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Publications

An algorithm for subtraction of doublet emission lines in angle-resolved photoemission spectroscopy

Cornell Affiliated Author(s)
Author
Y. Tarn
M. Sinha
C. Pasco
D.G. Schlom
T.M. McQueen
K.M. Shen
B.D. Faeth
Abstract

Plasma discharge lamps are widely utilized in the practice of angle-resolved photoemission spectroscopy (ARPES) experiments as narrow-linewidth ultraviolet photon sources. However, many emission lines such as Ar-I, Ne-I, and Ne-II have closely spaced doublet emission lines, which result in superimposed replica on the measured ARPES spectra. Here, we present a simple method for subtracting the contribution of these doublet emission lines from photoemission spectra.

Journal
Journal of Electron Spectroscopy and Related Phenomena
Date Published
Funding Source
2039380
Group (Lab)
Kyle Shen Group

Giant spin Hall effect in AB-stacked MoTe2/WSe2 bilayers

Cornell Affiliated Author(s)
Author
Z. Tao
B. Shen
W. Zhao
N.C. Hu
T. Li
S. Jiang
L. Li
K. Watanabe
T. Taniguchi
A.H. MacDonald
J. Shan
K.F. Mak
Abstract

The spin Hall effect (SHE), in which an electrical current generates a transverse spin current, plays an important role in spintronics for the generation and manipulation of spin-polarized electrons. The phenomenon originates from spin–orbit coupling. In general, stronger spin–orbit coupling favours larger SHEs but shorter spin relaxation times and diffusion lengths. However, correlated magnetic materials often do not support large SHEs.

Journal
Nature Nanotechnology
Date Published
Funding Source
DMR-1719875
DMR-1807810
DMR-2039380
FA9550-19-1-0390
NNCI-2025233
DE-SC0019481
JPMJCR15F3
Group (Lab)
Jie Shan Group
Kin Fai Mak Group

Remote imprinting of moiré lattices

Author
J. Gu
J. Zhu
P. Knuppel
K. Watanabe
T. Taniguchi
J. Shan
K.F. Mak
Abstract

Two-dimensional moiré materials are formed by overlaying two layered crystals with small differences in orientation or/and lattice constant, where their direct coupling generates moiré potentials. Moiré materials have emerged as a platform for the discovery of new physics and device concepts, but while moiré materials are highly tunable, once formed, moiré lattices cannot be easily altered. Here we demonstrate the electrostatic imprinting of moiré lattices onto a target monolayer semiconductor.

Journal
Nature Materials
Date Published
Funding Source
DMR-2114535
NNCI-2025233
FA9550-18-1-0480
JPMJCR15F3
Group (Lab)
Jie Shan Group
Kin Fai Mak Group

Resonant Ultrasound Spectroscopy for Irregularly Shaped Samples and Its Application to Uranium Ditelluride

Author
Gregorio Simarro
Avi Shragai
Gael Grissonnanche
Ian Hayes
Shanta Saha
Tatsuya Shishidou
Taishi Chen
Satoru Nakatsuji
Sheng Ran
Michael Weinert
Nicholas Butch
Johnpierre Paglione
B. Ramshaw
Abstract

Resonant ultrasound spectroscopy (RUS) is a powerful technique for measuring the full elastic tensor of a given material in a single experiment. Previously, this technique was practically limited to regularly shaped samples such as rectangular parallelepipeds, spheres, and cylinders [W. M. Visscher et al. J. Acoust. Soc. Am. 90, 2154 (1991)].

Journal
PHYSICAL REVIEW LETTERS
Date Published
Funding Source
DE-SC0020143
S10OD012287
DMR-1719875
DE-SC-0019154
GBMF9071
Group (Lab)
Brad Ramshaw Group

ZrNb(CO) RF Superconducting Thin Film with High Critical Temperature in the Theoretical Limit

Cornell Affiliated Author(s)
Author
Z. Sun
T. Oseroff
Z. Baraissov
D.K. Dare
K. Howard
B. Francis
A.C. Hire
N. Sitaraman
T.A. Arias
M.K. Transtrum
R. Hennig
M.O. Thompson
D.A. Muller
M.U. Liepe
Abstract

Superconducting radio-frequency (SRF) resonators are critical components for particle accelerator applications, such as free-electron lasers, and for emerging technologies in quantum computing. Developing advanced materials and their deposition processes to produce RF superconductors that yield nΩ surface resistances is a key metric for the wider adoption of SRF technology. Here, ZrNb(CO) RF superconducting films with high critical temperatures (Tc) achieved for the first time under ambient pressure are reported.

