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Drude behavior in the far‐infrared conductivity of cuprate superconductors
Author(s) -
Liu H.L.,
Quijada M.,
Romero D.B.,
Tanner D.B.,
Zibold A.,
Carr G.L.,
Berger H.,
Forró L.,
Mihaly L.,
Cao G.,
O BeomHoan,
Markert J.T.,
Rice J.P.,
Burns M.J.,
Delin K.A.
Publication year - 2006
Publication title -
annalen der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.009
H-Index - 68
eISSN - 1521-3889
pISSN - 0003-3804
DOI - 10.1002/andp.200510205
Subject(s) - quasiparticle , far infrared , cuprate , optical conductivity , superconductivity , scattering rate , physics , drude model , generalization , condensed matter physics , conductivity , scattering , variety (cybernetics) , infrared , perspective (graphical) , theoretical physics , statistical physics , quantum mechanics , computer science , epistemology , philosophy , artificial intelligence
When viewed at frequencies below about 8 THz (250 cm ‐1 ; 30 meV) the ab ‐plane optical conductivity of the cuprate superconductors (in their normal state) is well described by a Drude model. Examples include optimally‐doped YBa 2 Cu 3 O 7‐δ and Bi 2 Sr 2 CaCu 2 O 8 ; even the underdoped phases have a Drude character to their optical conductivity. A residual Drude‐like normal fluid is seen in the superconducting state in most cases; the scattering rate of this quasiparticle contribution collapses at T c .