Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Field-Tunable Quantum Disordered Ground State in the Triangular-Lattice Antiferromagnet NaYbO2

Published

Author(s)

Mitchell M. Bordelon, Eric Kenney, Chunxiao Liu, Tom Hogan, Lorenzo Posthuma, Marzieh Kavand, Yuangqi Lyu, Mark Sherwin, Nicholas Butch, Craig Brown, M. J. Graf, Leon Balents, Stephen D. Wilson

Abstract

One of the simplest routes to pursuing magnets with strong quantum fluctuations that quench conventional order is via decorating a triangular lattice with antiferromagnetically coupled S=1/2 moments. As disorder and anisotropies inherent in materials render experimental realizations of such a lattice exceedingly rare, alternative models using spin-orbit entangled Jeff=1/2 ions have also been proposed. Native disorder in candidate materials hosting a triangular lattice of Jeff=1/2 moments has however remained an obstacle in assessing this alternate approach and motivates the identification of new, structurally perfect variants. Here we investigate such a compound in NaYbO2, which hosts an ideal triangular lattice Jeff=1/2 moments showing no signatures of conventional magnetic order down to 50 mK. Magnetic field strongly perturbs the resulting quantum disordered ground state and drives the formation interlayer exchange Our data demonstrate that the triangular lattice of Jeff=1/2 moments in NaYbO2 realizes an unconventional, quantum-disordered ground state whose critical phase boundaries are accessible under modest fields.
Citation
Nature Physics
Volume
15

Keywords

antiferromagnet, neutron diffraction, structure, magnetism

Citation

Bordelon, M. , Kenney, E. , Liu, C. , Hogan, T. , Posthuma, L. , Kavand, M. , Lyu, Y. , Sherwin, M. , Butch, N. , Brown, C. , Graf, M. , Balents, L. and Wilson, S. (2019), Field-Tunable Quantum Disordered Ground State in the Triangular-Lattice Antiferromagnet NaYbO<sub>2</sub>, Nature Physics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=927340 (Accessed August 14, 2022)
Created September 30, 2019, Updated October 12, 2021