High-temperature superfluorescence in methyl ammonium lead iodide
High-temperature superfluorescence in methyl ammonium lead iodide
复制标题
DOI：
10.1038/s41566-021-00830-x
复制
发表时间：
2021-06-21
期刊：
影响因子：
35
通讯作者：
Gundogdu, Kenan
中科院分区：
文献类型：
--
作者：
Findik, Gamze;Biliroglu, Melike;Gundogdu, Kenan
光-物质相互作用可以在固体中创造和操纵集体多体相（1-3），这对新兴量子应用的实现很有希望。然而，在大多数情况下，这些集体量子态是脆弱的，具有短的退相干和消相时间，限制了它们在诸如低温和/或高磁场等微妙条件下的精确定制结构。在这项工作中，我们发现原型杂化钙钛矿，MAPbi(3)薄膜，在78 K及以上表现出这种集体相干量子多体相，即超荧光。脉冲激光激发首先产生高能电子空穴对，这些电子空穴对迅速弛豫到较低的能量域，然后通过自发同步发展宏观量子相干性。这种薄膜的光谱特征和种群动力学的激发通量依赖性明确地证实了超荧光的所有众所周知的特性。这些结果表明，混合钙钛矿中集体相干态的创建和操纵可以用作量子应用的基本构建块（4,5）。
Light-matter interactions can create and manipulate collective many-body phases in solids(1-3), which are promising for the realization of emerging quantum applications. However, in most cases, these collective quantum states are fragile, with a short decoherence and dephasing time, limiting their existence to precision tailored structures under delicate conditions such as cryogenic temperatures and/or high magnetic fields. In this work, we discovered that the archetypal hybrid perovskite, MAPbi(3) thin film, exhibits such a collective coherent quantum many-body phase, namely superfluorescence, at 78 K and above. Pulsed laser excitation first creates a population of high-energy electron-hole pairs, which quickly relax to lower energy domains and then develop a macroscopic quantum coherence through spontaneous synchronization. The excitation fluence dependence of the spectroscopic features and the population kinetics in such films unambiguously confirm all the well-known characteristics of superfluorescence. These results show that the creation and manipulation of collective coherent states in hybrid perovskites can be used as the basic building blocks for quantum applications(4,5).