hiding`' in several metals. We will describe two strategies to “see” the shear sound: the appearance of sharp conductivity dips in ultra clean narrow channels and its coupling to charge-fluctuations under weak magnetic fields.