Abstract
The interlayer tunneling spectroscopy (ITS) in Bi2Sr2CaCu2O8+x (Bi‐2212) intrinsic junctions (IJs) reveals the quasiparticle excitation spectrum in the material. In this study, using a proportional‐integral‐derivative (PID) temperature control scheme incorporated with the in‐situ temperature measurements of stacks of IJs under study, we eliminate the artifact in the ITS, which is often caused by the self‐heating in the high‐bias region. Thus‐measured spectral weight distribution with the clear peak‐dip‐hump structure exhibits subtle differences from that obtained without the PID control, which may provide in the long run a crucial guidance to understanding the mechanism of high‐Tc superconductivity.
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