Charge inhomogeneity and high temperature superconductivity
- Brookhaven National Lab., Upton, NY (United States)
- California Univ., Los Angeles, CA (United States). Dept. of Physics
When the condensation of a gas of fermions into a (self-bound) liquid state is frustrated by the long-range Coulomb interaction, the consequence is a large local fluctuation of the charge density, together with pairing on a high energy scale. The competition between these two effects at long length scales determines the nature of the ordered state at low temperatures. Evidence for the central role of this competition in determining the physical properties of the high temperature superconductors is provided by the delicate interplay of superconductivity, charge and spin ordering, and structural phase transformations in the La{sub 2}CuO{sub 4} family of materials. There the gas-liquid transition corresponds to the phase separation of holes doped into an antiferromagnetic insulator. Because of the low superfluid density and poor conductivity, the critical temperature for the superconducting transition in underdoped and optimally doped materials is governed by the onset of phase coherence and not by the pairing energy scale.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 231316
- Report Number(s):
- BNL-62945; CONF-960366-4; ON: DE96009690
- Resource Relation:
- Conference: 10. anniversary high temperature superconductivity workshop on physics, materials and applications, Houston, TX (United States), 12-16 Mar 1996; Other Information: PBD: [1996]
- Country of Publication:
- United States
- Language:
- English
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