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1. 연사: 지성대 박사 (MPK)
The Kitaev quantum spin liquid (QSL) model has fascinated condensed matter physicists for a decade because they are exactly solvable, provide a variety of QSL phases, and are relevant for transition metal compounds such as irridates and ruthenates. This model implements the exchange frustration by bond-dependent Ising-like spin interaction on the ideal two-dimensional honeycomb lattice resulting in an exactly solvable topological QSL ground state and fractional spin excitations represented by noble Majorana fermions. In the past decade, experimental realization of the Kitaev QSL model and direct observation of Majorana quasiparticles have been eagerly pursued and now it becomes challenging to explore exotic quantum phases due to additional perturbative spin interactions appearing in real materials.