Metal-insulator transition in the presence of excitonic correlation
- 15 April 1996
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 79 (8), 6345-6346
- https://doi.org/10.1063/1.361995
Abstract
We study the possibility of an excitonic transition in a two-band model and show that a true phase transition does not occur in the presence of hybridization since the one-body mixing term acts as a conjugate field to the order parameter of the excitonic phase. We suggest an alternative interpretation for recent experiments on rare earth semiconductors based on a metal-insulator transition associated with the opening or closing of a hybridization gap at a critical pressure.Keywords
This publication has 12 references indexed in Scilit:
- Sm: Kondo Insulator or Exotic Metal?Physical Review Letters, 1995
- Pressure-driven metal-insulator transition in La-doped SmS: Excitonic condensationPhysical Review B, 1995
- Metal-insulator transition in semi-metals and Kondo insulatorsPhysics Letters A, 1995
- Quantum scaling in many-body systemsPhysics Reports, 1994
- Intermediate valence and the possibility of a magnetic excitonic insulatorIEEE Transactions on Magnetics, 1994
- Thermodynamic properties of Kondo insulatorsPhysical Review B, 1994
- Excitonic insulator phase inPhysical Review Letters, 1991
- Pressure-driven semiconductor-metal transition in intermediate-valence and the concept of an excitonic insulatorPhysical Review B, 1990
- Metal-Insulator Transitions: A Simple Theoretical ModelPhysical Review B, 1970
- Electron Correlation in Ferromagnetism. II. Hybridization ofandBandsPhysical Review B, 1970