Pressure-tuning strongly correlated unconventional superconductors and frustrated metallic systems

New quantum states of condensed matter are a fascinating research area. Unconventional phases, such as unconventional superconductivity and non-Fermi liquid phases, are typically observed in regions of competing energy scales, e.g., between the Kondo and RKKY interactions in f-electron systems. In these regions, only small changes of an appropriate external control parameter, such as pressure, can change the properties of a material fundamentally. In addition to the Kondo and RKKY interactions, magnetic frustration between the local f-moments can give rise to strong quantum fluctuations, which may lead to the observation of novel unconventional phases, such as unconventional superconductivity.

In the present project, we will deploy electrical transport, thermodynamic and magnetic probes and, in collaboration with external groups, magnetic resonance and scattering techniques at very low temperatures, in high magnetic fields and under high pressures in order to study quantum criticality in unconventional superconductors and frustrated metallic systems.

From the successful candidate, we expect a solid background in solid-state physics and the motivation to advance our existing experimental capabilities.

References

Y. S. Li, M. Garst, J. Schmalian, S. Ghosh, N. Kikugawa, D. A. Sokolov, C. W. Hicks, F. Jerzembeck, M. S. Ikeda, Z. H. Hu, B. J. Ramshaw, A. W. Rost, M. Nicklas, and A. P. Mackenzie
Elastocaloric determination of the phase diagram of Sr2RuO4
Nature 607, 276 (2022)
G. A. Lombardi, K. Mydeen, R. Gumeniuk, A. Leithe-Jasper, W. Schnelle, R. D. Dos Reis, and M. Nicklas
Pressure Tuning of Superconductivity of LaPt4Ge12 and PrPt4Ge12 Single Crystals
Materials 15, 2743 (2022)
Y. J. Zhang, Z. Y. Nie, R. Li, Y. C. Li, D. L. Yang, B. Shen, Y. Chen, F. Du, S. S. Luo, H. Su, R. Shi, S. Y. Wang, M. Nicklas, F. Steglich, M. Smidman, and H. Q. Yuan
Suppression of ferromagnetism and influence of disorder in silicon-substituted CeRh6Ge4
Phys. Rev. B 106, 054409 (2022)
B. Shen, Y.J. Zhang, Y. Komijani, M. Nicklas, R. Borth, A. Wang, Y. Chen, Z.Y. Nie, R. Li, X. Lu, H. Lee, M. Smidman, F. Steglich, P. Coleman, and H.Q. Yuan
Strange-Metal Behaviour in a Pure Ferromagnetic Kondo Lattice
Nature 579, 51 (2020)
M.O. Ajeesh, K. Weber, C. Geibel, and M. Nicklas
Putative Quantum Critical Point in the Itinerant Magnet ZrFe4Si2 with a Frustrated Quasi-One-Dimensional Structure
Phys. Rev. B 102, 184403 (2020)

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