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The strictly attractive 1/l interaction between steps of crystal surfaces |
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| Authors: | Guozhong Wang JF Webb |
| Institution: | a Department of Physics, Wenzhou Normal College, Wenzhou 325027, PR China b School of Engineering and Science, Curtin University of Technology, Sarawak Campus Malaysia, CDT 250, 98009 Miri, Sarawak, Malaysia c National Laboratory of Surface Physics, Fudan University, Shanghai 200433, PR China |
| Abstract: | Using SSH model for the step structure of crystal surfaces, a strictly attractive 1/l2 energy, which originates from the quantum effect of surface atoms’ collective relaxation, was obtained for the first time and shown to generally exist between steps. The repulsive 1/l step interaction was confirmed to come from the surface electrons’ interaction. These results are crucial for understanding the dynamics of steps and for reconciling the dilemma associated with the equilibrium crystal shape of gold crystallites. |
| Keywords: | Step interaction Crystal surface SSH model Equilibrium crystal shape |
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