A low-energy four-leaf clover-shaped electronic state, about two lattice units wide, exists in underdoped Bi-2212, fades with hole doping, and can be locally erased and restored by tip voltage.
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Visualization and manipulation of four-leaf clover-shaped electronic state in cuprate
A low-energy four-leaf clover-shaped electronic state, about two lattice units wide, exists in underdoped Bi-2212, fades with hole doping, and can be locally erased and restored by tip voltage.