d-wave anisotropy and coexistence of the superconducting gap and pseudogap in La2−xSrxCuO4/Ag junctions
T. Miyake, T. Imaizumi, I. Iguchi
DOI 10.1103/PhysRevB.68.214520 · Physical Review B
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Abstract
We present the angle-resolved tunneling spectroscopy of La2−xSrxCuO4 (LSCO)/Ag junctions. The observed tunnel conductance curves show the superconducting gap (SG) at 9±1mV for the near optimally doped samples and at 11±1mV for the underdoped samples. They also show strong decrease of conductance at a few tens of mV corresponding to the possible pseudogap (PG) for zero- and finite-angle junctions. Besides, the zero bias conductance peak (ZBCP) is observable for finite-angle junctions. The simultaneous observation of SG, PG, and ZBCP implies the coexistence of superconducting gap and pseudogap with the d-wave order parameter for LSCO.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | onset |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 23 | Pressure not reported | onset |
| La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 34 | Pressure not reported | onset |
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