Emergent Magnetic Order and Spin Dynamics in a Ytterbium-Based Triangular-Lattice Delafossite

ORAL

Abstract

We have synthesized a new member of the AYbX₂ (A = monovalent cation; X = O, S, Se, Te) delafossite family and investigated its magnetic properties using magnetization and heat-capacity measurements. At zero magnetic field, the system shows no evidence of long-range magnetic order down to 20 mK. When a magnetic field is applied along the ab-plane, multiple field-induced magnetic phases emerge above ~2.5 T, followed by full spin polarization near 17 T. The material exhibits stronger exchange interactions compared to other known Yb-based delafossites. We will discuss the magnetic phase transitions and the evolution of the spin dynamics under applied fields. The heat-capacity results suggest the presence of a possible quantum spin liquid phase at low temperatures and low magnetic fields, highlighting this system as a promising platform for exploring quantum spin liquid physics.

*This work is supported by the U.S. Department of Energy – Office of Science, Basic Energy Sciences (Grant No. DE-SC0022986), under the project ”Seeking Quasiparticles from Low-Energy Spin Dynamics.”Part of this work was conducted at the National High Magnetic Field Laboratory, supported by the National Science Foundation (Cooperative Agreement No. DMR-2128556) and the State of Florida.

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Presenters

  • Mohan B Neupane

    • Purdue University- West Lafayette

Authors

  • Mohan B Neupane

    • Purdue University- West Lafayette

  • Bishnu Prasad Belbase

    • Purdue University

  • Arjun Unnikrishnan

    • Purdue University

  • Piyush D Chhallare

    • Purdue University

  • Eun Sang Choi

    • National High Magnetic Field Lab
    • National High Magnetic Field Laboratory, Tallahassee, Florida
    • National High Magnetic Field Laboratory
    • National High Magnetic Field Laboratory, Florida
    • NHML

  • Arnab Banerjee

    • Purdue University and Quantum Science Center
    • Purdue University