Subgap structures in the current–voltage properties of La2−xSrxCuO4 intrinsic Josephson junctions

Localized rotating-modes in capacitively coupled intrinsic Josephson junctions: Systematic study of branching structure and collective dynamical instability

“…On the other hand, the multiple branch structure is not seen in LSCO and a single or a few hysteresis loops constitute the I -V characteristics. 18 The step-like structure with an almost equal spacing, which is not seen in Bi-2212, is also observed on the resistive branch in LSCO, indicating some dynamical instabilities taking place at the steps. 18 In this paper we present a systematic study on the nonlinear localized modes covering both strong and weak coupling regimes, using the CCJJ model.…”

“…18 The step-like structure with an almost equal spacing, which is not seen in Bi-2212, is also observed on the resistive branch in LSCO, indicating some dynamical instabilities taking place at the steps. 18 In this paper we present a systematic study on the nonlinear localized modes covering both strong and weak coupling regimes, using the CCJJ model. The I -V characteristics is investigated as a function of the capacitive coupling constant ␣.…”

Direct observation of intrinsic Josephson junction characteristics in electron-dopedSm2−xCexCuO4−Kawakami1, Suzuki2 2007Phys. Rev. B12020View full textAdd to dashboardCite

“…14 The observed values of J c for IJJs in SCCO lie between 1.4 kA/ cm 2 for slightly overdoped BSCCO ͑Ref. 29͒ at 5 K and 26 kA/ cm 2 for LSCO ͑x = 0.09͒ at 4.2 K. 30 A typical value for the Josephson plasma frequency p /2 for the n-type cuprates is 230 GHz, which lies between 107 GHz for BSCCO ͑Ref. 31͒ and 600 GHz for LSCO ͑x = 0.10͒.…”

Measurements of the switching current distribution in REBa2Cu3Oy(RE = Eu, Er) intrinsic Josephson junctions

“…The different value of the capacitive coupling constant in high-T c superconductors causes the significant difference in their I-V characteristics. It is known that the Bi2212 with a weak capacitive coupling constant commonly exhibit the multi branch structure [10], while collective switching instead of multiple-branch structure has been observed in (La,Sr) 2 CuO 4 with a strong one [11]. However the capacitive coupling constant is roughly determined by the material, it is controllable by tuning the value of γ.…”