@article{ISI:000435333100003,
 abstract = {We address the key open problem of a higher-dimensional generalization
of the Sachdev-Ye-Kitaev (SYK) model. We construct a model on a lattice
of SYK dots with nonrandom intersite hopping. The crucial feature of the
resulting band dispersion is the presence of a Lifshitz point where two
bands touch with a tunable power-law divergent density of states (DOS).
For a certain regime of the power-law exponent, we obtain a class of
interaction-dominated non-Fermi-liquid (NFL) states, which exhibits
exciting features such as a zero-temperature scaling symmetry, an
emergent (approximate) time reparameterization invariance, a power-law
entropy-temperature relationship, and a fermion dimension that depends
continuously on the DOS exponent. Notably, we further demonstrate that
these NFL states are fast scramblers with a Lyapunov exponent lambda(L)
proportional to T, although they do not saturate the upper bound of
chaos, rendering them truly unique.},
 article-number = {241106},
 author = {Haldar, Arijit and Banerjee, Sumilan and Shenoy, Vijay B.},
 doi = {10.1103/PhysRevB.97.241106},
 eissn = {2469-9969},
 issn = {2469-9950},
 journal = {PHYSICAL REVIEW B},
 month = {JUN 14},
 number = {24},
 orcid-numbers = {Haldar, Arijit/0000-0003-1962-1707},
 title = {Higher-dimensional Sachdev-Ye-Kitaev non-Fermi liquids at Lifshitz
transitions},
 unique-id = {ISI:000435333100003},
 volume = {97},
 year = {2018}
}