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5 papers · 2 filters
A theory of Topological Kondo Insulators
Maxim Dzero, Kai Sun, Piers Coleman +1
We examine how the properties of the Kondo insulators change when the symmetry of the underlying crystal field multiplets is taken into account. We employ the Anderson lattice mode…
Topological Phase Transitions for Interacting Finite Systems
Christopher N. Varney, Kai Sun, Marcos Rigol +1
In this paper, we investigate signatures of topological phase transitions in interacting systems. We show that the key signature is the existence of a topologically protected level…
Probing a topological quantum critical point in semiconductor-superconductor heterostructures
Sumanta Tewari, J. D. Sau, V. W. Scarola +2
Quantum ground states on the non-trivial side of a topological quantum critical point (TQCP) have unique properties that make them attractive candidates for quantum information app…
Kaleidoscope of exotic quantum phases in a frustrated XY model
Christopher N. Varney, Kai Sun, Victor Galitski +1
The existence of quantum spin liquids was first conjectured by Pomeranchuk some 70 years ago, who argued that frustration in simple antiferromagnetic theories could result in a Fer…
Fractional quantum Hall effect in the absence of Landau levels
D. N. Sheng, Zheng-Cheng Gu, Kai Sun +1
It has been well-known that topological phenomena with fractional excitations, i.e., the fractional quantum Hall effect (FQHE) \cite{Tsui1982} will emerge when electrons move in La…