Electron-Phonon Interactions, Metal-Insulator Transitions, and Holographic Massive Gravity
Electron-Phonon Interactions, Metal-Insulator Transitions, and Holographic Massive Gravity
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DOI：
10.1103/physrevlett.114.251602
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发表时间：
2015-06-23
影响因子：
8.6
通讯作者：
Pujolas, Oriol
中科院分区：
文献类型：
--
作者：
Baggioli, Matteo;Pujolas, Oriol
重力全息地双重作用于具有动量松弛的“真实”材料。双引力子势编码了声子动力学，它允许比目前所考虑的更广泛的多样性。我们构造了一个简单的各向同性和均匀的材料家族，它展示了一个由相互作用驱动的金属-绝缘体转变。这种跃迁与极化子-声子-电子准束缚态的形成有关，这些态主导着导电性，将光谱权重转移到质量间隙以上。我们描述了极化子的带隙、宽度和色散。
Massive gravity is holographically dual to "realistic" materials with momentum relaxation. The dual graviton potential encodes the phonon dynamics, and it allows for a much broader diversity than considered so far. We construct a simple family of isotropic and homogeneous materials that exhibit an interaction-driven metal-insulator transition. The transition relates to the formation of polarons-phonon-electron quasibound states that dominate the conductivities, shifting the spectral weight above a mass gap. We characterize the polaron gap, width, and dispersion.