Unconventionally large quantum-dissipative gap regime in overdoped Bi 2 Sr 2 CaCu 2 O 8+y
Unconventionally large quantum-dissipative gap regime in overdoped Bi 2 Sr 2 CaCu 2 O 8+y
复制标题
过掺杂 Bi 2 Sr 2 CaCu 2 O 8 y 中非常规大的量子耗散带隙区域
DOI：
10.1103/physrevb.67.064514
复制
发表时间：
2003
影响因子：
3.7
通讯作者：
C. Mielke
中科院分区：
文献类型：
--
作者：
T. Shibauchi;L. Krusin;G. Blatter;C. Mielke
We report on an unexpectedly extensive dissipative gapped regime in the zero-temperature (quantum) limit in highly overdoped ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+y}.$ Using high-field interlayer resistivity measurements we show that as $\stackrel{\ensuremath{\rightarrow}}{T}0$ the magnetic field that closes the pseudogap and the upper critical field ${H}_{c2}$ coincide, uniquely defining the upper limit on the vortex state. By mapping the upper and lower bounds on the molten vortex state, we find the gapped quantum fluctuation regime stretching from $\ensuremath{\sim}30$ to 70 T. This exceeds by far the conventional estimates, pointing to the anomalous gapped nature of the strongly overdoped regime.
We report on an unexpectedly extensive dissipative gapped regime in the zero-temperature (quantum) limit in highly overdoped ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+y}.$ Using high-field interlayer resistivity measurements we show that as $\stackrel{\ensuremath{\rightarrow}}{T}0$ the magnetic field that closes the pseudogap and the upper critical field ${H}_{c2}$ coincide, uniquely defining the upper limit on the vortex state. By mapping the upper and lower bounds on the molten vortex state, we find the gapped quantum fluctuation regime stretching from $\ensuremath{\sim}30$ to 70 T. This exceeds by far the conventional estimates, pointing to the anomalous gapped nature of the strongly overdoped regime.