Hostname: page-component-669899f699-g7b4s Total loading time: 0 Render date: 2025-04-30T02:32:32.109Z Has data issue: false hasContentIssue false
  • English
  • Français

Cooperative Pseudo Jahn-Teller Effect as Microscopic Mechanism of (OMT)-(LTT) Structural Phase Transition in La2−xBaxCuO4Superconductors

Published online by Cambridge University Press:  01 January 1992

Michael D. Kaplan
Michael D. Kaplan*
Affiliation:
Boston University, Physics Department, 590 Commonwealth Ave., MA 02215
Get access

Abstract

A microscopic mechanism for the structural phase transition from the orthorhombic mediate temperature (OMT) phase into the low temperature tetragonal (LTT) one is suggested on the basis of the cooperative pseudo Jahn-Teller effect. The local distortions mixing the ground and the first excited electronic states are ordered antiferrodistortively and are connected in part, with the oxygen octahedra rotations around the [100] axis. The results are in agreement, with the neutron scattering experiments data.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 291: Symposium O – Materials Theory and Modeling , 1992 , 223
Copyright
Copyright © Materials Research Society 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

REFERENCES

1.Proceedings of the Conference “Lattice Effects In High-Tc Superconductors”, Santa Fe, New Mexico, 1992 Google Scholar
2. Axe, J.D., Cox, D.E. et al. , IBM J. Res. Develop. 33, 382 (1989)Google Scholar
3. Suzuki, T., Fujita, T., J. Phys. Soc. Jap. 55, 1883, (1989)Google Scholar
4. Moodenbaugh, A.R., Xu, Y. et al. , Phys. Rev. B, 35, 4596 (1988)Google Scholar
5. Sera, M., Ando, Y. et al. , Solid State Commun., 69, 851 (1989)Google Scholar
6. Kaplan, M.D., Khomskii, D.I., JETP Lett., 47. 631 (1988)Google Scholar
7. Kaplan, M.D., In: High-Tc Superconductivity. Current Problems, ed. by Kiselev, A., Leningrad, , 184 (1989)Google Scholar
8. Kaplan, M.D., Physica C, 180, 351 (1991)Google Scholar
9. Lee, D.H., Ihm, J., Solid State Commun., 62, 8ll (1987)Google Scholar