Publications by authors named "R Harsh"
Kondo lattices are ideal testbeds for the exploration of heavy-fermion quantum phases of matter. While our understanding of Kondo lattices has traditionally relied on complex bulk f-electron systems, transition metal dichalcogenide heterobilayers have recently emerged as simple, accessible and tunable 2D Kondo lattice platforms where, however, their ground state remains to be established. Here we present evidence of a coherent ground state in the 1T/1H-TaSe heterobilayer by means of scanning tunneling microscopy/spectroscopy at 340 mK.
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- - In April 2021, during India's COVID-19 crisis, the UDHAVI helpline was launched to support the community by offering medical advice, counseling, and logistical assistance
- - A study analyzing 677 calls to the helpline between mid-May and mid-June 2021 showed that the majority were for medical advice (56%), with significant outreach by volunteers delivering essential items like home care kits and oxygen concentrators
- - The findings emphasize the importance of effective communication and resource mobilization in public health emergencies, proposing a partnership model for better emergency response in the future.
Article Synopsis
- * Researchers found a soft collective mode in single-layer NbSe, evidenced by a unique resonance in tunneling spectra, which connects to changes in the superconducting gap and diminishes with increased temperature and magnetic fields.
- * The observations suggest that these fluctuations relate to a collective Leggett mode, indicating significant electronic correlations in 2D materials like transition metal dichalcogenides, pointing towards potential for novel superconducting properties in these materials.
We identify and manipulate commonly occurring defects in black phosphorus, combining scanning tunneling microscopy experiments with density functional theory calculations. A ubiquitous defect, imaged at negative bias as a bright dumbbell extending over several nanometers, is shown to arise from a substitutional Sn impurity in the second sublayer. Another frequently observed defect type is identified as arising from an interstitial Sn atom; this defect can be switched to a more stable configuration consisting of a Sn substitutional defect + P adatom, by application of an electrical pulse via the STM tip.
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- Transition metal dichalcogenides (TMDs) provide a platform to create 2D materials with adjustable properties, allowing for exploration of new structural and electronic transitions.
- This study focuses on the electronic ground state evolution of a monolayer Nb1-xMoxSe2 alloy using low-temperature scanning tunneling microscopy, examining its transition from metal to semiconductor as Mo content varies.
- Findings reveal significant effects of Mo doping on the electronic structure, including impacts on the density of states and superconductivity, with important implications for future 2D materials design.