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Dr. Brad Ramshaw — Curriculum Vitae
Pulsed Field Facility
Los Alamos National Laboratory
TA-35, Buildilng 127, E536
Los Alamos, NM, 87545
Phone:
Email:
505-500-5559
[email protected]
Education
Doctorate in Physics
2007-2012
University of British Columbia
Supervisor: Dr. Doug Bonn
Thesis: Shubnikov-de Haas Measurements and the Spin Magnetic Moment of YBa2 Cu3 O6.59
GPA: 89.1/100
Bachelor of Science (Honours): Physics and Computer Science
2002-2007
University of British Columbia
Supervisor: Dr. Doug Bonn
Honours Thesis: Microwave Properties of Bismuth
GPA: 79.0/100
Honours and Scholarships
Directors Fellow: Los Alamos National Labs
2013
Directors fellowship funding at Los Alamos National Labs for two year term starting Sept 2013.
Outstanding Poster Award: Winner
2013
Los Alamos post-doc research day. 9 winners, 90 entries from 17 divisions.
Martin and Beate Block Physics Award
2011
Awarded for best work by a young physicist at the Aspen Winter Physics Conference: Contrasting Superconductivity of Pnictides and Cuprates.
Natural Sciences and Engineering Research Council Post-Graduate
Scholarship - Doctorate
2010-2012
Canada-wide competitive scholarship.
Four Year Fellowship for PhD Students
2009-2012
Internal competitive award at the University of British Columbia.
Virginia Graczak Music Scholarship
2002
Competitive scholarship in classical piano performance.
Employment
Postdoctoral Researcher
August 2012 - Present
Los Alamos National Labs. Resonant ultrasound spectroscopy and pulsed field transport on high-Tc and
heavy Fermion superconductors.
Doctoral Student
September 2007 - July 2012
University of British Columbia. Shubnikov-de Haas oscillations in c-axis transport of YBa2 Cu3 O6+δ ; Tl-2201
microwave penetration depth.
Course Specific Teaching Assistant
September 2007 - May 2012
University of British Columbia. Training of other teaching assistants for the undergrad physics laboratory,
course material development, lab instruction.
Undergraduate Research Assistant
May 2005 - September 2007
University of British Columbia. DC resistivity measurements on YBa2 Cu3 O6+δ ; instrument automation
with Labview software; microwave measurements on YBa2 Cu3 O6+δ .
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Peer Reviewed Publications
[1] B. J. Ramshaw, S. E. Sebastian, R. D. McDonald, James Day, B. S. Tan, Z. Zhu,
J. B. Betts, Ruixing Liang, D. A. Bonn, W. N. Hardy, and N. Harrison. Quasiparticle mass enhancement approaching optimal doping in a high-Tc superconductor.
Science, 2015
[2] B. J. Ramshaw, Arkady Shekhter, Ross D. McDonald, Jon B. Betts, J. N.
Mitchell, P. H. Tobash, C. H. Mielke, E. D. Bauer, and Albert Migliori. Avoided
valence transition in a plutonium superconductor. Proceedings of the National
Academy of Sciences, 112(11):3285–3289, 2015
[3] N Doiron-Leyraud, S Badoux, S Ren´e de Cotret, S Lepault, D LeBoeuf, F Lalibert´e,
E Hassinger, B. J. Ramshaw, DA Bonn, WN Hardy, et al. Evidence for a small hole
pocket in the fermi surface of underdoped YBa2 Cu3 Oy . Nature Communications,
6, 2015
[4] G Grissonnanche, F Laliberte, S Dufour-Beausejour, M Matusiak, S Badoux,
FF Tafti, B Michon, A Riopel, O Cyr-Choiniere, JC Baglo, B. J. Ramshaw,
R. Liang, D. A. Bonn, W. N. Hardy, S. Kramer, D. LeBoeuf, D. Graf, N. DoironLeyraud, and L. Taillefer. Wiedemann-franz law in the underdoped cuprate superconductor YBa2 Cu3 Oy . arXiv preprint arXiv:1503.07572, 2015
[5] N Shapira, Y Lamhot, O Shpielberg, Y Kafri, B. J. Ramshaw, DA Bonn, Ruixing
