671 citations · 6.5k across the 160 of their papers we have counts for
4 papers · 2 filters
An Impurity Driven Phase Transition in the Antiferromagnetic Spin-1 Chain
R. A. Hyman, Kun Yang
Using an asymptotically exact real space renormalization procedure, we find that the Heisenberg antiferromagnetic spin-1 chain undergoes an impurity driven second order phase trans…
Landau Level Mixing and Levitation of Extended States in Two Dimensions
F. D. M. Haldane, Kun Yang
We study the effects of mixing of different Landau levels on the energies of one-body states, in the presence of a strong uniform magnetic field and a random potential in two dimen…
Spontaneous Interlayer Coherence in Double-Layer Quantum Hall Systems: Symmetry Breaking Interactions, In-Plane Fields and Phase Solitons
Kun Yang, K. Moon, Lotfi Belkhir +5
At strong magnetic fields double-layer two-dimensional-electron-gas systems can form an unusual broken symmetry state with spontaneous inter-layer phase coherence. The system can b…
Many skyrmion wave functions and skyrmion statistics in quantum Hall ferromagnets
Kun Yang, S. L. Sondhi
We determine the charge and statistical angle of skyrmions in quantum Hall ferromagnets by performing Berry phase calculations based on the microscopic variational wave functions f…