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Dive into the research topics where Tom Hogan is active.

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Featured researches published by Tom Hogan.


Physical Review B | 2015

Influence of Electron Doping on the Ground State of (Sr1-xLax)2IrO4

Xiang Chen; Tom Hogan; Daniel Walkup; Wenwen Zhou; Mani Pokharel; Mengliang Yao; Wei Tian; Thomas Ward; Yang Zhao; D. Parshall; Cyril Opeil; Jeffrey W. Lynn; Vidya Madhavan; Stephen D. Wilson

The evolution of the electronic properties of electron-doped (Sr1-xLax)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 into an electronically phase separated state, where long-range magnetic order vanishes beyond x = 0:02 and charge transport remains percolative up to the limit of La substitution (x =0:06). In particular, the electronic ground state remains inhomogeneous even beyond the collapse of the parent states long-range antiferromagnetic order, while persistent short-range magnetism survives up to the highest La-substitution levels. Furthermore, as electrons are doped into Sr2IrO4, we observe the appearance of a low temperature magnetic glass-like state intermediate to the complete suppression of antiferromagnetic order. Universalities and di erences in the electron-doped phase diagrams of single layer and bilayer Ruddlesden-Popper strontium iridates are discussed.


Physical Review B | 2013

Neutron scattering study of correlated phase behavior in Sr 2 IrO 4

Chetan Dhital; Tom Hogan; Z. Yamani; Clarina de la Cruz; Xiang Chen; Sovit Khadka; Zhensong Ren; Stephen D. Wilson

Neutron diffraction measurements are presented exploring the magnetic and structural phase behaviors of the candidate J


Physical Review Letters | 2015

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

Tom Hogan; Z. Yamani; Daniel Walkup; Xiang Chen; Rebecca Dally; Thomas Ward; M. P. M. Dean; J. P. Hill; Zahirul Islam; Vidya Madhavan; Stephen D. Wilson

_{eff}=1/2


Physical Review Letters | 2014

Short-range correlations in the magnetic ground state of na4ir3 O8

Rebecca Dally; Tom Hogan; A. Amato; H. Luetkens; Chris Baines; J. A. Rodriguez-Rivera; M.J. Graf; Stephen D. Wilson

Mott insulating iridate Sr


Physical Review B | 2012

Magnetic order and the electronic ground state in the pyrochlore iridate Nd2Ir2O7

Steven Disseler; Chetan Dhital; Tom Hogan; A. Amato; Sean Giblin; C. de la Cruz; A. Daoud-Aladine; Stephen D. Wilson; M.J. Graf

_2


Physical Review B | 2012

Spin ordering and electronic texture in the bilayer iridate Sr3Ir2O7

Chetan Dhital; Sovit Khadka; Z. Yamani; Clarina de la Cruz; Tom Hogan; Steven Disseler; Mani Pokharel; Kevin Lukas; Wei Tian; Cyril Opeil; Ziqiang Wang; Stephen D. Wilson

IrO


Physical Review B | 2016

Structural investigation of the bilayer iridate Sr_3Ir_2O_7

Tom Hogan; Lars Bjaalie; Liuyan Zhao; Carina Belvin; Xiaoping Wang; Chris G. Van de Walle; David Hsieh; Stephen D. Wilson

_4


Physical Review B | 2016

Disordered dimer state in electron-doped Sr3Ir2O7

Tom Hogan; Rebecca Dally; M. H. Upton; J. P. Clancy; K. D. Finkelstein; Young-June Kim; M.J. Graf; Stephen D. Wilson

. Comparisons are drawn between the correlated magnetism in this single layer system and its bilayer analog Sr


Physical Review B | 2014

Evolution of antiferromagnetic susceptibility under uniaxial pressure in Ba(Fe1 xCox)2As2

Chetan Dhital; Tom Hogan; Z. Yamani; R. J. Birgeneau; Wei Tian; Masaaki Matsuda; Athena S. Sefat; Ziqiang Wang; Stephen D. Wilson

_3


Journal of Physics: Conference Series | 2014

Magnetism and magnetic order in the pyrochlore iridates in the insulator-to-metal crossover region

M.J. Graf; S M Disseler; Chetan Dhital; Tom Hogan; M Bojko; A Amato; H Luetkens; C Baines; D Margineda; Sean Giblin; M Jura; S D Wilson

Ir

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Stephen Wilson

University of Strathclyde

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Z. Yamani

National Research Council

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Wei Tian

Oak Ridge National Laboratory

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