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The influence of electron-doping on the ground state of (Sr{1-x}La{x})2IrO4

Autor: Chen, Xiang, Hogan, Tom, Walkup, D., Zhou, Wenwen, Pokharel, M., Yao, Mengliang, Tian, Wei, Ward, Thomas Z., Zhao, Y., Parshall, D., Opeil, C., Lynn, J. W., Madhavan, Vidya, Wilson, Stephen D.

Publikováno v: Phys. Rev. B 92, 075125 (2015)

The evolution of the electronic properties of electron-doped (Sr{1-x}La{x})2IrO4 is experimentally explored as the doping limit of La is approached. As electrons are introduced, the electronic ground state transitions from a spin-orbit Mott phase int

Externí odkaz: http://arxiv.org/abs/1506.07574

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First-order melting of a weak spin-orbit Mott insulator into a correlated metal

Autor: Hogan, Tom, Yamani, Z., Walkup, D., Chen, Xiang, Dally, Rebecca, Ward, Thomas Z., Hill, John, Islam, Z., Madhavan, Vidya, Wilson, Stephen D.

Publikováno v: Physical Review Letters 114, 257203 (2015)

The electronic phase diagram of the weak spin-orbit Mott insulator (Sr(1-x)Lax)3Ir2O7 is determined via an exhaustive experimental study. Upon doping electrons via La substitution, an immediate collapse in resistivity occurs along with a narrow regim

Externí odkaz: http://arxiv.org/abs/1506.00041

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Ripple modulated electronic structure of a 3D topological insulator

Autor: Okada, Yoshinori, Zhou, Wenwen, Walkup, D., Dhital, Chetan, Wilson, S. D., Madhavan, V.

Publikováno v: Nature Communications 3, 1158 (2012)

3D topological insulators, similar to the Dirac material graphene, host linearly dispersing states with unique properties and a strong potential for applications. A key, missing element in realizing some of the more exotic states in topological insul

Externí odkaz: http://arxiv.org/abs/1207.4468

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Visualizing Landau levels of Dirac electrons in a one dimensional potential

Autor: Okada, Yoshinori, Zhou, Wenwen, Dhital, Chetan., Walkup, D., Ran, Ying, Wang, Z., Wilson, Stephen D., Madhavan, V.

Publikováno v: Phys. Rev. Lett. 109, 166407 (2012)

Using scanning tunneling spectroscopy we have measured the response of Dirac electrons in a magnetic field to the presence of a well-defined smoothly varying 1D periodic potential. We find that the lower index Landau level energies reliably trace the

Externí odkaz: http://arxiv.org/abs/1205.6230

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One-dimensional channel for Dirac electrons in a 3D topological insulator

Autor: Okada, Yoshinori, Zhou, Wenwen, Dhital, Chetan., Walkup, D., Ran, Ying, Wang, Z., Wilson, Stephen D., Madhavan, V.

Topological insulators represent a new state of matter where the topological nature of the bulk bands dictates the existence of a surface state with unique properties. These materials are predicted to host exotic states such as Majorana Fermions and

Externí odkaz: http://arxiv.org/abs/1203.0020

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