Abdel-Hafiez: Controlling Quantum Materials with Extreme Conditions
2021-07-13 10:05 - 10:50 (Europe/Berlin) | TUD,
Speaker: Dr. Mahmoud Abdel-Hafiez
Institute of Speaker: Uppsala University, Sweden
Topics:
Physik
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Description:
Abstract:

Understanding the fundamental properties in novelquantum materials and the development of methods to characterize and control their collectivebehavior is a topical area that attracts enormous interest. Quantum materials couples the complex electronic, structural, and magnetic components that are oftencollective and emergent, making them very suitable to manipulate their properties for a range of new electronics. Extreme conditions, particularly very low temperatures associated with large applied pressure and high magnetic fields, have emerged as powerful tools to induce new functionalities in quantum materials and show ways to control their properties. In this talk, I will describe recent experiments performed in our low temperature laboratory that address how extreme conditions can provide new insights into various fundamental problems respond to new exotic states driven by extreme conditions. First, I will discuss the relation between charge density waves and superconductivity in transition-metal dichalcogenides through high pressure [1] and low temperature experiments down to 60 mK [2-4]. Second, Iwill present our experiments on the transport and magnetic properties in oxypnictides [5] and Fe-based materials [6] that led to outstanding results on pressure induced suppression of superconductivity on the verge of magnetic ordering [7]. At the end, I will show how my future planned research fits exactly with the research directions of the ct.qmatexcellence cluster "Complexity and Topology in Quantum Matter" at TU Dresden. Importantly, my research goals will undeniably promote and sustain a much-needed synergy between various theoretical and experimental research directions that involve scientists at the ct.qmat, as well as with national and international collaborators at TU Dresden.

[1] M. Abdel-Hafiez et al.,Sci.Rep.6, 31824(2016)

[2] Y. Kvashnin et al., Phys.Rev.Lett.125, 186401(2020)

[3] A. Majumdar et al., Phys.Rev.Materials 4, 084005(2020)

[4] C. Cho et al., Nat.Commun.12, 3676(2021)

[5] A. Adamski, C. Krellner, and M. Abdel-Hafiez, Phys.Rev.B 96, 100503(R)(2017)

[6] Derrick Van Gennep et al., Phys.Rev.B 101, 235163(2020)

[7] M. Abdel-Hafiez et al., Phys.Rev.B 98, 094504(2018)

Where: Zoom Meeting:

https://tu-dresden.zoom.us/j/85193786651?pwd=[REDACTED] (https://tu-dresden.zoom.us/j/85193786651?pwd=[REDACTED]
Meeting ID: 851 9378 6651
Passcode: [REDACTED]
