Evolution of a polaron band through the phase diagram of Nd[2-x]Ce[x]CuO[4-y]
Evolution of a polaron band through the phase diagram of Nd[2-x]Ce[x]CuO[4-y]
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极化子能带通过 Nd[2-x]Ce[x]CuO[4-y] 相图的演变
DOI：
10.1103/physrevlett.83.4852
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发表时间：
1999
影响因子：
8.6
通讯作者：
P. Roy
中科院分区：
文献类型：
--
作者：
S. Lupi;P. Maselli;M. Capizzi;P. Calvani;P. Giura;P. Roy
在整个相图中，首先跟踪了一类高t__c超导体中极性吸收随掺杂和温度的变化。极化子带随着掺杂的增加而变软，在超导相中仍然存在，而在过掺杂的金属相中消失。这些结果指向低温下极化子聚集的存在，并可能为越来越多的多极化子系统的理论描述提供实验基础。
The evolution with doping and temperature of the polaronic absorption in a family of high-T$_c$ superconductors is first followed here across the whole phase diagram. The polaron band softens with increasing doping, is still present in the superconducting phase, and vanishes in the overdoped metallic phase. These results point toward the existence of polaron aggregates at low temperature and may provide an experimental ground for the increasing number of theoretical descriptions of many-polaron systems.