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Infrared study of the multiband low-energy excitations of the topological antiferromagnet MnBi2Te4

Xu, Bing ; Zhang, Y. ; Alizade, E. H. ; Jahangirli, Z. A. ; Lyzwa, Fryderyk ; Sheveleva, Evgeniia ; Marsik, Premysl ; Li, Y. K. ; Yao, Y. G. ; Wang, Z. W. ; Shen, B. ; Dai, Y. M. ; Kataev, V. ; Otrokov, M. M. ; Chulkov, E. V. ; Mamedov, N. T. ; Bernhard, Christian

In: Physical Review B, 2021, vol. 103, no. 12, p. L121103

With infrared spectroscopy, we studied the bulk electronic properties of the topological antiferromagnet MnBi2Te4 with TN ≃ 25 K. With the support of band-structure calculations, we assign the intra- and interband excitations and determine the band gap of Eg ≈ 0.17 eV. We also obtain evidence for two types of conduction bands with light and very heavy carriers. The multiband free-carrier...

Multi-revolution composition methods for highly oscillatory differential equations

Chartier, Philippe ; Makazaga, Joseba ; Murua, Ander ; Vilmart, Gilles

In: Numerische Mathematik, 2014, vol. 128, no. 1, p. 167-192

Isometric Group Actions on Hilbert Spaces: Growth of Cocycles

de Cornulier, Yves ; Tessera, Romain ; Valette, Alain

In: GAFA Geometric And Functional Analysis, 2007, vol. 17, no. 3, p. 770-792

Numerical Energy Conservation for Multi-Frequency Oscillatory Differential Equations

Cohen, D. ; Hairer, E. ; Lubich, Ch

In: BIT Numerical Mathematics, 2005, vol. 45, no. 2, p. 287-305

Continental extension: Introduction

Bernoulli, Daniel ; Brun, Jean-Pierre ; Burg, Jean-Pierre

In: International Journal of Earth Sciences, 2007, vol. 96, no. 6, p. 977-978

Algebraic Structures of B-series

Chartier, Philippe ; Hairer, Ernst ; Vilmart, Gilles

In: Foundations of Computational Mathematics, 2010, vol. 10, no. 4, p. 407-427

Convergence analysis of trigonometric methods for stiff second-order stochastic differential equations

Cohen, David ; Sigg, Magdalena

In: Numerische Mathematik, 2012, vol. 121, no. 1, p. 1-29

Atoms of All Channels, Unite! Average Case Analysis ofMulti-Channel Sparse Recovery Using Greedy Algorithms

Gribonval, Rémi ; Rauhut, Holger ; Schnass, Karin ; Vandergheynst, Pierre

In: Journal of Fourier Analysis and Applications, 2008, vol. 14, no. 5-6, p. 655-687

A suite of definitions for consistency criteria in distributed shared memories = un ensemble hiérarchique de définitions pour les critères de cohérence dans les mémoires distribuées partagées

Raynal, Michel ; Schiper, André

In: Annales Des Télécommunications, 1997, vol. 52, no. 11-12, p. 652-661

Mean-square A -stable diagonally drift-implicit integrators of weak second order for stiff Itô stochastic differential equations

Abdulle, A. ; Vilmart, G. ; Zygalakis, K.

In: BIT Numerical Mathematics, 2013, vol. 53, no. 4, p. 827-840