352 citations · 3.4k across the 93 of their papers we have counts for
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Anomalous thermodynamics of a quantum spin system with large residual entropy
J. Richter, J. Schulenburg, D. V. Dmitriev +2
In contrast to strongly frustrated classical systems, their quantum counterparts typically have a non-degenerate ground state. A counterexample is the celebrated Heisenberg sawtoot…
Loop-gas description of the localized-magnon states on the kagome lattice with open boundary conditions
Andreas Honecker, Johannes Richter, Jürgen Schnack +1
The high-field regime of the spin-s XXZ antiferromagnet on the kagome lattice gives rise to macroscopically degenerate ground states thanks to a completely flat lowest single-magno…
Supersymmetric spin-phonon coupling prevents odd integer spins from quantum tunneling
K. Irländer, H. -J. Schmidt, J. Schnack
Quantum tunneling of the magnetization is a phenomenon that impedes the use of small anisotropic spin systems for storage purposes even at the lowest temperatures. Phonons, usually…
Environment-controlled Floquet-state paramagnetism
Onno R. Diermann, Heinz-Jürgen Schmidt, Jürgen Schnack +1
We study the response of ideal spin systems which are interacting with both a strong oscillating magnetic field, and a thermal environment, to a weak probing magnetic field. We dem…
Flat-band physics in the spin-1/2 sawtooth chain
Oleg Derzhko, Jürgen Schnack, D. V. Dmitriev +2
We consider the strongly anisotropic spin-1/2 model on the sawtooth-chain lattice with ferromagnetic longitudinal interaction and aniferromagnetic transversal int…
Spin-phonon interaction induces tunnel splitting in single-molecule magnets
K. Irländer, J. Schnack
Quantum tunneling of the magnetization is a major obstacle to the use of single-molecule magnets (SMMs) as basic constituents of next-generation storage devices. In this context, p…
Adapting Planck's route to investigate the thermodynamics of the spin-half pyrochlore Heisenberg antiferromagnet
Oleg Derzhko, Taras Hutak, Taras Krokhmalskii +2
The spin-half pyrochlore Heisenberg antiferromagnet (PHAF) is one of the most challenging problems in the field of highly frustrated quantum magnetism. Stimulated by the seminal pa…
Finite-size scaling of typicality-based estimates
J. Schnack, J. Richter, T. Heitmann +1
According to the concept of typicality, an ensemble average can be accurately approximated by an expectation value with respect to a single pure state drawn at random from a high-d…
Decoherence of a singlet-triplet superposition state under dipolar interactions of an uncorrelated environment
P. Vorndamme, J. Schnack
Recently it was shown that by means of an STM it is experimentally possible to stimulate clock transitions between the singlet and the non-magnetic triplet state of a Heisenberg-co…