1. 3 A 2 6 5 4 1
Figure 1. Schematic of a conventional scanning tunneling microscope (STM).

2. Figure Captions for Figs. 1 and 2
Atomic structure of the sample surface
Single-atom probing tip
Scanning control system
Electronic control circuit
Electrical bias
Electronic feedback circuit
Electron wave functions of the surface atoms of the sample
Electron wave function of the protruding atom of the probing tip 2 3 4 5 6 7 8

3. 8 7
Figure 2. Schematic of the mechanism of interaction between electron wave functions of the conventional probe tip and sample surface.

4. 3 A 2 6 5 4 1
Figure 3. Schematic of the coherent dual-tip scanning probe microscope.

5. Figure Captions for Figs. 3 and 41
Figure Captions for Figs. 3 and 4
Atomic structure of the sample surface
The coherent dual-tip probe with two coherent atomic tips
Scanning control system
Electronic control circuit
Electrical bias
Electronic feedback circuit
Electron wave functions of the surface atoms of the sample
Electron wave functions of the protruding atoms of the dual-tip probe
The pattern of interferenced electron wave functions from two coherent atomic tips provides a high-contrast and high-resolution probe. 2 3 4 5 6 7 8 9

6. 8 q 9 7
Figure 4. Schematic of the mechanism of interaction between electron wave functions of the coherent dual-tip probe and sample surface.