Dependence of superconducting transition temperature on doping and structural distortion of the CuO{sub 2} planes in La{sub 2{minus}{ital x}}M{sub {ital x}}CuO{sub 4} (M=Nd, Ca, Sr)
- Physics Department, Northern Illinois University, DeKalb, Illinois 60115 (United States)
- Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
By comparing structural and superconducting properties of La{sub 2{minus}{ital x}{minus}{ital y}}Ca{sub {ital x}}Nd{sub {ital y}}CuO{sub 4} to La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4} we have separated the effects of structure and doping on the superconducting {ital T}{sub {ital c}}. At a fixed doping level, the highest {ital T}{sub {ital c}} is found for flat and square CuO{sub 2} planes in the tetragonal structure. {ital T}{sub {ital c}} is reduced by the structural distortions of the CuO{sub 2} planes in the orthorhombic structure. The local minimum of {ital T}{sub {ital c}} vs doping observed around {ital x}{approximately}0.12 indicates the presence of a weakly split singularity of the electronic density of states for the orthorhombic material. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 284536
- Journal Information:
- Physical Review Letters, Vol. 76, Issue 8; Other Information: PBD: Feb 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Cationic substitution and role of oxygen in the n -type superconducting T prime system Nd sub 2 minus y Ce sub y CuO sub z
Relationship between weak ferromagnetism, superconductivity, and lattice parameter in the [ital A][sub 2[minus][ital x][minus][ital y]][ital B][sub [ital x]]Ce[sub [ital y]]CuO[sub 4] ([ital A],[ital B][equivalent to]La, Pr, Nd, Sm, Eu, Gd, Y) compounds