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Deepak John Mukkattukavil on Muck Rack

Deepak John Mukkattukavil

As seen in: Nature, Science Magazine, Physical Review B
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Articles

Topological metal-insulator transition within the ferromagnetic state - Nature Communications

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By Ola Forslund, Chin Shen Ong, Moritz M. Hirschmann, Nicolas Gauthier, Hiroshi Uchiyama, Christian Tzschaschel, Daniel G. Mazzone, Romain Sibille, Antonio Dos Santos, Masafumi Horio, Elisabetta Nocerino, Nami Matsubara, Deepak John Mukkattukavil, Konstantinos I. Papadopoulos, Kazuya Kamazawa, Kazuhiko Ikeuchi, Hidenori Takagi, Masahiko Isobe, Jun Sugiyama, Johan Chang, Yasmine Sassa, Olle Eriksson, Martin Månsson
| Nature Verified
Abstract A major challenge in condensed matter physics is integrating topological phenomena with correlated electron physics to leverage both types of states for next-generation quantum devices. Metal-insulator transitions are central to bridging these two domains while simultaneously serving as on-off switches for electronic states. Here, we demonstrate how the prototypical material of K2Cr8O16 undergoes a ferromagnetic metal-insulator transition accompanied by a change in band topology.
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Magnetic circular dichroism in the $dd$ excitation in the van der Waals magnet ${\mathrm{CrI}}_{3}$ probed by resonant inelastic x-ray scattering

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By Anirudha Ghosh, Max IV Laboratory, H. Johan M. Jönsson, Deepak John Mukkattukavil
| Physical Review B
Abstract We report on a combined experimental and theoretical study on CrI3 single crystals by employing the polarization dependence of resonant inelastic x-ray scattering (RIXS). Our investigations reveal multiple Cr 3d orbital splitting (dd excitations) as well as magnetic dichroism (MD) in the RIXS spectra. The dd excitation energies are similar on the two sides of the ferromagnetic transition temperature, TC∼61 K, although MD in RIXS is predominant at 0.4 T magnetic field below TC.
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Charge order lock-in by electron-phonon coupling in La1.675Eu0.2Sr0.125CuO4

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By Qisi Wang, Masafumi Horio, Karin von Arx, Deepak John Mukkattukavil
| Science Magazine Verified
Abstract Charge order is universal to all hole-doped cuprates. Yet, the driving interactions remain an unsolved problem. Electron-electron interaction is widely believed to be essential, whereas the role of electron-phonon interaction is unclear. We report an ultrahigh-resolution resonant inelastic x-ray scattering (RIXS) study of the in-plane bond-stretching phonon mode in stripe-ordered cuprate La1.675Eu0.2Sr0.125CuO4.
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