TY - JOUR
T1 - Generic Optical Excitations of Correlated Systems
T2 - π -tons
AU - Kauch, A.
AU - Pudleiner, P.
AU - Astleithner, K.
AU - Thunström, P.
AU - Ribic, T.
AU - Held, K.
PY - 2020/1/31
Y1 - 2020/1/31
N2 - The interaction of light with solids gives rise to new bosonic quasiparticles, with the exciton being - undoubtedly - the most famous of these polaritons. While excitons are the generic polaritons of semiconductors, we show that for strongly correlated systems another polariton is prevalent - originating from the dominant antiferromagnetic or charge density wave fluctuations in these systems. As these are usually associated with a wave vector (π,π,...) or close to it, we propose to call the derived polaritons π-tons. These π-tons yield the leading vertex correction to the optical conductivity in all correlated models studied: the Hubbard, the extended Hubbard model, the Falicov-Kimball, and the Pariser-Parr-Pople model, both in the insulating and in the metallic phase.
AB - The interaction of light with solids gives rise to new bosonic quasiparticles, with the exciton being - undoubtedly - the most famous of these polaritons. While excitons are the generic polaritons of semiconductors, we show that for strongly correlated systems another polariton is prevalent - originating from the dominant antiferromagnetic or charge density wave fluctuations in these systems. As these are usually associated with a wave vector (π,π,...) or close to it, we propose to call the derived polaritons π-tons. These π-tons yield the leading vertex correction to the optical conductivity in all correlated models studied: the Hubbard, the extended Hubbard model, the Falicov-Kimball, and the Pariser-Parr-Pople model, both in the insulating and in the metallic phase.
UR - http://www.scopus.com/inward/record.url?scp=85079520978&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.124.047401
DO - 10.1103/PhysRevLett.124.047401
M3 - Article
C2 - 32058776
AN - SCOPUS:85079520978
SN - 0031-9007
VL - 124
JO - Physical Review Letters
JF - Physical Review Letters
IS - 4
M1 - 047401
ER -