Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:cond-mat/9908407 · The European Physical Journal B

Pressure dependence and non-universal effects of microscopic couplings on the spin-Peierls transition in CuGeO

R. Raupach, Andreas Klümper, F. Schönfeld

Published Aug 1, 2000• 6 citations
arXivHTMLPDF
DOI
10.1007/s100510070159

Related papers

Solitons in the spin-Peierls compound CuGeO 3

Antonio S. T. Pires

The European Physical Journal B•Feb 1, 2003•2 citations

Effects of quantum lattice vibration on the spin–Peierls transition

Hiroaki Onishi, Seiji Miyashita

Physica B Condensed Matter•Apr 4, 2003•0 citations

Renormalization of the spin-Peierls transition due to phonon dynamics

Simon Trebst, N Elstner, H Monien

We report results from a systematic strong-coupling expansion of a spin-½ Heisenberg chain coupled to Einstein phonons and a frustrating next-nearest-neighbor spin interaction. It is not obvious which interaction dominates in the regime of small coupling constants. In the non-adiabatic regime (ℏΩ ≈ J ) this model is used to describe the zero-temperature properties of CuGeO 3 . The linked cluster expansion allows the determination of observables in the thermodynamic limit preserving the full lattice dynamics without a truncation of the phononic Hilbert space. We show that the spin-phonon coupling leads to a renormalization of the elementary triplet dispersion. Surprisingly, in the non-adiabatic regime a substantial renormalization of the spin gap only sets in at much larger couplings than those proposed for CuGeO 3 . The ground-state magnetic correlations are found to be hardly affected by the spin-phonon coupling, but dominated by the frustrating magnetic interaction in the parameter regime relevant for CuGeO 3 .

arXiv:cond-mat/9907266•Europhysics Letters (EPL)•Oct 1, 2001•8 citations

Magnetic Structure and NMR signal of Spin Peierls Solitons

D. Foerster, Yann Meurdesoif, B. Malet

We compute the magnetic profile of spin Peierls solitons in a simple Heisenberg model with magneto elastic couplings, using independently the DMRG method and the Hartree Fock approximation. Our results agree qualitatively with published NMR data provided we average over the spin profiles. We conclude that he dynamics of the spin plus lattice system must be included in a more detailed theory of the spin Peierls transition in CuGeO.

arXiv:cond-mat/9802245•Feb 23, 1998•0 citations

Lattice dynamical effects on the peierls transition in one-dimensional metals and spin chains

Holger Fehske, Michael Holicki, Alexander Weiße

arXiv:cond-mat/0004426•Advances in Solid State Physics•Oct 28, 2007•21 citations

Spin Excitation Assisted by Non-Softening Phonon for Spin-Peierls Model

Takanori Sugimoto, Shigetoshi Sota, Takami Tohyama

We study spin dynamics of a spin-Peierls chain with nearest-neighbor and next-nearest-neighbor Heisenberg spin exchange interactions together with a gapped and dispersionless phonon. The dynamical spin correlation function and phonon excitation spectrum are calculated at zero temperature by using dynamical density-matrix renormalization-group method. We find a new spin excitation assisted by non-softening phonon. The excitation is located above phonon in energy and shows a dispersive feature with strong intensity near the momentum $π$. The phonon excitation spectrum is also influenced by the spin-phonon interaction. We discuss the possibility of observing the spin-phonon coupled features in inorganic spin-Peierls compound CuGeO$_3$.

arXiv:1109.2410•Journal of the Physical Society of Japan•Feb 14, 2012•4 citations
We report results from a systematic strong-coupling expansion of a spin-½ Heisenberg chain coupled to Einstein phonons and a frustrating next-nearest-neighbor spin interaction. It is not obvious which interaction dominates in the regime of small coupling constants. In the non-adiabatic regime (ℏΩ ≈ J ) this model is used to describe the zero-temperature properties of CuGeO 3 . The linked cluster expansion allows the determination of observables in the thermodynamic limit preserving the full lattice dynamics without a truncation of the phononic Hilbert space. We show that the spin-phonon coupling leads to a renormalization of the elementary triplet dispersion. Surprisingly, in the non-adiabatic regime a substantial renormalization of the spin gap only sets in at much larger couplings than those proposed for CuGeO 3 . The ground-state magnetic correlations are found to be hardly affected by the spin-phonon coupling, but dominated by the frustrating magnetic interaction in the parameter regime relevant for CuGeO 3 .
We study spin dynamics of a spin-Peierls chain with nearest-neighbor and next-nearest-neighbor Heisenberg spin exchange interactions together with a gapped and dispersionless phonon. The dynamical spin correlation function and phonon excitation spectrum are calculated at zero temperature by using dynamical density-matrix renormalization-group method. We find a new spin excitation assisted by non-softening phonon. The excitation is located above phonon in energy and shows a dispersive feature with strong intensity near the momentum πππ. The phonon excitation spectrum is also influenced by the spin-phonon interaction. We discuss the possibility of observing the spin-phonon coupled features in inorganic spin-Peierls compound CuGeO3_33​.