Abstract
In a variety of superconductors, mostly in two-dimensional (2D) and one-dimensional (1D) systems, the resistive superconducting transition R(T) demonstrates in many cases an anomalous narrow R(T) peak just preceding the onset of the superconducting state R = 0 at T-c. The amplitude of this R(T) peak in 1D and 2D systems ranges from a few up to several hundred percent. In three-dimensional (3D) systems, however, the R(T) peak close to T-c is rarely observed, and it reaches only a few percent in amplitude. Here we report on the observation of a giant (similar to 1600%) and very narrow (similar to 1 K) resistance peak preceding the onset of superconductivity in heavily boron-doped diamond. This anomalous R(T) peak in a 3D system is interpreted in the framework of an empirical model based on the metal-bosonic insulator-superconductor transitions induced by a granularity-correlated disorder in heavily doped diamond. DOI: 10.1103/PhysRevLett.110.077001
Original language | English |
---|---|
Article number | 077001 |
Number of pages | 5 |
Journal | Physical Review Letters |
Volume | 110 |
Issue number | 7 |
DOIs | |
Publication status | Published - 11 Feb 2013 |
Keywords
- RESISTANCE-PEAK
- THIN-FILMS
- T-C
- TEMPERATURE
- RESISTIVITY
- BI2SR2CACU2O8+DELTA
- PSEUDOGAP
- ANOMALIES
- FIBERS
- ORIGIN