Publications
Highlights
(For a full list see below or go to Google Scholar, ResearcherID)
We introduce a platform for bringing new, device-based functionality to STM, with the goal of utilizing decades of progress in device engineering for the field of scanning probe.
M Leeuwenhoek, RA Norte, KM Bastiaans, Doohee Cho, I Battisti, YaM Blanter, S Gröblacher, MP Allan
We propose an approach to transform a ‘pristine’ material into a better (meta-) superconductor by making use of modern fabrication techniques – designing and engineering the electronic properties of thin films via periodic patterning on the nanoscale.
MP Allan, MH Fischer, O Ostojic, A Andringa
We develop a simple model to interpret STM results on lightly doped Mott insulators, and find that the effective Mott gap measured by STM correspons to the one measured with other techniques when taking into account the poor electronic screeing.
I Battisti, V Fedoseev, KM Bastiaans, A de la Torre, RS Perry, F Baumberger, MP Allan
Phys. Rev. B 95, 235141, Editors’ suggestion (2017)
We discover of electronic order, pseudo gap phase separation and an impurity-band Mott transition in an iridate compound, cuprate-style. Along the way, we gained unique knowledge on how a Mott state collapses.
I. Battisti* & K.M. Bastiaans*, V. Fedoseev, A. de la Torre, N. Iliopoulos, A. Tamai, E.C. Hunter, R.S. Perry, J. Zaanen, F. Baumberger, M.P. Allan
See also Leiden University news by Erik Arends, Phys.org
Both the density of states and the QPI dispersion of LiFeAs shows signatures of electron-boson coupling. Comparing these with fingerprints of different boson couplings to conclude that these signatures stem from AF spin fluctuations.
MP Allan* & Kyungmin Lee* & AW Rost*, MH Fischer, F Massee, K Kihou, C-H Lee, A Iyo, H Eisaki, T-M Chuang, AP Mackenzie, JC Davis, DJ Scalapino, E-A Kim
See also Cornell Chronicle by Anne Ju, Phys.org
The heavy Fermion superconductor CeCoIn5 has a d-wave gap with nodes along the (1,1) direction, as we find using QPI.
MP Allan* & F Massee*, DK Morr, J van Dyke, AW Rost, AP Mackenzie, C Petrovic, JC Davis
Featured in ‘News and Views’ by L Taillefer
See also Phys.org, DoE headliner
Using APRES, we find that the bands in Sr3Ru2O7 look more like in heavy fermion material than in a normal metal. We present a detailed investigation into the formation of this particular electronic structure.
MP Allan, A Tamai, E Rozbicki, MH Fischer, J Voss, PDC King, W Meevasana, S Thirupathaiah, E Rienks, J Fink, A Tennant, RS Perry, JF Mercure, MA Wang, J Lee, CJ Fennie, E-A Kim, MJ Lawler, KM Shen, AP Mackenzie, Z-X Shen, F Baumberger
New Journal of Physics 15, 063029 (2013)
We elucidate on the formation of the electronic nematic state in Co-CaFe2As2, finding that the Cobalt dopant atoms play a key role.
MP Allan, T-M Chuang, F Massee, Y Xie, N Ni, SL Bud’ko, GS Boebinger, Q Wang, DS Dessau, PC Canfield, MS Golden, JC Davis
See also Tech Connect by Jennifer Rocha, Phys.org by Bill Steele
In contrast to earlier photoemission reports, we show that the gaps in iron based superconductors are not isotropic but modulated with angle.
MP Allan⋆ & AW Rost⋆, AP Mackenzie, Y Xie, JC Davis, K Kihou, CH Lee, A Iyo, H Eisaki, T-M Chuang
See also Cornell Cornincle by Bill Steele, Eureka Alert
We discovered an electronic nematic in the iron based superconductor Co-CaFe2As2! This state is by now confirmed and quite well characterized by transport, photoemission, and more SI-STM experiments.
T-M Chuang* & MP Allan*, J Lee, Y Xie, N Ni, SL Bud’ko, GS Boebinger PC Canfield, JC Davis
Featured in a ‘Perspective’ by E Fradkin & SA Kivelson
See also Article on NewScientist by Colin Barras
Hexagonal boron nitride shows fancy superstructures on the Mo(111) surface.
