7 papers
Direct observation of surface state thermal oscillation in SmB6 oscillators
Brian Casas, Alex Stern, Dmitry K. Efimkin +2
SmB6 is a mixed valence Kondo insulator that exhibits a sharp increase in resistance following an activated behavior that levels off and saturates below 4K. This behavior can be ex…
Discovery of intrinsic ferromagnetism in 2D van der Waals crystals
Cheng Gong, Lin Li, Zhenglu Li +12
It has been long hoped that the realization of long-range ferromagnetic order in two-dimensional (2D) van der Waals (vdW) crystals, combined with their rich electronic and optical…
Topological transitions induced by antiferromagnetism in a thin-film topological insulator
Qing Lin He, Gen Yin, Luyan Yu +14
Ferromagnetism in topological insulators (TIs) opens a topologically non-trivial exchange band gap, providing an exciting platform to manipulate the topological order through an ex…
Time-Reversal-Symmetry-Breaking Superconductivity in Epitaxial Bismuth/Nickel Bilayers
Xinxin Gong, Mehdi Kargarian, Alex Stern +6
Superconductivity that spontaneously breaks time-reversal symmetry (TRS) has been found, so far, only in a handful of 3D crystals with bulk inversion symmetry. Here we report an ob…
Kondo insulator SmB6 under strain: surface dominated conduction near room temperature
A. Stern, M. Dzero, V. M. Galitski +2
SmB6 is a strongly correlated mixed-valence Kondo insulator with a newly discovered surface state, proposed to be of non-trivial topological origin. However, the surface state domi…
Chiral Majorana edge state in a quantum anomalous Hall insulator-superconductor structure
Qing Lin He, Lei Pan, Alexander L. Stern +16
After the recognition of the possibility to implement Majorana fermions using the building blocks of solid-state matters, the detection of this peculiar particle has been an intens…