Publications

2016

Real-space localization and quantification of hole distribution in chain-ladder Sr3Ca11Cu24O41 superconductor.
Matthieu Bugnet, Stefan Löffler, David Hawthorn, Hanna A. Dabkowska, Graeme M. Luke, Peter Schattschneider, George A. Sawatzky, Guillaume Radtke and Gianluigi A. Botton.
Science Advances 2, e1501652 (2016).

Material/element-dependent fluorescence-yield modes on soft X-ray absorption spectroscopy of cathode materials for Li-ion batteries.
Daisuke Asakura, Eiji Hosono, Yusuke Nanba, Haoshen Zhou, Jun Okabayashi, Chunmei Ban, Per-Anders Glans, Jinghua Guo, Takashi Mizokawa, Gang Chen, Andrew J. Achkar, David G. Hawthorn, Thomas Z. Regier and Hiroki Wadati.
AIP Advances 6, 035105 (2016).

Orbital symmetry of charge density wave order in La1.875Ba0.125CuO4 and YBa2Cu3O6.67.
A. J. Achkar, F. He, R. Sutarto, Christopher McMahon, M. Zwiebler, M. Hucker, G. D. Gu, Ruixing Liang, D. A. Bonn, W. N. Hardy, J. Geck and D. G. Hawthorn
Nature Materials 15, 616 (2016).

Nematicity in stripe-ordered cuprates probed via resonant x-ray scattering.
A. J. Achkar, M. Zwiebler, Christopher McMahon, F. He, R. Sutarto, Isaiah Djianto, Zhihao Hao, Michel J. P. Gingras, M. Hücker, G. D. Gu, A. Revcolevschi, H. Zhang, Y.-J. Kim, J. Geck and D. G. Hawthorn
Science 351, 576 (2016)

2015

Enhanced coherent oscillations in the superconducting state of underdoped YBa2Cu3O6+x induced via ultrafast terahertz excitation.
Georgi L. Dakovski, Wei-Sheng Lee, David G. Hawthorn, Niklas Garner, Doug Bonn, Walter Hardy, Ruixing Liang, Matthias C. Hoffmann, and Joshua J. Turner
Phys. Rev. B 91, 220506(R) (2015).

Symmetry of charge order in cuprates.
R. Comin, R. Sutarto, F. He, E. H. da Silva Neto, L. Chauviere, A. Fraño, R. Liang, W. N. Hardy, D. A. Bonn, Y. Yoshida, H. Eisaki, A. J. Achkar, D. G. Hawthorn, B. Keimer, G. A. Sawatzky and A. Damascelli
Nature Materials 14, 796 (2015).

Physical properties and electronic structure of a new barium titanate suboxide Ba1+δTi13−δO12 (δ = 0.11).
Costel R. Rotundu, Shan Jiang, Xiaoyu Deng, Yiting Qian, Saeed Khan, David G. Hawthorn, Gabriel Kotliar and Ni Ni
APL Mat. 3, 041517 (2015).

2014

Diamagnetism and density-wave order in the pseudogap regime of YBa2Cu3O6+x.
Lauren E. Hayward, Andrew J. Achkar, David G. Hawthorn, Roger G. Melko and Subir Sachdev.
Phys. Rev. B 90, 094515 (2014).

Impact of quenched oxygen disorder on charge density wave order in YBa2Cu3O6+x.
A. J. Achkar, X. Mao, Christopher McMahon, R. Sutarto, F. He, Ruixing Liang, D. A. Bonn, W. N. Hardy and D. G. Hawthorn
Phys. Rev. Lett. 113, 107002 (2014).

Resonant Elastic X-ray Scattering in Cuprate Superconductors.
David G. Hawthorn and Andrew J. Achkar
Physics in Canada 70, 13 (2014).

Atomic scale real-space mapping of holes in YBa2Cu3O6+δ
N. Gauquelin, D. G. Hawthorn, G. A. Sawatzky, R. X. Liang, D. A. Bonn, W. N. Hardy and G. A. Botton
Nature Communications 5, 4275 (2014).

