Siddharth Parameswaran: Publications

High-temperature transport and polaron speciation in the anharmonic Holstein model

(2021)

Authors:

Attila Szabó, SA Parameswaran, Sarang Gopalakrishnan

Global Phase Diagram of the Normal State of Twisted Bilayer Graphene

(2021)

Authors:

Glenn Wagner, Yves H Kwan, Nick Bultinck, Steven H Simon, SA Parameswaran

Beyond the Freshman's Dream: Classical fractal spin liquids from matrix cellular automata in three-dimensional lattice models

(2021)

Authors:

Sounak Biswas, Yves H Kwan, SA Parameswaran

One-Dimensional Luttinger Liquids in a Two-Dimensional Moiré Lattice

(2021)

Authors:

Pengjie Wang, Guo Yu, Yves H Kwan, Yanyu Jia, Shiming Lei, Sebastian Klemenz, F Alexandre Cevallos, Ratnadwip Singha, Trithep Devakul, Kenji Watanabe, Takashi Taniguchi, Shivaji L Sondhi, Robert J Cava, Leslie M Schoop, Siddharth A Parameswaran, Sanfeng Wu

Domain wall competition in the Chern insulating regime of twisted bilayer graphene

Physical Review B: Condensed Matter and Materials Physics American Physical Society 104 (2021) 115404

Authors:

Yves H Kwan, Glenn Wagner, Nilotpal Chakraborty, Steven H Simon, Sa Parameswaran

Abstract:

We consider magic-angle twisted bilayer graphene (TBG) at filling $\nu=+3$, where experiments have observed a robust quantized anomalous Hall effect. This has been attributed to the formation of a valley- and spin-polarized Chern insulating ground state that spontaneously breaks time-reversal symmetry, and is stabilized by a hexagonal boron nitride (hBN) substrate. We identify three different types of domain wall, and study their properties and energetic selection mechanisms via theoretical arguments and Hartree-Fock calculations adapted to deal with inhomogeneous moir\'e systems. We comment on the implications of these results for transport and scanning probe experiments.

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