TY - JOUR
T1 - Solitary magnetic excitations in the low-carrier density, one-dimensional S = 1/2 antiferromagnet Yb4As3
AU - Köppen, M.
AU - Lang, M.
AU - Helfrich, R.
AU - Steglich, F.
AU - Thalmeier, P.
AU - Schmidt, B.
AU - Wand, B.
AU - Pankert, D.
AU - Benner, H.
AU - Aoki, H.
AU - Ochiai, A.
PY - 1999/1/1
Y1 - 1999/1/1
N2 - We report low-temperature measurements of the specific heat, thermal expansion, and thermal conductivity on the quasi-one-dimensional, effective s = 1/2 Heisenberg antiferromagnet Yb4As3. Distinct field-induced anomalies were found in the above quantities which are well described by the classical sine-Gordon soliton solution for an easy-plane Heisenberg antiferromagnet. Our findings strongly suggest that Yb4As3 represents the first example of an antiferromagnetic S = 1/2 spin-chain system where this type of nonlinear excitation could be identified.
AB - We report low-temperature measurements of the specific heat, thermal expansion, and thermal conductivity on the quasi-one-dimensional, effective s = 1/2 Heisenberg antiferromagnet Yb4As3. Distinct field-induced anomalies were found in the above quantities which are well described by the classical sine-Gordon soliton solution for an easy-plane Heisenberg antiferromagnet. Our findings strongly suggest that Yb4As3 represents the first example of an antiferromagnetic S = 1/2 spin-chain system where this type of nonlinear excitation could be identified.
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U2 - 10.1103/PhysRevLett.82.4548
DO - 10.1103/PhysRevLett.82.4548
M3 - Article
AN - SCOPUS:4244013149
SN - 0031-9007
VL - 82
SP - 4548
EP - 4551
JO - Physical Review Letters
JF - Physical Review Letters
IS - 22
ER -