Universität zu Köln

Zacharias, Mario, Bartosch, Lorenz and Garst, Markus ORCID: 0000-0001-5390-3316 (2012). Mott Metal-Insulator Transition on Compressible Lattices. Phys. Rev. Lett., 109 (17). COLLEGE PK: AMER PHYSICAL SOC. ISSN 1079-7114

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Abstract

The critical properties of the finite temperature Mott end point are drastically altered by a coupling to crystal elasticity, i.e., whenever it is amenable to pressure tuning. Similar as for critical piezoelectric ferroelectrics, the Ising criticality of the electronic system is preempted by an isostructural instability, and long-range shear forces suppress microscopic fluctuations. As a result, the end point is governed by Landau criticality. Its hallmark is, thus, a breakdown of Hooke's law of elasticity with a nonlinear strain-stress relation characterized by a mean-field exponent. Based on a quantitative estimate, we predict critical elasticity to dominate the temperature range Delta T*/T-c similar or equal to 8%, close to the Mott end point of kappa-(BEDT-TTF)(2)X.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zacharias, Mario UNSPECIFIED UNSPECIFIED UNSPECIFIED Bartosch, Lorenz UNSPECIFIED UNSPECIFIED UNSPECIFIED Garst, Markus UNSPECIFIED orcid.org/0000-0001-5390-3316 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-480884
DOI:	10.1103/PhysRevLett.109.176401
Journal or Publication Title:	Phys. Rev. Lett.
Volume:	109
Number:	17
Date:	2012
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	1079-7114
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language CRITICAL-BEHAVIOR; MODEL Multiple languages Physics, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48088