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Cooperative photoinduced metastable phase control in strained manganite films
Jingdi Zhang, Xuelian Tan, Mengkun Liu +7
A major challenge in condensed matter physics is active control of quantum phases. Dynamic control with pulsed electromagnetic fields can overcome energetic barriers enabling acces…
From Hunds insulator to Fermi liquid: Optical spectroscopy study of K doping in BaMnAs
D. E. McNally, S. Zellman, Z. P. Yin +7
We present optical transmission measurements that reveal a charge gap of 0.86 eV in the local moment antiferromagnetic insulator BaMnAs, an order of magnitude larger than p…
Random Field Driven Spatial Complexity at the Mott Transition in VO2
Shuo Liu, B. Phillabaum, E. W. Carlson +4
We report the first application of critical cluster techniques to the Mott metal-insulator transition in vanadium dioxide. We show that the geometric properties of the metallic and…
Antiferromagnetic Exchange, Hund's Coupling and the Origin of the Charge Gap in LaMnPO
D. E. McNally, J. W. Simonson, K. W. Post +12
We present inelastic neutron scattering and magnetization measurements of the antiferromagnetic insulator LaMnPO that are well described by a Heisenberg spin model. These measureme…
Anisotropic Infrared Response of Vanadium Dioxide Microcrystals
T. J. Huffman, Peng Xu, M. M. Qazilbash +8
Vanadium dioxide (VO2) undergoes a phase transition at a temperature of 340 K between an insulating monoclinic M1 phase and a conducting rutile phase. Accurate measurements of poss…
Three-dimensional Dirac fermions in quasicrystals as seen via optical conductivity
T. Timusk, J. P. Carbotte, C. C. Homes +2
The optical conductivity of quasicrystals is characterized by two features not seen in ordinary metallic systems. There is an absence of the Drude peak and the interband conductivi…