11 papers
Instability of Nagaoka State and Quantum Phase Transition via Kinetic Frustration Control
Prakash Sharma, Yang Peng, Donna N. Sheng +2
We investigate the Nagaoka-Thouless (NT) ferromagnetic instability in the strongly interacting - Hubbard model by continuously breaking particle-hole symmetry on a tunable s…
Melting temperature shifts from quantum fluctuations in generalized Wigner crystals
Aman Kumar, Sogoud Sherif, Veit Elser +1
It is generally believed that quantum fluctuations collaborate with thermal fluctuations, effectively reducing transition temperatures (e.g. for melting of charge order). We show t…
Transport and Temperature 1: Exact spectrum and resistivity for the one-dimensional infinite- Hubbard model
Shuo Liu, Yuhao Ma, Hitesh J. Changlani +2
Understanding charge transport in strongly correlated systems remains a central challenge in condensed matter physics, particularly in light of the ubiquitous linear-in- resisti…
Intrinsic quantum disorder in Yb2Ti2O7 and the quantum S=1/2 pyrochlore phase diagram
Shang-Shun Zhang, Anish Bhardwaj, S. M. Koohpayeh +4
We present an experimental and theoretical study of the anisotropic pyrochlore phase diagram. Inelastic field-dependent neutron scattering on YbTiO shows intrinsic broa…
Haerter-Shastry kinetic magnetism and metallicity in the triangular Hubbard model
Sogoud Sherif, Prakash Sharma, Aman Kumar +1
The fermionic Hubbard model, when combined with the ingredient of frustration, associated with the breaking of particle-hole symmetry, harbors a rich phase diagram. Aspects of theo…
Origin and stability of generalized Wigner crystallinity in triangular moiré systems
Aman Kumar, Cyprian Lewandowski, Hitesh J. Changlani
Generalized Wigner crystals (GWC) on triangular moiré superlattices, formed from stacking two layers of transition metal chalcogenides, have been observed at multiple fractional f…