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cond-mat.mes-hall2004★ 21 cited
What are spin currents in Heisenberg magnets?
Florian Schuetz, Peter Kopietz, Marcus Kollar
We discuss the proper definition of the spin current operator in Heisenberg magnets subject to inhomogeneous magnetic fields. We argue that only the component of the naive "current…
cond-mat.mes-hall2001
Tunneling gap of laterally separated quantum Hall states
Marcus Kollar, Subir Sachdev
We use a method of matched asymptotics to determine the energy gap of two counter-propagating, strongly interacting, quantum Hall edge states. The microscopic edge state dispersion…