Binding energies of surface polarons outside polar-crystal surfaces are calculated by considering interactions of electrons outside with both electronic and ionic polarizations of crystals quantum mechanically. Our results show that quantum-mechanical modifications of image potentials due to electronic polarizations reduce polaron binding energies by 40-55% compared to those calculated with image potentials due to electronic polarization approximated by their electrostatic limits; substitution of infinitely high frequencies for the finite vibrational frequencies of electronic polarizations, however, changes the calculated polaron binding energies by less than 10% for the wide-band materials considered.
部门归属
jiao tong univ,inst condensed matter phys,shanghai 200030,peoples r china. jiao tong univ,dept phys,shanghai 200030,peoples r china. acad sinica,int ctr mat phys,shenyang 110015,peoples r china.;sun, h (reprint author), chinese ctr adv sci & technol,world lab,beijing 100080,peoples r china
H. Sun,S. W. Gu. EFFECTS OF QUANTUM-MECHANICAL CORRECTIONS TO IMAGE POTENTIALS ON THE BINDING-ENERGIES OF SURFACE POLARONS OUTSIDE POLAR CRYSTALS[J]. Physical Review B,1991,44(3):1163-1167.
APA
H. Sun,&S. W. Gu.(1991).EFFECTS OF QUANTUM-MECHANICAL CORRECTIONS TO IMAGE POTENTIALS ON THE BINDING-ENERGIES OF SURFACE POLARONS OUTSIDE POLAR CRYSTALS.Physical Review B,44(3),1163-1167.
MLA
H. Sun,et al."EFFECTS OF QUANTUM-MECHANICAL CORRECTIONS TO IMAGE POTENTIALS ON THE BINDING-ENERGIES OF SURFACE POLARONS OUTSIDE POLAR CRYSTALS".Physical Review B 44.3(1991):1163-1167.
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