Infrared conductivity of cuprates using Yang-Rice-Zhang ansatz: Review of our recent investigations
- Physical Research Laboratory, Navrangpura, Ahmedabad-380009 India, email: navinder.phy@gmail.com, and (India)
- H. P. University, Shimla, Himachal Pradesh (India)
A review of our recent investigations related to the ac transport properties in the psedogapped state of cuprate high temperature superconductors is presented. For our theoretical calculations we use a phenomenological Green’s function proposed by Yang, Rice and Zhang (YRZ). This is based upon the renormalized mean-field theory of the Hubbard model and takes into account the strong electron-electron interaction present in Cuprates. The pseudogap is also taken into account through a proposed self energy. We have tested the form of the Green’s function by computing ac conductivity of cuprates and then compared with experimental results. We found agreement between theory and experiment in reproducing the doping evolution of ac conductivity but there is a problem with absolute magnitudes and their frequency dependence. This shows a partial success of the YRZ ansatz. The ways to rectify it are suggested and worked out.
- OSTI ID:
- 22391691
- Journal Information:
- AIP Conference Proceedings, Vol. 1661, Issue 1; Conference: ICCMP 2014: International Conference on Condensed Matter Physics 2014, Shimla (India), 4-6 Nov 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPARATIVE EVALUATIONS
CUPRATES
ELECTRIC CONDUCTIVITY
ELECTRON-ELECTRON COUPLING
ENERGY GAP
FREQUENCY DEPENDENCE
HIGH-TC SUPERCONDUCTORS
HUBBARD MODEL
INFRARED RADIATION
MEAN-FIELD THEORY
RENORMALIZATION
SELF-ENERGY