Mott‐Limited Thermopower of Pascal Electron Liquid Phases at the LaAlO3/SrTiO3 Interface
Mott‐Limited Thermopower of Pascal Electron Liquid Phases at the LaAlO3/SrTiO3 Interface
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Mott-LaAlO3/SrTiO3 界面处帕斯卡电子液相的有限热电势
DOI：
10.1002/pssb.202200612
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发表时间：
2023
期刊：
影响因子：
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通讯作者：
Levy, Jeremy
中科院分区：
文献类型：
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作者：
Jiang, Puqing;Tang, Yuhe;Lee, Hyungwoo;Lee, Jung-Woo;Eom, Kitae;Eom, Chang-Beom;Ban, Heng;Irvin, Patrick;Levy, Jeremy
研究了 LaAlO3/SrTiO3 界面准一维电子波导在毫开温度下的热电特性。这些电子波导具有高度增强的振荡热电势，在电子耗尽状态下，其值在 0.1 K 时超过 100 μV K−1。控制非相互作用电子的带项热能的莫特关系与强吸引力的电子-电子相互作用导致先前报道的由电子束缚态解释的帕斯卡电导系列的实验结果非常吻合。这些结果为新兴电子液相的量化热传输研究铺平了道路，其中传输由电荷为电子整数倍或分数的准粒子控制。
The thermoelectric properties of quasi‐1D electron waveguides at the LaAlO3/SrTiO3interface at millikelvin temperatures are investigated. A highly enhanced and oscillating thermopower is found for these electron waveguides, with values exceeding 100 μV K−1at 0.1 K in the electron‐depletion regime. The Mott relation, which governs the band‐term thermopower of noninteracting electrons, agrees well with the experimental findings in and around regimes where strongly attractive electron–electron interactions lead to a previously reported Pascal series of conductance explained by bound states ofelectrons. These results pave the way for quantized thermal transport studies of emergent electron liquid phases in which transport is governed by quasiparticles with charges that are integer multiples or fractions of an electron.