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Nodal band-off-diagonal superconductivity in twisted graphene superlattices
Maine Christos, Subir Sachdev, Mathias S. Scheurer
The superconducting state and mechanism are among the least understood phenomena in twisted graphene systems. For instance, recent tunneling experiments indicate a transition betwe…
Superconductivity of non-Fermi liquids described by Sachdev-Ye-Kitaev models
Chenyuan Li, Subir Sachdev, Darshan G. Joshi
We investigate models of electrons in the Sachdev-Ye-Kitaev class with random and all-to-all electron hopping, electron spin exchange, and Cooper-pair hopping. An attractive on-sit…
Evidence of zero point fluctuation of vortices in a very weakly pinned a-MoGe thin film
Surajit Dutta, Indranil Roy, John Jesudasan +2
In a Type II superconductor, the vortex core behaves like a normal metal. Consequently, the single-particle density of states in the vortex core of a conventional Type II supercond…
Pairing in graphene-based moiré superlattices
Mathias S. Scheurer, Rhine Samajdar
We present a systematic classification and analysis of possible pairing instabilities in graphene-based moiré superlattices. Motivated by recent experiments on twisted double-bilay…
Magnetic-field Induced Pair Density Wave State in the Cuprate Vortex Halo
Stephen D. Edkins, Andrey Kostin, Kazuhiro Fujita +8
When very high magnetic fields suppress the superconductivity in underdoped cuprates, an exceptional new electronic phase appears. It supports remarkable and unexplained quantum os…
Magnetic-field Induced Interconversion of Cooper Pairs and Density Wave States within Cuprate Composite Order
M. H. Hamidian, S. D. Edkins, K. Fujita +8
Recent studies establish that the cuprate pseudogap phase is susceptible at low temperatures to forming not only a -symmetry superconducting (SC) state, but also a -symmetry…