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Lattice-site-specific spin-dynamics in double perovskite Sr2CoOsO6
Binghai Yan, Avijit Kumar Paul, Sudipta Kanungo +12
We have studied the magnetic properties and spin-dynamics of the structurally-ordered double perovskite SrCoOsO. Our neutron diffraction, muon spin relaxation and ac-suscep…
Graphene-based topological insulator with an intrinsic bulk band gap above room temperature
Liangzhi Kou, Binghai Yan, Feiming Hu +5
Topological insulators (TIs) represent a new quantum state of matter characterized by robust gapless states inside the insulating bulk gap. The metallic edge states of a two-dimens…
Proximity Enhanced Quantum Spin Hall State in Graphene
Liangzhi Kou, Feiming Hu, Binghai Yan +4
Graphene is the first model system of two-dimensional topological insulator (TI), also known as quantum spin Hall (QSH) insulator. The QSH effect in graphene, however, has eluded d…
Lattice Instability and Competing Spin Structures in the Double Perovskite Insulator Sr2FeOsO6
Avijit Kumar Paul, Manfred Reehuis, Vadim Ksenofontov +6
The semiconductor Sr2FeOsO6, depending on temperature, adopts two types of spin structures that differ in the spin sequence of ferrimagnetic iron - osmium layers along the tetragon…
A large energy-gap oxide topological insulator based on the superconductor BaBiO3
Binghai Yan, Martin Jansen, Claudia Felser
Mixed-valent perovskite oxides based on BaBiO3 (BBO) are, like cuperates, well-known high-Tc superconductors. Recent ab inito calculations have assigned the high-Tc superconductivi…
Large resistivity change and phase transition in LiMnAs
A. Beleanu, J. Kiss, G. Kreiner +16
Antiferromagnetic semiconductors are new alternative materials for spintronic applications and spin valves. In this work, we report a detailed investigation of two antiferromagneti…