Kagome spin ice and strange metal phases

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• Prof. Philipp Gegenwart, Universität Augsburg
• Tuesday 03 March 2026, 14:15-15:15
• Orange Boardroom, Maxwell Centre, Cavendish Laboratory.

If you have a question about this talk, please contact Suchitra E. Sebastian.

In the talk, I will focus on two members of the ZrNiAl structure type with twisted Kagome magnetic layers. HoAgGe represents the first crystalline realization of Kagome spin ice, evidenced by neutron scattering, and displays striking fractionalized plateau states in magnetic and transport experiments [1-3]. CrNiAs is a kagome metal in which the ferromagnetic order can be continuously suppressed under hydrostatic pressure. Remarkably a broad pressure range over which strange-metal behavior persists beyond the critical pressure is found contrasting with conventional quantum criticality [4].

[1] K. Zhao et al.: Realization of the kagome spin ice state in a frustrated intermetallic compound, Science 367, 1218 (2020).

[2] K. Zhao et al.: Time-reversal-like degeneracies distinguished by the anomalous Hall effect in a metallic kagome ice compound, Nat. Phys. 20, 442 (2024).

[3] K. Zhao et al.: Nonlinear time-reversal symmetry breaking in kagome spin ice HoAgGe, arXiv:2505.22544.

[4] B. Shen et al.: Pressure-induced strange metal phase in a metallic kagome ferromagnet, arXiv:2503.09524.

This talk is part of the ses59 series.

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• Orange Boardroom, Maxwell Centre, Cavendish Laboratory

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