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SUMMARY:Destruction of quasiparticles near the Mott metal-insulator transi
 tion
DTSTART;VALUE=DATE-TIME:20101008T090000Z
DTEND;VALUE=DATE-TIME:20101008T100000Z
DTSTAMP;VALUE=DATE-TIME:20261010T032846Z
UID:indico-event-1@indico.ipb.ac.rs
DESCRIPTION:The concept of quasiparticles is fundamental to quantum many-b
 ody physics and to our understanding of the electronic properties of eleme
 ntal metals. However\, there is considerable debate about  the stability a
 nd quantum numbers (and even the existence) of quasiparticles in a wide ra
 nge of strongly correlated electron materials [1]. Prominent examples incl
 ude transition metal oxides\, high-Tc cuprate superconductors\, and heavy 
 fermion compounds.\n\nThe frequency dependent optical conductivity has pro
 ven to be a powerful experimental probe in addressing these issues.\nI wil
 l describe a recent combined theoretical and experimental study of the low
  energy electrodynamics of charge carriers close to the Mott metal-insulat
 or transition in a quasi two-dimensional organic charge-transfer salt [2].
 \nThe frequency dependence of the conductivity deviates significantly from
  the Drude model behavior\, characteristic of\nelemental metals. There is 
 a strong redistribution of spectral weight as the Mott transition is appro
 ached and with temperature. The quasiparticles only exist at relatively lo
 w energies and their effective mass increases  considerably near the insul
 ating phase. A dynamical mean-field-theory treatment of the relevant Hubba
 rd model gives a good quantitative description of the experimental data [2
 ].\n\n[1] R. H. McKenzie\, Nature Physics 3\, 756 (2007).\n[2] J. Merino\,
  M. Dumm\, N. Drichko\, M. Dressel\, and R. H. McKenzie\, Phys. Rev. Lett.
  100\, 086404:1-4 (2008).\n\nhttps://events.saifa.rs/event/1/
LOCATION:Institute of Physics Belgrade Library
URL:https://events.saifa.rs/event/1/
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