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Ritajit Kundu

As seen in: Nature, Physical Review B
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Articles

Quantum interference in a twisted high-Tc SQUID senses emergent interfacial order

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By Amit Basu, Ritajit Kundu, Neha Bhatia Verified, Sakshi Nema, Khushabu S. Agrawal, Abhishek Das, Joydip Sarkar, Amit Shah, Ruta Kulkarni, Digambar A. Jangade, Arijit Kundu, A. Thamizhavel, Mandar M. Deshmukh, Samrat Ash, Tejaswini Gawade
| Nature Verified
Abstract Engineering artificial systems by twisting van der Waals materials provides an excellent platform for exploring emergent quantum phenomena. Recent advances in fabrication enable studies of interfacial superconductivity in twisted cuprates. In our work, we fabricate superconducting quantum interference devices (SQUID) that utilize the twisted interface of Bi2Sr2CaCu2O8+δ, a high-Tc cuprate superconductor.
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Superconducting magic-angle twisted trilayer graphene with competing magnetic order and moiré inhomogeneities - Nature Materials

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By Ayshi Mukherjee, Surat Layek, Subhajit Sinha, Ritajit Kundu, Alisha H. Marchawala, Joydip Sarkar, Heena Agarwal, Sanat K. Ghosh, Kenji Watanabe, Takashi Taniguchi, Abhay N. Pasupathy, Arijit Kundu
| Nature Verified
Abstract The microscopic mechanism of unconventional superconductivity in magic-angle twisted trilayer graphene is poorly understood. We show direct evidence for an in-plane magnetic order competing with the superconducting state motivated by theoretical proposals. We use two complementary electrical transport measurements.
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Josephson junction of minimally twisted bilayer graphene

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By Ritajit Kundu, Arijit Kundu
| Physical Review B
We theoretically investigate the transport properties of a Josephson junction composed of superconductor/minimally twisted bilayer graphene/superconductor structures. In the presence of an out-of-plane electric field, the low-energy physics is best described by a network of domain-wall states. Depending on system parameters, they lead to the emergence of zigzag or pseudo-Landau-level modes with distinct transport characteristics.
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