ARPES investigation of deeply underdoped BISCO 2212

ORAL

Abstract

We present ARPES results from deeply underdoped BISCO 2212 with Tc ranging from 30 to 50 K. The improved sample quality with Y subsitution enables the detection of much sharper spectral features. We uncovered experimental evidence for two distinct energy gaps in these deeply underdoped samples. The theoretical implications of these findings will de discussed in conjunction with ARPES and RAMAN data.

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Authors

  • K. Tanaka

  • W. S. Lee

  • D. H. Lu

  • T. Fujii

  • A. Fujimori

  • Z. Hussain

  • Z. X. Shen