Altland, Alexander, Bagrets, Dmitry and Kamenev, Alex (2019). Sachdev-Ye-Kitaev Non-Fermi-Liquid Correlations in Nanoscopic Quantum Transport. Phys. Rev. Lett., 123 (22). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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Abstract

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.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Altland, AlexanderUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Bagrets, DmitryUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Kamenev, AlexUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-127108
DOI: 10.1103/PhysRevLett.123.226801
Journal or Publication Title: Phys. Rev. Lett.
Volume: 123
Number: 22
Date: 2019
Publisher: AMER PHYSICAL SOC
Place of Publication: COLLEGE PK
ISSN: 1079-7114
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
Physics, MultidisciplinaryMultiple languages
Refereed: Yes
URI: http://kups.ub.uni-koeln.de/id/eprint/12710

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