Field-induced tomonaga-luttinger liquid phase two-leg spin 1/2 ladder with strong leg interactions

TY - JOUR

T1 - Field-induced tomonaga-luttinger liquid phase two-leg spin 1/2 ladder with strong leg interactions

AU - Hong...[et al.], Tao

AU - Kim, Y. H.

AU - Hotta, C.

AU - Lefmann, Kim

PY - 2010/9/23

Y1 - 2010/9/23

N2 - We study the magnetic-field-induced quantum phase transition from a gapped quantum phase that has no magnetic long-range order into a gapless phase in the spin-1/2 ladder compound bis(2,3-dimethylpyridinium) tetrabromocuprate (DIMPY). At temperatures below about 1a K, the specific heat in the gapless phase attains an asymptotic linear temperature dependence, characteristic of a Tomonaga-Luttinger liquid. Inelastic neutron scattering and the specific heat measurements in both phases are in good agreement with theoretical calculations, demonstrating that DIMPY is the first model material for an S=1/2 two-leg spin ladder in the strong-leg regime.

AB - We study the magnetic-field-induced quantum phase transition from a gapped quantum phase that has no magnetic long-range order into a gapless phase in the spin-1/2 ladder compound bis(2,3-dimethylpyridinium) tetrabromocuprate (DIMPY). At temperatures below about 1a K, the specific heat in the gapless phase attains an asymptotic linear temperature dependence, characteristic of a Tomonaga-Luttinger liquid. Inelastic neutron scattering and the specific heat measurements in both phases are in good agreement with theoretical calculations, demonstrating that DIMPY is the first model material for an S=1/2 two-leg spin ladder in the strong-leg regime.

U2 - 10.1103/PhysRevLett.105.137207

DO - 10.1103/PhysRevLett.105.137207

M3 - Journal article

C2 - 21230808

SN - 0031-9007

VL - 105

SP - 137207

JO - Physical Review Letters

JF - Physical Review Letters

IS - 13

ER -