Paul Malinowski

What controls the superconducting dome of electron-doped FeSe?

Paul Malinowski, Chad J. Mowers, Yaoju Tarn, Darrell G. Schlom et autres

Superconducting domes are conspicuous features of the phase diagrams of most unconventional and high-temperature superconductors. The superconducting transition temperature ( T c ) of FeSe can be dramatically enhanced with electron doping, but unlike all other high-temperature and unconventional superconductors, its full …

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Interaction-driven flat band and charge order in Fe 5 GeTe 2

Qiang Gao, Gabriele Berruto, Khanh Duy Nguyen, Chaowei Hu et autres

Flat electronic bands enable fascinating emergent phenomena such as superconductivity and charge orders. A prevailing approach to realizing flat bands is to engineer lattice geometric constraints in twisted or kagome-like materials. An alternative approach is to utilize purely electronic-interaction-driven flat bands, yet …

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What controls the superconducting dome of electron-doped FeSe?

Paul Malinowski, Chad J. Mowers, Yaoju Tarn, Darrell G. Schlom et autres

Superconducting domes are conspicuous features of the phase diagrams of most unconventional and high-temperature superconductors. The superconducting transition temperature ($T_{c}$) of FeSe can be dramatically enhanced with electron doping, but unlike all other high-temperature and unconventional superconductors, its full phase diagram and …

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Dynamical screening and plasmonic replica bands in SrVO 3

Chad J. Mowers, Paul Malinowski, D.-G. Popescu, J. Dai et autres

SrVO 3 has long been considered a prototype for studying electronic correlations due to its simple electronic structure and coherent t 2 g quasiparticle band. However, the origin of the incoherent satellite at 1.5 eV binding energy seen in photoemission remains enigmatic, …

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Dichotomy of flat bands in the van der Waals ferromagnet Fe 5 GeTe 2

Han Wu, J. C. A. Huang, Chaowei Hu, Lei Chen et autres

Quantum materials with bands of narrow bandwidth near the Fermi level represent a promising platform for exploring a diverse range of fascinating physical phenomena, as the high density of states within the small energy window often enables the emergence of many-body physics. …

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Synthesis and Electronic Structure of the Fractionally Occupied Double Perovskite EuTa 2 O 6 with Ordered Europium Vacancies

Tobias Schwaigert, Ali Barooni, Benjamin Gregory, Paul Malinowski et autres

Abstract 2D electronic states underline a wide range of exotic phenomena and provide potential for electronic devices. The ability to create and control these states often requires physical thinning or highly perfect interfaces. In this work, the “fractional double perovskite” A Ta …

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Caught in the Act of Substitution: Interadsorbate Effects on an Atomically Precise Fe/Co/Se Nanocluster

Jonathan A. Kephart, Daniel Y Zhou, Jason W. Sandwisch, Nathalia Cajiao et autres

High Resolution Image Download MS PowerPoint Slide Directing groups guide substitution patterns in organic synthetic schemes, but little is known about pathways to control reactivity patterns, such as regioselectivity, in complex inorganic systems such as bioinorganic cofactors or extended surfaces. Interadsorbate effects …

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Continuously tunable uniaxial strain control of van der Waals heterostructure devices

Zhaoyu Liu, Xuetao Ma, John Cenker, Jiaqi Cai et autres

Uniaxial strain has been widely used as a powerful tool for investigating and controlling the properties of quantum materials. However, existing strain techniques have so far mostly been limited to use with bulk crystals. Although recent progress has been made in extending …

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Reversible non-volatile electronic switching in a near-room-temperature van der Waals ferromagnet

Han Wu, Lei Chen, Paul Malinowski, Bo Gyu Jang et autres

Abstract Non-volatile phase-change memory devices utilize local heating to toggle between crystalline and amorphous states with distinct electrical properties. Expanding on this kind of switching to two topologically distinct phases requires controlled non-volatile switching between two crystalline phases with distinct symmetries. Here, …

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Revealing Fermi surface evolution and Berry curvature in an ideal type-II Weyl semimetal

Qianni Jiang, Johanna C. Palmstrom, John Singleton, Shalinee Chikara et autres

Abstract In type-II Weyl semimetals (WSMs), the tilting of the Weyl cones leads to the coexistence of electron and hole pockets that touch at the Weyl nodes. These electrons and holes experience the Berry curvature generated by the Weyl nodes, leading to …

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Strain-switchable field-induced superconductivity

Joshua J. Sanchez, G. Fabbris, Yongseong Choi, Jonathan M. DeStefano et autres

Field-induced superconductivity is a rare phenomenon where an applied magnetic field enhances or induces superconductivity. Here, we use applied stress as a control switch between a field-tunable superconducting state and a robust non–field-tunable state. This marks the first demonstration of a strain-tunable …

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Reversible Non-Volatile Electronic Switching in a Near Room Temperature van der Waals Ferromagnet

Han Wu, Lei Chen, Paul Malinowski, Jianwei Huang et autres

The ability to reversibly toggle between two distinct states in a non-volatile method is important for information storage applications. Such devices have been realized for phase-change materials, which utilizes local heating methods to toggle between a crystalline and an amorphous state with …