Liang, WN Hardy, and OM Auslaender. Disorder induced power-law response of a
superconducting vortex on a plane. arXiv preprint arXiv:1401.0995, 2014
[6] G Grissonnanche, O Cyr-Choiniere, F Laliberte, S Rene de Cotret, A JuneauFecteau, S Dufour-Beausejour, M-E Delage, D LeBoeuf, J Chang, B. J. Ramshaw,
D. A. Bonn, W. N. Hardy, Ruixing Liang, S. Adachi, N. E. Hussey, B. Vignolle,
C. Proust, M. Sutherland, S. Kramer, J.-H. Park, D. Graf, N. Doiron-Leyraud, and
Louis. Taillefer. Direct measurement of the upper critical field in a cuprate superconductor. Nature Communications, 5, Feb 2014
[7] A. Shekhter, B. J. Ramshaw, R. D. McDonald, J. B. Betts, F. Balakirev, Ruixing
Liang, W. N. Hardy, D. A. Bonn, Scott C. Riggs, and Albert Migliori. Bounding the
pseudogap with a line of phase transitions in YBa2 Cu3 O6+δ . Nature, 498(7452):75–
77, 2013
[8] B. J. Ramshaw, James Day, Baptiste Vignolle, David LeBoeuf, P. Dosanjh, Cyril
Proust, Louis Taillefer, Ruixing Liang, W. N. Hardy, and D. A. Bonn. Vortex lattice
melting and Hc2 in underdoped YBa2 Cu3 O6+δ . Phys. Rev. B, 86:174501, Nov 2012
[9] B. Vignolle, B. J. Ramshaw, James Day, David LeBoeuf, St´ephane Lepault,
Ruixing Liang, W. N. Hardy, D. A. Bonn, Louis Taillefer, and Cyril Proust. Coherent
c-axis transport in the underdoped cuprate superconductor YBa2 Cu3 O6+δ . Physical
Review B, 85(22):224524, 2012
[10] B. J. Ramshaw, Baptiste Vignolle, James Day, Ruixing Liang, W. N.
Hardy, Cyril Proust, and D. A. Bonn. Angle dependence of quantum oscillations
in YBa2 Cu3 O6.59 shows free-spin behaviour of quasiparticles. Nature Physics,
7(3):234–238, Mar 2011
[11] J. Chang, Nicolas Doiron-Leyraud, Francis Lalibert´e, R. Daou, David LeBoeuf,
B. J. Ramshaw, Ruixing Liang, D. A. Bonn, W. N. Hardy, Cyril Proust, I. Sheikin,
K. Behnia, and Louis Taillefer. Nernst effect in the cuprate superconductor
YBa2 Cu3 Oy : Broken rotational and translational symmetries. Phys. Rev. B,
84:014507, Jul 2011
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[12] David LeBoeuf, Nicolas Doiron-Leyraud, B. Vignolle, Mike Sutherland, B. J.
Ramshaw, J. Levallois, R. Daou, Francis Lalibert´e, Olivier Cyr-Choini`ere, Johan
Chang, Y. J. Jo, L. Balicas, Ruixing Liang, D. A. Bonn, W. N. Hardy, Cyril
Proust, and Louis Taillefer. Lifshitz critical point in the cuprate superconductor
YBa2 Cu3 O6+δ from high-field hall effect measurements. Phys. Rev. B, 83:054506,
Feb 2011
[13] F. Laliberte, J. Chang, N. Doiron-Leyraud, E. Hassinger, R. Daou, M. Rondeau,
B. J. Ramshaw, R. Liang, D. A. Bonn, W. N. Hardy, S. Pyon, T. Takayama, H. Takagi, I. Sheikin, L. Malone, C. Proust, K. Behnia, and Louis Taillefer. Fermi-surface
reconstruction by stripe order in cuprate superconductors. Nature Communications, 2, Aug 2011
[14] Baptiste Vignolle, David Vignolles, David LeBoeuf, St´ephane Lepault, Brad
Ramshaw, Ruixing Liang, DA Bonn, WN Hardy, Nicolas Doiron-Leyraud, A Carrington, N. E. Hussey, Louis Taillefer, and Cyril Proust. Quantum oscillations and
the Fermi surface of high-temperature cuprate superconductors. Comptes Rendus
Physique, 12(5):446–460, 2011
[15] J. S. Bobowski, J. C. Baglo, James Day, P. Dosanjh, Rinat Ofer, B. J. Ramshaw,
Ruixing Liang, D. A. Bonn, W. N. Hardy, Huiqian Luo, Zhao-Sheng Wang, Lei Fang,
and Hai-Hu Wen. Precision microwave electrodynamic measurements of K- and Codoped BaFe2 As2 . Phys. Rev. B, 82:094520, Sep 2010
[16] R. Daou, J. Chang, David LeBoeuf, Olivier Cyr-Choini`ere, Francis Laliberte,
Nicolas Doiron-Leyraud, B. J. Ramshaw, Ruixing Liang, D. A. Bonn, W. N. Hardy,
and Louis Taillefer. Broken rotational symmetry in the pseudogap phase of a high-Tc
