A. Cook

collaborators

5 papers

cond-mat.mes-hall2018

Topology in the Sierpiński-Hofstadter problem

Marta Brzezińska, Ashley M. Cook, Titus Neupert

Using the Sierpiński carpet and gasket, we investigate whether fractal lattices embedded in two-dimensional space can support topological phases when subjected to a homogeneous ext…

cond-mat.supr-con2018

Three-Dimensional Fermi Surface of Overdoped La-Based Cuprates

M. Horio, K. Hauser, Y. Sassa +24

We present a soft x-ray angle-resolved photoemission spectroscopy study of the overdoped high-temperature superconductors La $_{2 - x}$ Sr $_{x}$ CuO $_{4}$ and La $_{1.8 - x}$ Eu $_{0.2}$ Sr $_{x}$ Cu…

cond-mat.mtrl-sci2018

Higher-Order Topology in Bismuth

Frank Schindler, Zhijun Wang, Maia G. Vergniory +12

The mathematical field of topology has become a framework to describe the low-energy electronic structure of crystalline solids. A typical feature of a bulk insulating three-dimens…

cond-mat.str-el2018

Two-dimensional type-II Dirac fermions in layered oxides

M. Horio, C. E. Matt, K. Kramer +11

Relativistic massless Dirac fermions can be probed with high-energy physics experiments, but appear also as low-energy quasi-particle excitations in electronic band structures. In…

cond-mat.str-el2016

Highly-anisotropic exchange interactions of $j_{eff} = 1/2$ iridium moments on the fcc lattice in La $_{2} B$ IrO $_{6}$ ( $B$ $=$ Mg, Zn)

A. A. Aczel, A. M. Cook, T. J. Williams +6

We have performed inelastic neutron scattering (INS) experiments to investigate the magnetic excitations in the weakly distorted face-centered-cubic (fcc) iridate double perovskite…