Abstract
The recently discovered tetragonal Sm2Ru3Ge5 provides an ideal avenue to study the interplay between the charge-density-wave (CDW) transition and ferromagnetic (FM) order which appear at TCDW = 175 K and Tm = 8 K, respectively. By performing high-pressure structure and electrical transport measurements on the Sc2Fe3Si5-type Sm2Ru3Ge5 (space group: P4/mnc), it is found that the TCDW is gradually suppressed to low temperature while the Tm changes negligibly with the increase of pressure, likely suggesting a weak link between the two states. Besides, a likely rare example of temperature-induced Lifshitz transition is also observed around 93 K, which is gradually suppressed to low temperature upon increasing pressure and eventually becomes invisible at ∼ 8 GPa. Hall resistivity measurements and first-principles calculations provide evidence for the Lifshitz transition. The work covers a topic of high interest in complex quantum materials showing the interplay of ferromagnetism, charge density wave and lattice instability.
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