superconductor. Nature, 463(7280):519–522, Jan 2010
[17] J. Chang, R. Daou, Cyril Proust, David LeBoeuf, Nicolas Doiron-Leyraud, Francis
Lalibert´e, B. Pingault, B. J. Ramshaw, Ruixing Liang, D. A. Bonn, W. N. Hardy,
H. Takagi, A. B. Antunes, I. Sheikin, K. Behnia, and Louis Taillefer. Nernst and
seebeck coefficients of the cuprate superconductor YBa2 Cu3 O6.67 : A study of fermi
surface reconstruction. Phys. Rev. Lett., 104:057005, Feb 2010
[18] David LeBoeuf, Nicolas Doiron-Leyraud, Julien Levallois, R. Daou, J.-B. Bonnemaison, N. E. Hussey, L. Balicas, B. J. Ramshaw, Ruixing Liang, D. A. Bonn,
W. N. Hardy, S. Adachi, Cyril Proust, and Louis Taillefer. Electron pockets in the
fermi surface of hole-doped high-Tc superconductors. Nature, 450(7169):533–536,
Nov 22 2007
h-index
12
Invited Talks
University of Chicago
2015
Department of Physics Colloquium
Stanford University
2015
Condensed Matter Physics Seminar
University of Washington
2014
Department of Physics Colloquium
University of California, Berkeley.
2014
290 K Condensed Matter Seminar Series
Superstripes 2014, Erice, Sicily
2014
Invited speaker
Stanford University
2014
Condensed Matter Physics Seminar
3
University of California, Los Angeles
2014
Physics and Astronomy Colloquium
Materials Research Society Spring Meeting 2014, San Francisco.
2014
Invited speaker
University of Maryland, College Park
2014
CNAM Condensed Matter Colloquium
University of British Columbia, Vancouver
2014
Condensed Matter Seminar
Aspen Winter Physics Conference
2014
Unconventional Order in Strongly Correlated Electron Systems.
Cornell University, Ithaca
2013
Laboratory of Atomic and Solid State Physics Seminar
Canadian Institute for Advanced Research, Vancouver
2013
Quantum Materials Meeting
University of California, Los Angeles
2012
Condensed Matter Seminar
University of British Columbia, Vancouver
2011
International Summer School on Surfaces and Interfaces in Correlated oxides
Aspen Winter Physics Conference
2011
Contrasting Superconductivity of Pnictides and Cuprates
Physical Phenomena at High Magnetic Fields VII, Tallahassee, Florida 2010
Invited speaker
University of British Coulumbia, Vancouver
2009
Condensed Matter Seminar
Contributed Presentations
American Physical Society March Meeting, San Antonio,Texas
2015
Contributed talk
Los Alamos Post-Doc Research Day, Los Alamos, New Mexico
2013
Poster presentation
American Physical Society March Meeting, Baltimore, Maryland
2013
Contributed talk
Gordon Research Conference on Correlated Electron Systems, Mount
Holyoke College, Massachusetts
2010
Poster presentation
American Physical Society March Meeting, Portland, Oregon
2010
Contributed talk
American Physical Society March Meeting, Pittsburgh, Pennsylvania
2009
Contributed talk
Conference Organization and Outreach
Canadian Institute for Advanced Research Summer School: organizer
2009
One of 3 PhD students that organized a 3-day summer school at UBC, including food, accommodation, and
lecture venues for over 90 students and 10 speakers.
Let’s Talk Science: volunteer
2011-2012
Visited elementary school classrooms, giving science demonstrations and organizing group activities for
grades 1 and 2 students.
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Physics in the Field Seminar Series: co-founder and organizer
2013-2014
Started at seminar series at the pulsed field facility at Los Alamos National Labs, with a focus on bringing
in PhD students from across the country to talk about their latest research.
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