Luttinger liquid physics in the spin ladder material CuBr 4 (C 5 H 12 N) 2 | Zendy

Klanjšek M. | Zendy; Mayaffre H. | Zendy; Berthier C. | Zendy; Horvatić M. | Zendy; Chiari B. | Zendy; Piovesana O. | Zendy; Bouillot P. | Zendy; Kollath C. | Zendy; Orignac E. | Zendy; Citro R. | Zendy; Giamarchi T. | Zendy

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Luttinger liquid physics in the spin ladder material CuBr 4 (C 5 H 12 N) 2

Author(s) -

Klanjšek M.,

Mayaffre H.,

Berthier C.,

Horvatić M.,

Chiari B.,

Piovesana O.,

Bouillot P.,

Kollath C.,

Orignac E.,

Citro R.,

Giamarchi T.

Publication year - 2010

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.200983048

Subject(s) - condensed matter physics , antiferromagnetism , luttinger liquid , physics , gapless playback , quantum spin liquid , spin (aerodynamics) , critical field , phase transition , magnetic field , lattice (music) , quantum , superconductivity , spin polarization , quantum mechanics , electron , thermodynamics , acoustics

We present a 14 N nuclear magnetic resonance study of a single crystal of CuBr 4 (C 5 H 12 N) 2 consisting of weakly coupled spin‐1/2 Heisenberg antiferromagnetic ladders. When placed in a magnetic field, such a ladder is theoretically predicted to exhibit a quantum critical Luttinger liquid (LL) behaviour in the gapless phase, i.e. between the two critical fields. Treating ladders as LLs and interaction between them as a perturbation, we are indeed able to fully account for (i) the spin dynamics accessed by measuring the spin–lattice relaxation rate $T_1^{ - 1}$ , and for (ii) the phase transition to a 3D ordered phase occurring below 110 mK due to the weak interladder coupling.

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