The crossover from superconducting gap to pseudogap is considered. We showthat the superconductivity is destroyed at the temperature $T_c$, with thesuperconducting gap being smoothly transformed into the pseudogap. Relations,which are of general interest, between the maximum values of the gap$\Delta_1$, $T_c$ and $T^*$ are established. We presents arguments that $T^*$as a function of the doping level $x$ is approximately a straight line thatcrosses the abscissa at some point $x_{FC}$. In the vicinity of this point$T^*$ coincides with $T_c$, and at $x=x_{FC}$ the fermion condensation quantumphase transition takes place.
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机译:考虑了从超导间隙到伪间隙的交叉。我们表明,在温度$ T_c $时,超导被破坏,超导间隙被平滑地转换为伪间隙。建立间隙$ \ Delta_1 $,$ T_c $和$ T ^ * $的最大值之间的一般关注关系。我们提出了这样的论点,即作为掺杂水平$ x $的函数的$ T ^ * $近似为在某点$ x_ {FC} $处横坐标的直线。在该点附近,$ T ^ * $与$ T_c $一致,并且在$ x = x_ {FC} $时发生费米子缩合量子相变。
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