69 citations · 69 across the 1 of their papers we have counts for
2 papers
cond-mat.str-el1997★ 69 cited
Spin Gap in a Doped Kondo Chain
Arnold E. Sikkema, Ian Affleck, Steven R. White
We show that the Kondo chain away from half-filling has a spin gap upon the introduction of an additional direct Heisenberg coupling between localized spins. This is understood in…
cond-mat1995
Phase Transitions in the One-Dimensional Pair-Hopping Model: a Renormalization Group Study
Arnold Sikkema, Ian Affleck
The phase diagram of a one-dimensional tight-binding model with a pair-hopping term (amplitude V) has been the subject of some controvery. Using two-loop renormalization group equa…