Fractionalized Excitations Revealed by Entanglement Entropy.

Autor:	Hu WJ; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.; Department of Physics and Astronomy & Rice Center for Quantum Materials, Rice University, Houston, Texas 77005, USA., Zhang Y; International Center for Quantum Materials, Peking University, Beijing, 100871, China., Nevidomskyy AH; Department of Physics and Astronomy & Rice Center for Quantum Materials, Rice University, Houston, Texas 77005, USA., Dagotto E; Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA.; Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA., Si Q; Department of Physics and Astronomy & Rice Center for Quantum Materials, Rice University, Houston, Texas 77005, USA., Lai HH; Department of Physics and Astronomy & Rice Center for Quantum Materials, Rice University, Houston, Texas 77005, USA.
Jazyk:	angličtina
Zdroj:	Physical review letters [Phys Rev Lett] 2020 Jun 12; Vol. 124 (23), pp. 237201.
DOI:	10.1103/PhysRevLett.124.237201
Abstrakt:	Fractionalized excitations develop in many unusual many-body states such as quantum spin liquids, disordered phases that cannot be described using any local order parameter. Because these exotic excitations correspond to emergent degrees of freedom, how to probe them and establish their existence is a long-standing challenge. We present a general procedure to reveal the fractionalized excitations using real-space entanglement entropy in critical spin liquids that are particularly relevant to experiments. Moreover, we show how to use the entanglement entropy to construct the corresponding spinon Fermi surface. Our work defines a new pathway to establish and characterize exotic excitations in novel quantum phases of matter.
Databáze:	MEDLINE
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