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Article overview
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The spin-Peierls chain revisited | Georg Hager
; Alexander Weisse
; Gerhard Wellein
; Eric Jeckelmann
; Holger Fehske
; | Date: |
14 Jun 2006 | Subject: | Strongly Correlated Electrons; Statistical Mechanics | Abstract: | We extend previous analytical studies of the ground-state phase diagram of a one-dimensional Heisenberg spin chain coupled to optical phonons, which for increasing spin-lattice coupling undergoes a quantum phase transition from a gap-less to a gaped phase with finite lattice dimerisation. We check the analytical results against established four-block and new two-block density matrix renormalisation group (DMRG) calculations. Different finite-size scaling behaviour of the spin excitation gaps is found in the adiabatic and anti-adiabatic regimes. | Source: | arXiv, cond-mat/0606360 | Services: | Forum | Review | PDF | Favorites |
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