Novel insulator to metal transition and superconductivity in Sr-doped La2CuO4
Creators
- 1. Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX (United States)
- 2. Department of Physics, University of Cincinnati, Cincinnati, OH (United States)
Description
We have studied the charge dynamics of Sr-doped La2CuO4 at hole concentration p=0.07. We observed a clear indication of the competition between two new characteristic collective modes of the Wigner lattice orders suggested earlier: one corresponds to a Tc = 15 K superconductivity and the other to Tc = 30 K. Our results naturally explain the recent observation of metallic transport in extremely low (1%) Sr-doped La2CuO4 and establish a novel insulator to metal transition mechanism and superconductivity in the two-dimensional Wigner lattice ground state. We suggest that the fluctuations of the relative phase between the superconducting condensate and the Wigner lattice order can provide an answer to the unidentified mode in the c-axis conductivity that appears only below Tc
Availability note (English)
Available online at http://stacks.iop.org/0953-8984/14/10377/c24332.pdf or at the Web site for the Journal of Physics. Condensed Matter (ISSN 1361-648X) http://www.iop.org/Additional details
Identifiers
- URL
- http://stacks.iop.org/0953-8984/14/10377/c24332.pdf; http://www.iop.org/;
- PII
- S0953-8984(02)38998-7;
Publishing Information
- Journal Title
- Journal of Physics. Condensed Matter
- Journal Volume
- 14
- Journal Issue
- 43
- Journal Page Range
- p. 10377-10387
- ISSN
- 0953-8984
- CODEN
- JCOMEL
INIS
- Country of Publication
- United Kingdom
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 34029884
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CHARGE COLLECTION; COPPER COMPOUNDS; DIELECTRIC MATERIALS; GROUND STATES; LANTHANUM COMPOUNDS; OXYGEN COMPOUNDS; STRONTIUM ADDITIONS; SUPERCONDUCTIVITY; TEMPERATURE RANGE 0013-0065 K; WIGNER EFFECT
- Descriptors DEC
- ALLOYS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ENERGY LEVELS; MATERIALS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; STRONTIUM ALLOYS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS