Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2003-07-18
J.Phys.: Condens. Matter Vol.15 (2003) 4045-4087
Physics
Condensed Matter
Strongly Correlated Electrons
49 pages, 23 figures
Scientific paper
10.1088/0953-8984/15/24/301
A many-body theory of paramagnetic Kondo insulators is described, focusing specifically on single-particle dynamics, scattering rates, d.c. transport and optical conductivities. This is achieved by development of a non-perturbative local moment approach to the symmetric periodic Anderson model within the framework of dynamical mean-field theory. Our natural focus is the strong coupling, Kondo lattice regime; in particular the resultant `universal' scaling behaviour in terms of the single, exponentially small low-energy scale characteristic of the problem. Dynamics/transport on all relevant ($\omega, T$) scales are considered, from the gapped/activated behaviour characteristic of the low-temperature insulator through to explicit connection to single-impurity physics at high $\omega$ and/or $T$; and for optical conductivities emphasis is given to the nature of the optical gap, the temperature scale responsible for its destruction, and the consequent clear distinction between indirect and direct gap scales. Using scaling, explicit comparison is also made to experimental results for d.c. transport and optical conductivites of Ce_3Bi_4Pt_3, SmB_6 and YbB_{12}. Good agreement is found, even quantitatively; and a mutually consistent picture of transport and optics results.
Krishnamurthy H. R.
Logan David E.
Smith Victoria E.
Vidhyadhiraja N. S.
No associations
LandOfFree
Dynamics and transport properties of Kondo insulators does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dynamics and transport properties of Kondo insulators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamics and transport properties of Kondo insulators will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-489206