MP Allan, S Berner, M Corso, T Greber, J Osterwalder
Nanoscale Research Letters 2, 94 (2007)
Full List
Nanofabricated tips as a platform for double-tip and device based scanning tunneling microscopy
M Leeuwenhoek, RA Norte, KM Bastiaans, Doohee Cho, I Battisti, YaM Blanter, S Gröblacher, MP Allan
arxiv:1712.08620 (2017)
Revisiting quasiparticle scattering interference in high-temperature superconductors: the problem of narrow peaks
MA Sulangi, MP Allan, J Zaanen
PRB 96, 134507 (2017)
Robust procedure for creating and characterizing the atomic structure of scanning tunneling microscope tips
S Tewari, KM Bastiaans, MP Allan, JM van Ruitenbeek
Beilstein J. Nanotechnol. 8, 2389 (2017)
Creating better superconductors by periodic nanopatterning
MP Allan, MH Fischer, O Ostojic, A Andringa
SciPost Phys. 3, 010 (2017)
Poor electronic screening in lightly doped Mott insulators observed with scanning tunneling microscopy
I Battisti, V Fedoseev, KM Bastiaans, A de la Torre, RS Perry, F Baumberger, MP Allan
Phys. Rev. B 95, 235141, Editors’ suggestion (2017)
Universality of pseudo gap and emergent order in lightly doped Mott insulators
I. Battisti* & K.M. Bastiaans*, V. Fedoseev, A. de la Torre, N. Iliopoulos, A. Tamai, E.C. Hunter, R.S. Perry, J. Zaanen, F. Baumberger, M.P. Allan
Nature Physics 13, 21 (2017)
Identifying the fingerprint of antiferromagnetic spin fluctuations in iron pnictide superconductors
MP Allan* & Kyungmin Lee* & AW Rost*, MH Fischer, F Massee, K Kihou, C-H Lee, A Iyo, H Eisaki, T-M Chuang, AP Mackenzie, JC Davis, DJ Scalapino, E-A Kim
Nature Physics 11, 177 (2015)
Direct evidence for a magnetic f-electron mediated Cooper pairing mechanism of heavy fermion superconductivity in CeCoIn5
J Van Dyke, F Massee, MP Allan, JC Davis, C Petrovic, and DK Morr
PNAS 111, 11663 (2014)
Imaging Cooper pairing of heavy fermions in CeCoIn5
MP Allan* & F Massee*, DK Morr, J van Dyke, AW Rost, AP Mackenzie, C Petrovic, JC Davis
Nature Physics 9, 468 (2013)
Formation of heavy d-electron quasiparticles in Sr3Ru2O7
MP Allan, A Tamai, E Rozbicki, MH Fischer, J Voss, PDC King, W Meevasana, S Thirupathaiah, E Rienks, J Fink, A Tennant, RS Perry, JF Mercure, MA Wang, J Lee, CJ Fennie, E-A Kim, MJ Lawler, KM Shen, AP Mackenzie, Z-X Shen, F Baumberger
New Journal of Physics 15, 063029 (2013)
Anisotropic impurity states, quasiparticle scattering and nematic transport in underdoped Ca(Fe1−xCox)2As2
MP Allan, T-M Chuang, F Massee, Y Xie, N Ni, SL Bud’ko, GS Boebinger, Q Wang, DS Dessau, PC Canfield, MS Golden, JC Davis
Nature Physics 9, 220 (2013)
Anisotropic energy gaps of iron-based superconductivity from intraband quasiparticle interference in LiFeAs
MP Allan⋆ & AW Rost⋆, AP Mackenzie, Y Xie, JC Davis, K Kihou, CH Lee, A Iyo, H Eisaki, T-M Chuang
Science 336, 563 (2012)
How Kondo-holes create intense nanoscale heavy-fermion hybridization disorder
MH Hamidian, AR Schmidt, IA Firmo, MP Allan, P Bradley, JD Garrett, TJ Williams, GM Luke, Y Dubi, AV Balatsky, JC Davis
PNAS 108, 18233 (2011)
Nematic electronic structure in the “parent” state of the iron-based superconductor Ca(Fe1−xCox)2As2
T-M Chuang* & MP Allan*, J Lee, Y Xie, N Ni, SL Bud’ko, GS Boebinger PC Canfield, JC Davis
Science 327, 181 (2010)
Heavy d-electron quasiparticle interference and real-space electronic structure of Sr3Ru2O7
Jinho Lee* & M. P. Allan*, M. A.Wang, J. Farrell, S. A. Grigera, F. Baumberger, J. C. Davis and A. P. Mackenzie
Nature Physics 5, 800 (2009)
Fermi surface and van Hove singularities in the itinerant metamagnet Sr3Ru2O7
A Tamai, MP Allan, JF Mercure, W Meevasana, R Dunkel, DH Lu, RS Perry, AP Mackenzie, David J Singh, Z-X Shen, F Baumberger
Phys. Rev. Lett. 101, 026407 (2008)
Tunable self-assembly of one-dimensional nanostructures with orthogonal directions
MP Allan, S Berner, M Corso, T Greber, J Osterwalder
Nanoscale Research Letters 2, 94 (2007)
Photoelectron Diffraction for a Look inside Nanostructures
J Osterwalder, A Tamai, W Auwärter; MP Allan, T Greber
CHIMIA 11, 759 (2006)