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Title

Controlling Luttinger Liquid Physics in Spin Ladders under a Magnetic Field

Authors
Klanjšek, M.
Mayaffre, H.
Berthier, C.
Horvatić, M.
Chiari, B.
Piovesana, O.
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Published in Physical Review Letters. 2008, vol. 101, no. 13
Abstract We present a 14N nuclear magnetic resonance study of a single crystal of CuBr4(C5H12N)2 (BPCB) consisting of weakly coupled spin-1/2 Heisenberg antiferromagnetic ladders. Treating ladders in the gapless phase as Luttinger liquids, we are able to fully account for (i) the magnetic field dependence of the nuclear spin-lattice relaxation rate T−11 at 250 mK and for (ii) the phase transition to a 3D ordered phase occurring below 110 mK due to weak interladder exchange coupling. BPCB is thus an excellent model system where the possibility to control Luttinger liquid parameters in a continuous manner is demonstrated and the Luttinger liquid model tested in detail over the whole fermion band.
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KLANJŠEK, M. et al. Controlling Luttinger Liquid Physics in Spin Ladders under a Magnetic Field. In: Physical Review Letters, 2008, vol. 101, n° 13. https://archive-ouverte.unige.ch/unige:36043

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Deposited on : 2014-04-28

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