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Strong Coupling Theory of Superconductivity and Ferroelectric Quantum Criticality in metallic SrTiO
Sudip Kumar Saha, Maria N. Gastiasoro, Jonathan Ruhman +1
Superconductivity in doped SrTiO has remained an enduring mystery for over 50 years. The material's status as a ``quantum" ferroelectric metal, characterized by a soft polar mo…
The Smearing of Quasi-Particles: Signatures in the Entanglement Entropy of Excited Many-Particle Systems
Jagannath Sutradhar, Jonathan Ruhman, Avraham Klein +2
The entanglement spectrum serves as a powerful tool for probing the structure and dynamics of quantum many-body systems, revealing key information about symmetry, topology, and exc…
Flat band physics in the charge-density wave state of -TaS
Amir Dalal, Jonathan Ruhman, Jörn W. F. Venderbos
1-TaS is the only insulating transition-metal dichalcogenide (TMD) with an odd number of electrons per unit cell. This insulating state is non-magnetic, making it a potentia…
The transition-metal-dichalcogenide family as a superconductor tuned by charge density wave strength
Shahar Simon, Hennadii Yerzhakov, Sajilesh K. P. +6
Metallic transition metal dichalcogenides (TMDs), consisting of H-NbSe, H-NbS, H-TaSe and H-TaS, remain superconducting down to a thickness of a single layer. In th…
Singlet, triplet, and mixed all-to-all pairing states emerging from incoherent fermions
Jagannath Sutradhar, Jonathan Ruhman, Avraham Klein
The electron-electron and electron-phonon coupling in complex materials can be more complicated than simple density-density interactions, involving intertwined dynamics of spin, ch…