Comment on “State-Dependent Electron Delocalization Dynamics at the Solute-Solvent Interface: Soft-X-Ray Absorption Spectroscopy and Ab initio Calculations”.
R. J. Green, D. Peak, A. J. Achkar, J. S. Tse, A. Moewes, D. G. Hawthorn and T. Z. Regier.
Phys. Rev. Lett. 112, 129301 (2014)

Angular Fluctuations of a Multicomponent Order Describe the Pseudogap of YBa2Cu3O6+x.
Lauren E. Hayward, David G. Hawthorn, Roger G. Melko and Subir Sachdev.
Science 343, 1336 (2014)

Revealing orbital and magnetic phase transitions in Pr0.5Ca0.5MnO3 epitaxial thin films by resonant soft x-ray scattering.
H Wadati, Geck, E Schierle, R Sutarto, F He, D G Hawthorn, M Nakamura, M Kawasaki, Y Tokura and G A Sawatzky.
New J. Phys. 12 033006 (2014).

2013

Role of Oxygen Holes in LixCoO2 Revealed by Soft X-Ray Spectroscopy.
T. Mizokawa, Y. Wakisaka, T. Sudayama, C. Iwai, K. Miyoshi, J. Takeuchi, H. Wadati, D. G. Hawthorn, T. Z. Regier and G. A. Sawatzky
Phys. Rev. Lett. 111, 056404 (2013).

Electronic superlattice revealed by resonant scattering from random impurities in Sr3Ru2O7.
M. A. Hossain, I. Zegkinoglou, Y.-D. Chuang, J. Geck, B. Bohnenbuck, A. G. Cruz Gonzalez,H.-H. Wu, C. Schüßler-Langeheine, D. G. Hawthorn, J. D. Denlinger, R. Mathieu, Y. Tokura, S. Satow, H. Takagi, Y. Yoshida, Z. Hussain, B. Keimer, G. A. Sawatzky and A. Damascelli
Scientific Reports 3, 2299 (2013).

Impact of Mn–O–O–Mn superexchange pathways in a honeycomb lattice Mn oxide with small charge-transfer energy.
H. Wadati, K. Kato, Y. Wakisaka, T. Sudayama, D.G. Hawthorn, T.Z. Regier, N. Onishi, M. Azuma, Y. Shimakawa, T. Mizokawa, A. Tanaka, G.A. Sawatzky
Solid State Communications 162, 18 (2013).

Resonant X-Ray Scattering Measurements of a Spatial Modulation of the Cu 3d and O 2p Energies in Stripe-Ordered Cuprate Superconductors.
A. J. Achkar, F. He, R. Sutarto, J. Geck, H. Zhang, Y.-J. Kim and D. G. Hawthorn.
Phys. Rev. Lett. 110, 017001 (2013).

2012

Distinct charge orders in the planes and chains of ortho-III ordered YBa2Cu3O6+δ superconductors identified by resonant elastic x-ray scattering
A. J. Achkar, R. Sutarto, X. Mao, F. He, A. Frano, S. Blanco-Canosa, M. Le Tacon, G. Ghiringhelli, L. Braicovich, M. Minola, M. Moretti Sala, C. Mazzoli, Ruixing Liang, D. A. Bonn, W. N. Hardy, B. Keimer, G. A. Sawatzky and D. G. Hawthorn.
Phys. Rev. Lett.109, 167001 (2012).

Dark channel fluorescence observations result from concentration effects rather than solvent–solute charge transfer
T. Z. Regier, A. J. Achkar, D. Peak, J. S. Tse and D. G. Hawthorn.
Nature Chemistry 4, 765 (2012).

Long-Range Incommensurate Charge Fluctuations in (Y,Nd)Ba2Cu3O6+x
G. Ghiringhelli, M. L. Tacon, M. Minola, S. Blanco-Canosa, C. Mazzoli, N. B. Brookes, G. M. De Luca, A. Frano, D. G. Hawthorn, F. He, T. Loew, M. M. Sala, D. C. Peets, M. Salluzzo, E. Schierle, R. Sutarto, G. A. Sawatzky, E. Weschke, B. Keimer, and L. Braicovich.
Science 337, 821 (2012).

Utility of the inverse partial fluorescence for electronic structure studies of battery materials. 

H. Wadati, A. J. Achkar, D. G. Hawthorn, T. Z. Regier, M. P. Singh, K. D. Truong, P. Fournier, G. Chen, T. Mizokawa and G. A. Sawatzky

Appl. Phys. Lett. 100, 193906 (2012).
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2011

Determination of total x-ray absorption coefficient using non-resonant x-ray emission.
A. J. Achkar, T. Z. Regier, E. J. Monkman, K. M. Shen and D. G. Hawthorn.  
Scientific Reports 1, 182 (2011).

Electronic structure of the SrTiO3/LaAlO3 interface revealed by resonant soft x-ray scattering. 
H. Wadati, J. Geck, D. G. Hawthorn, T. Higuchi, M. Hosoda, C Bell, Y. Hikita, H. Y. Hwang, C. Schussler-Langeheine, E. Schierle, E. Weschke and G. A. Sawatzky.
IOP Conf. Series: Materials Science and Engineering 24, 012012 (2011). 

