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The Origin of the Pseudogap Phase: Precursor Superconductivity Versus a Competing Energy Gap Scenario by K. Levin; Qijin Chen; Ioan Kosztin; Boldizsár Jankó; Ying-Jer Kao; Andrew Iyengar is a Materials Science article available to read on EtoBox.
What is The Origin of the Pseudogap Phase: Precursor Superconductivity Versus a Competing Energy Gap Scenario about?
In the last few years evidence has been accumulating that there are a multiplicity of energy scales which characterize superconductivity in the underdoped cuprates. In contrast to the situation in BCS superconductors, the phase coherence temperature T c is different from the energy gap onset temperature T p . In addition, thermodynamic and tunneling spectroscopies have led to the inference that the order parameter D sc is to be distinguished from the excitation gap D; in this way, pseudogap effects persist below T c . It has been argued by many in the community that the presence of these distinct energy scales demonstrates that the pseudogap is unrelated to superconductivity. In this paper, we show that this inference is incorrect. We demonstrate that the difference between the order parameter and excitation gap and the contrasting dependences of T p and T c on hole concentration x and magnetic ®eld H follow from a natural generalization of BCS theory. This simple generalized form is based on a BCS-like ground state, but with self-consistently determined chemical potential in the presence of arbitrary attractive coupling g. We have applied this mean ®eld theory with some success to
Who reads The Origin of the Pseudogap Phase: Precursor Superconductivity Versus a Competing Energy Gap Scenario?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- K. Levin; Qijin Chen; Ioan Kosztin; Boldizsár Jankó; Ying-Jer Kao; Andrew Iyengar
- Publisher
- Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0022-3697)
- Published
- 2002
- Language
- EN
- Field
- Materials Science (Physical Sciences)