Sachdev-Ye-Kitaev Non-Fermi-Liquid Correlations in Nanoscopic Quantum Transport.
Sachdev-Ye-Kitaev Non-Fermi-Liquid Correlations in Nanoscopic Quantum Transport.
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纳米量子输运中的 Sachdev-Ye-Kitaev 非费米液体相关性。
DOI：
10.1103/physrevlett.123.226801
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发表时间：
2019
影响因子：
8.6
通讯作者：
A. Kamenev
中科院分区：
文献类型：
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作者：
A. Altland;D. Bagrets;A. Kamenev
纳米结构中的电子传输，如长分子或2D剥落的薄片，通常通过一组近乎简并的单粒子轨道。在这种情况下，窄带和强e-e相互作用的共谋可以稳定复数Sachdev-Ye-Kitaev(SYK)模型普适类中的非费米-液体相。在量子输运中，我们证明了电导中存在反常的幂定律，包括非弹性共隧穿通道中的代数标度T^{3/2}，它与传统的费米液体T^{2}标度通过量子相变相分离。获得这些结果的相对稳健的条件表明，SYK非费米液体普适类可能并不像之前认为的那样奇特。
Electronic transport in nanostructures, such as long molecules or 2D exfoliated flakes, often goes through a nearly degenerate set of single-particle orbitals. Here we show that in such cases a conspiracy of the narrow band and strong e-e interactions may stabilize a non-Fermi-liquid phase in the universality class of the complex Sachdev-Ye-Kitaev (SYK) model. Focusing on signatures in quantum transport, we demonstrate the existence of anomalous power laws in the temperature dependent conductance, including algebraic scaling T^{3/2} in the inelastic cotunneling channel, separated from the conventional Fermi liquid T^{2} scaling via a quantum phase transition. The relatively robust conditions under which these results are obtained indicate that the SYK non-Fermi-liquid universality class might not be as exotic as previously thought.
影响因子：
--
作者：
J. D. Urbina;K. Richter
通讯作者：
K. Richter