Chemical bonding dictates drastic critical temperature difference in two seemingly identical superconductors

RH Lavroff, J Munarriz, CE Dickerson… - Proceedings of the …, 2024 - National Acad Sciences
Though YB6 and LaB6 share the same crystal structure, atomic valence electron
configuration, and phonon modes, they exhibit drastically different phonon-mediated …

Crystal Field Ground State of the Strongly Correlated Topological Insulator

M Sundermann, H Yavaş, K Chen, DJ Kim, Z Fisk… - Physical review …, 2018 - APS
We investigated the crystal-electric field ground state of the 4 f manifold in the strongly
correlated topological insulator SmB 6 using core-level nonresonant inelastic x-ray …

Surface-dominated conduction up to 240 K in the Kondo insulator SmB6 under strain

A Stern, M Dzero, VM Galitski, Z Fisk, J **a - Nature materials, 2017 - nature.com
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 …

Mixed-valence state in the dilute-impurity regime of La-substituted SmB6

M Zonno, M Michiardi, F Boschini, G Levy… - Nature …, 2024 - nature.com
Homogeneous mixed-valence (MV) behaviour is one of the most intriguing phenomena of f-
electron systems. Despite extensive efforts, a fundamental aspect which remains unsettled is …

Quantum phase transition and destruction of Kondo effect in pressurized SmB6

Y Zhou, Q Wu, PFS Rosa, R Yu, J Guo, W Yi, S Zhang… - Science bulletin, 2017 - Elsevier
SmB 6 has been a well-known Kondo insulator for decades, but recently attracts extensive
new attention as a candidate topological system. Studying SmB 6 under pressure provides …

Bulk and surface electronic properties of : A hard x-ray photoelectron spectroscopy study

Y Utsumi, D Kasinathan, KT Ko, S Agrestini… - Physical Review B, 2017 - APS
We have carried out bulk-sensitive hard x-ray photoelectron spectroscopy measurements on
in situ cleaved and ex situ polished SmB 6 single crystals. Using the multiplet structure in the …

Bulk and surface properties of SmB6

PFS Rosa, Z Fisk - Rare-Earth Borides, 2021 - taylorfrancis.com
Samarium hexaboride crystallizes in a simple cubic structure (space group# 221, Pm3̄m),
but its properties are far from being straightforward. Initially classified as a Kondo insulator …

Magnetic states in a three-dimensional topological Kondo insulator

R Peters, T Yoshida, N Kawakami - Physical Review B, 2018 - APS
We theoretically study the magnetic phase diagram of a three-dimensional topological
Kondo insulator by means of real-space dynamical mean-field theory. We find that …

Anomalous antiferromagnetic topological phase in pressurized

KW Chang, PJ Chen - Physical Review B, 2018 - APS
Antiferromagnetic materials, whose time-reversal symmetry is broken, can be classified into
the Z 2 topology if they respect some specific symmetry. Since the theoretical proposal …

Pressure-driven valence increase and metallization in the Kondo insulator

DJ Campbell, ZE Brubaker, C Roncaioli, P Saraf… - Physical Review B, 2019 - APS
We report the results of high-pressure x-ray diffraction, x-ray absorption, and electrical
transport measurements of the Kondo insulator (KI) Ce 3 Bi 4 Pt 3 up to 42 GPa, the highest …