Charge dynamics near the electron-correlation induced metal-insulator transition in pyrochlore-type molybdates
- The systematics of the bandwidth controlled metal-insulator transition (MIT) are investigated for R2Mo2O7 (R=Nd, Sm, Gd, Dy, and Ho) by measurements of dc and optical conductivity. The substantial role of electron correlation in driving the MIT is verified. With changing the R ionic radius (r) or equivalently the one-electron bandwidth, the T=0 K MIT occurs at rc≈r(R=Gd). The T=0 K gap continuously vanishes as Δ∝(rc−r), while at the metallic side the decrease of Drude weight is followed towards rc. A high-temperature incoherent state is approached through crossover regions both from the metallic and the insulating state.
| Author: | István KézsmárkiORCiDGND, N. Hanasaki, D. Hashimoto, S. Iguchi, Y. Taguchi, S. Miyasaka, Y. Tokura |
|---|---|
| URN: | urn:nbn:de:bvb:384-opus4-442141 |
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/44214 |
| ISSN: | 0031-9007OPAC |
| ISSN: | 1079-7114OPAC |
| Parent Title (English): | Physical Review Letters |
| Publisher: | American Physical Society (APS) |
| Type: | Article |
| Language: | English |
| Year of first Publication: | 2004 |
| Publishing Institution: | Universität Augsburg |
| Release Date: | 2018/11/29 |
| Volume: | 93 |
| Issue: | 26 |
| First Page: | 266401 |
| DOI: | https://doi.org/10.1103/physrevlett.93.266401 |
| Institutes: | Mathematisch-Naturwissenschaftlich-Technische Fakultät |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik | |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik V | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Licence (German): |  Deutsches Urheberrecht |
