STM/STS and Tunneling spectroscopy measurements on Bi2212

--- Low bias STM ---	--- STS of Cu-O layer ---
Cu-O layer selective STM imaging	spatial dependence of SC gap

STM image of Cu-O at T=5K	4a X 4a charge order in underdoped sample at T=9K	Inhomogeneous STS spectra taken on the sample exhibiting 4a X 4a charge order	Homogeneous STS spectra taken on the sample exhibiting no 4a X 4a charge order
Phys. Rev. B53, 2253 (1996)	J. Phys. Soc. Jpn, 74 (2005)	cond-mat/0512496