Universität zu Köln

Altland, Alexander ORCID: 0000-0002-2991-4805, Bagrets, Dmitry and Kamenev, Alex (2019). Quantum Criticality of Granular Sachdev-Ye-Kitaev Matter. Phys. Rev. Lett., 123 (10). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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Abstract

We consider granular quantum matter defined by Sachdev-Ye-Kitaev dots coupled via random one-body hopping. Within the framework of Schwarzian field theory, we identify a zero-temperature quantum phase transition between an insulating phase at weak and a metallic phase at strong hopping. The critical hopping strength scales inversely with the number of degrees of freedom on the dots. The increase of temperature out of either phase induces a crossover into a regime of strange metallic behavior.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Altland, Alexander UNSPECIFIED orcid.org/0000-0002-2991-4805 UNSPECIFIED Bagrets, Dmitry UNSPECIFIED UNSPECIFIED UNSPECIFIED Kamenev, Alex UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-141746
DOI:	10.1103/PhysRevLett.123.106601
Journal or Publication Title:	Phys. Rev. Lett.
Volume:	123
Number:	10
Date:	2019
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1079-7114
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute for Theoretical Physics
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRANSPORT Multiple languages Physics, Multidisciplinary Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/14174