Paltzer, U. and De Wette, F. W. and Schröder, Ulrich and Rampf, E. (1998) Surface dynamics of Bi2CaSr2Cu2O8. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 301 (1-2). pp. 55-71. ISSN 0921-4534
Full text not available from this repository.Abstract
The high-T-c superconductor Bi2CaSr2Cu2O8 (Bi 2:1:2:2) exhibits a superstructure in the bulk which is manifested at the surface. Helium atom scattering (HAS) from the (001) Bi-O surface has revealed unusual features of the surface phonons, such as the occurrence of apparently rather dispersionless surface modes and an only weak dependence of surface mode dispersion on direction in the surface. We report lattice dynamical calculations of a (001) slab of Bi 2:1:2:2 material, bounded by Bi-O surfaces. The calculations are based on shell model interactions, and take proper account of surface relaxation. We find that the above mentioned features of the surface phonon modes are direct consequences of the anisotropic surface structure. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SINGLE-CRYSTALS; PHYSICAL-PROPERTIES; ELASTIC PROPERTIES; SOUND VELOCITIES; BI2SR2CACU2O8; PHONONS; MODES; SUPERCONDUCTORS; SPECTROSCOPY; SCATTERING; high-T-c superconductor Bi2CaSr2Cu2O8; surface phonon modes; anisotropic surface structure |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 Feb 2023 07:46 |
| Last Modified: | 24 Feb 2023 07:46 |
| URI: | https://pred.uni-regensburg.de/id/eprint/49805 |
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