Resonant elastic soft x-ray scattering in oxygen-ordered YBa2Cu3O6+delta.
D. G. Hawthorn, K. M. Shen, J. Geck, D. C. Peets, H. Wadati, J. Okamoto, S.-W. Huang, D. J. Huang, H.-J. Lin, J. D. Denlinger, Ruixing Liang, D. A. Bonn, W. N. Hardy and G. A. Sawatzky. 
Phys. Rev. B 84, 075125 (2011). 

An in-vacuum diffractometer for resonant elastic soft x-ray scattering. 
D. G. Hawthorn, F. He, L. Venema, H. Davis, A. J. Achkar, J. Zhang, R. Sutarto, H. Wadati, A. Radi, T. Wilson, G. Wright, K. M. Shen, J. Geck, H. Zhang, V. Novak and G. A. Sawatzky. 
Rev. Sci. Instrum. 82, 073104 (2011).

Co–O–O–Co superexchange pathways enhanced by small charge-transfer energy in multiferroic BiCoO
T. Sudayama, Y. Wakisaka, T. Mizokawa, H. Wadati, G. A. Sawatzky, D. G. Hawthorn, T. Z. Regier, K. Oka, M. Azuma, and Y. Shimakawa 
Phys. Rev. B 83, 235105 (2011).

Bulk Sensitive X-Ray Absorption Spectroscopy Free of Self-Absorption Effects. 
A. J. Achkar, T. Z. Regier, H. Wadati, Y.-J. Kim, H. Zhang, D. G. Hawthorn. 
Phys. Rev. B 83, 081106R (2011). 

LaVO4:Eu Phosphor films with enhanced Eu solubility.
T. Higuchi, Y. Hotta, Y. Hikata, S. Maruyama, Y. Hayamizu, H. Akiyama, H. Wadati, D. G. Hawthorn, T. Z. Regier, R. I. R. Blyth, G. A. Sawatzky and H. Y. Hwang. 
Appl. Phys. Lett. 98, 071902 (2011). 

2010

Spin and Charge Transport on the Surface of a Topological Insulator 
A. A. Burkov and D. G. Hawthorn 
Phys. Rev. Lett. 105, 066802 (2010). 

Valence evaluation of LiMnO2 and related battery materials by x-ray absorption spectroscopy. 
H. Wadati, D. G. Hawthorn, T. Z Regier, G. Chen, T. Hitosugi, T. Mizokawa, A. Tanaka and G. A. Sawatzky.
Appl. Phys. Lett. 97, 022106 (2010).

2009

Resonant soft x-ray scattering studies of interface reconstructions in SrTiO3/LaAlO3 superlattices. 
H. Wadati, D. G. Hawthorn, J. Geck, T. Higuchi, Y. Hikita, H. Y. Hwang, L. Fitting Kourkoutis, D. A. Muller, S.-W. Huang, D. J. Huang, H.-J. Lin, C. Schüßler-Langeheine, H.-H. Wu, E. Schierle, E. Weschke, N. J. C. Ingle and G. A. Sawatzky. 
J. Appl. Phys, 106, 083705 (2009). 

X-ray absorption spectra reveal the inapplicability of the single-band Hubbard model to overdoped cuprates.
D. C. Peets, D. G. Hawthorn, K. M. Shen, Young-June Kim, D. S. Ellis, H. Zhang, Seiki Komiya, Yoichi Ando, G. A. Sawatzky, Ruixing Liang, D. A. Bonn and W. N. Hardy. 
Phys. Rev. Lett. 103, 087402 (2009). 

Interface reconstruction in V-oxide heterostructures determined by x-ray absorption spectroscopy. 
H. Wadati, D. G. Hawthorn, J. Geck, T. Z. Regier, R. I. R. Blyth, T. Higuchi, Y. Hotta, Y. Hikita, H. Y. Hwang and G. A. Sawatzky. 
Appl. Phys. Lett. 95, 023115 (2009). 

Charge order in La1.8-xEu0.2SrxCuO4 studied by resonant soft x-ray diffraction. 
J. Fink, E. Schierle, E. Weschke, J. Geck, D. Hawthorn, H. Wadati, H. -H. Hu, H. A. Durr, N. Wizent, B. Buchner and G. A. Sawatzky. 
Phys. Rev. B 79, 100502 (2009).