Quasiparticle Interference in STM As a Function of Temperature: Signatures of Coherence

Details Quasiparticle Interference in STM As a Function of Temperature: Signatures of Coherence Quasiparticle Interference in STM As a Function of Temperature: Signatures of Coherence

2009-04-20

arxiv.org/abs/0904.3114v2

Phys. Rev. B 80, 134504 (2009)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures

Scientific paper

10.1103/PhysRevB.80.134504

In this paper we explore the behavior of the quasi-particle interference pattern (QPI) of scanning tunneling microscopy as a function of temperature, $T$. After insuring a minimal consistency with photoemission, we find that the QPI pattern is profoundly sensitive to quasi-particle coherence and that it manifests two energy gap scales. The nearly dispersionless QPI pattern above $T_c$ is consistent with data on moderately underdoped cuprates. To illustrate the important two energy scale physics we present predictions of the QPI--inferred energy gaps as a function of $T$ for future experiments on moderately underdoped cuprates.

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