Abstract
Intertwined orders appear when multiple orders are strongly interacting, and kagome metals have emerged as new platforms to explore exotic phases. FeGe has been found to develop a charge density wave (CDW) order within magnetic phase, suggesting an intricate interplay of the lattice, charge, and spin degrees of freedom. Recently, postgrowth annealing has been proposed to tune the CDW order from long-range to complete suppression, offering a tuning knob for the CDW order. Here, by comparing the electronic structures of FeGe subjected to different annealing conditions and distinct CDW properties, we report spectral evolution associated with the lattice and spin degrees of freedom. We find band evolution linked to a spin density wave (SDW) order present in both samples with and without CDW order, and another evolution connected to the lattice distortions that onset with the long-range CDW order and revert with the SDW order. Our results reveal a rare competitive cooperation of the lattice, spin, and charge in FeGe.
| Original language | English |
|---|---|
| Article number | eadt2195 |
| Journal | Science Advances |
| Volume | 11 |
| Issue number | 27 |
| DOIs | |
| Publication status | Published - 4 Jul 2025 |
Funding
Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the US Department of Energy (DOE), Office of Science, Office of Basic Energy Sciences (BES) under contract no. DE-AC02-76SF00515. The ARPES work at Rice University was supported by the Gordon and Betty Moore Foundation's EPiQS Initiative through grant no. GBMF9470 and the Robert A. Welch Foundation grant no. C-2175 (to M.Y.). This research was supported by Sookmyung Women's University Research grant no. 1-2403-2026 (to J.S.O.). The single-crystal synthesis and characterization work at Rice University was supported by the US National Science Foundation DMR-2401084, DMR-2302420, and the Robert A. Welch Foundation grant no. C-1839 (to P.D.). Work at the University of California, Berkeley and Lawrence Berkeley National Laboratory was funded by the US DOE, Office of Science, BES, Materials Sciences and Engineering Division under contract no. DE-AC02-05CH11231 (Quantum Materials Program KC2202) (to R.J.B.). We acknowledge the support from National Science Foundation grants nos. DMR-2324035 and DMR-2324032 (to J.S.O., R.J.B., and M.Y.). M.H. and D.L. acknowledge the support of the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Division of Material Sciences and Engineering, under Contract No. DE-AC02-76SF00515.
All Science Journal Classification (ASJC) codes
- General