Spin ladders and quantum simulators for Tomonaga–Luttinger liquids

Ward, Simon; Bouillot, Pierre; Ryll, Hanjo; Kiefer, Klaus; Krämer, Karl; Rüegg, Christian; Kollath, Corinna; Giamarchi, Thierry (2013). Spin ladders and quantum simulators for Tomonaga–Luttinger liquids. Journal of Physics: Condensed Matter, 25(1), 014004. Bristol: Institute of Physics Publishing IOP 10.1088/0953-8984/25/1/014004

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Magnetic insulators have proven to be usable as quantum simulators for itinerant interacting quantum systems. In particular the compound (C5H12N)2CuBr4 (for short: (Hpip)2CuBr4) was shown to be a remarkable realization of a Tomonaga–Luttinger liquid (TLL) and allowed us to quantitatively test the TLL theory. Substitution weakly disorders this class of compounds and thus allows us to use them to tackle questions pertaining to the effect of disorder in TLL as well, such as that of the formation of the Bose glass. In this paper we present, as a first step in this direction, a study of the properties of the related (Hpip)2CuCl4 compound. We determine the exchange couplings and compute the temperature and magnetic field dependence of the specific heat, using a finite temperature density matrix renormalization group procedure. Comparison with the measured specific heat at zero magnetic field confirms the exchange parameters and Hamiltonian for the (Hpip)2CuCl4 compound, giving the basis needed to begin studying the disorder effects.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Chemistry, Biochemistry and Pharmaceutical Sciences (DCBP)

UniBE Contributor:

Krämer, Karl

Subjects:

500 Science > 530 Physics
500 Science > 540 Chemistry

ISSN:

0953-8984

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Karl Krämer

Date Deposited:

16 Dec 2013 16:47

Last Modified:

24 Feb 2020 09:28

Publisher DOI:

10.1088/0953-8984/25/1/014004

Web of Science ID:

000312105900006

BORIS DOI:

10.7892/boris.39103

URI:

https://boris.unibe.ch/id/eprint/39103

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