Phase diagram of Coulomb interactions across the metal-insulator transition in Si:B.
Journal Article
·
· Proposed for publication in Physical Review Letters.
Measurements of the single-particle density of states (DOS) near T=0 ?K in Si:B are used to construct an energy-density phase diagram of Coulomb interactions across the critical density n{sub c} of the metal-insulator transition. Insulators and metals are found to be distinguishable only below a phase boundary (|n/n{sub c}-1|) determined by the Coulomb energy. Above ? is a mixed state where metals and insulators equidistant from n{sub c} cannot be distinguished from their DOS structure. The data imply a diverging screening radius at n{sub c}, which may signal an interaction-driven thermodynamic state change.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 961652
- Report Number(s):
- SAND2004-4191J
- Journal Information:
- Proposed for publication in Physical Review Letters., Journal Name: Proposed for publication in Physical Review Letters. Journal Issue: 25 Vol. 93; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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