71 citations · 208 across the 8 of their papers we have counts for
10 papers
Coulombian Disorder in Periodic Systems
E. Orignac, A. Rosso, R. Chitra +1
We study the effect of unscreened charged impurities on periodic systems. We show that the long wavelength component of the disorder becomes long ranged and dominates static correl…
Atom-molecule coherence in a one-dimensional system
R. Citro, E. Orignac
We study a model of one-dimensional fermionic atoms that can bind in pairs to form bosonic molecules. We show that at low energy, a coherence develops between the molecule and ferm…
Adiabatic-antiadiabatic crossover in a spin-Peierls chain
R. Citro, E. Orignac, T. Giamarchi
We consider an XXZ spin-1/2 chain coupled to optical phonons with non-zero frequency . In the adiabatic limit (small ), the chain is expected to spontaneously dimerize an…
Magnetostriction in an array of spin chains under magnetic field
E. Orignac, R. Citro
We consider an array of XX spin-1/2 chains coupled to acoustic phonons and placed in a magnetic field. Treating the phonons in the mean field approximation, we show that this syste…
Mean Field theory of the spin-Peierls transition
E. Orignac, R. Chitra
We revisit the problem of the spin-Peierls instability in a one dimensional spin-1/2 chain coupled to phonons. The phonons are treated within the mean field approximation. We use b…
Quantitative expression of the spin gap via bosonization for a dimerized spin-1/2 chain
Edmond Orignac
Using results on the mass gap in the sine-Gordon model combined with the exact amplitudes in the bosonized representation of the Heisenberg spin-1/2 chain and one-loop renormalizat…