Journal
Advanced Electronic Materials
Date Published
Funding Source
NNCI‐2025233
PHY‐1549132
DMR‐1719875
Group (Lab)
Tomas Arias Group

Machine learning reveals features of spinon Fermi surface

Cornell Affiliated Author(s)
Author
Kevin Zhang
Shi Feng
Yuri Lensky
Nandini Trivedi
Eun-Ah Kim
Abstract

With rapid progress in simulation of strongly interacting quantum Hamiltonians, the challenge in characterizing unknown phases becomes a bottleneck for scientific progress. We demonstrate that a Quantum-Classical hybrid approach (QuCl) of mining sampled projective snapshots with interpretable classical machine learning can unveil signatures of seemingly featureless quantum states.

Journal
communications physics
Date Published
Funding Source
EAGER OSP-136036
PGS-D-557580-2021
GBMF10436
OAC-2118310
EAGER OSP-136036
Ewha Frontier 10-10 Research Grant
920665
DMR-2011876
NSF-DMR 2138905
Group (Lab)
Eun-Ah Kim Group

Ultrafast radiographic imaging and tracking: An overview of instruments, methods, data, and applications

Cornell Affiliated Author(s)
Author
Z. Wang
A.F.T. Leong
A. Dragone
A.E. Gleason
R. Ballabriga
C. Campbell
M. Campbell
S.J. Clark
C. Da Vià
D.M. Dattelbaum
M. Demarteau
L. Fabris
K. Fezzaa
E.R. Fossum
S.M. Gruner
T.C. Hufnagel
X. Ju
K. Li
X. Llopart
B. Lukić
A. Rack
J. Strehlow
A.C. Therrien
J. Thom-Levy
F. Wang
T. Xiao
M. Xu
X. Yue
Abstract

Ultrafast radiographic imaging and tracking (U-RadIT) use state-of-the-art ionizing particle and light sources to experimentally study sub-nanosecond transients or dynamic processes in physics, chemistry, biology, geology, materials science and other fields.

Journal
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Date Published
Group (Lab)
Sol M. Gruner Group

Bragg glass signatures in PdxErTe3 with X-ray diffraction temperature clustering

Cornell Affiliated Author(s)
Author
Krishnanand Mallayya
Joshua Straquadine
Matthew Krogstad
Maja Bachmann
Anisha Singh
Raymond Osborn
Stephan Rosenkranz
Ian Fisher
Eun-Ah Kim
Abstract

The Bragg glass phase is a nearly perfect crystal with glassy features predicted to occur in vortex lattices and charge-density-wave systems in the presence of disorder. Detecting it has been challenging, despite its sharp theoretical definition in terms of diverging correlation lengths. Here we present bulk probe evidence supporting a Bragg glass phase in the systematically disordered charge-density-wave material of PdxErTe3. We do this by using comprehensive X-ray data and a machine-learning-based analysis tool called X-ray diffraction temperature clustering (X-TEC).

Journal
Nature Physics
Date Published
Funding Source
DE-SC0018946
GBMF10436
DE-AC02-76SF00515
Group (Lab)
Eun-Ah Kim Group

Cell-Derived Vesicles with Increased Stability and On-Demand Functionality by Equipping Their Membrane with a Cross-Linkable Copolymer

Cornell Affiliated Author(s)
Author
X. Huang
D. Hürlimann
H.T. Spanke
D. Wu
M. Skowicki
I.A. Dinu
E.R. Dufresne
C.G. Palivan
Abstract

Cell-derived vesicles retain the cytoplasm and much of the native cell membrane composition. Therefore, they are attractive for investigations of membrane biophysics, drug delivery systems, and complex molecular factories. However, their fragility and aggregation limit their applications. Here, the mechanical properties and stability of giant plasma membrane vesicles (GPMVs) are enhanced by decorating them with a specifically designed diblock copolymer, cholesteryl-poly[2-aminoethyl methacrylate-b-poly(ethylene glycol) methyl ether acrylate].

Journal
Advanced Healthcare Materials
Date Published
Research Area
Group (Lab)
Eric Dufresne Group

Elastic microphase separation produces robust bicontinuous materials

Cornell Affiliated Author(s)
Author
C. Fernández-Rico
S. Schreiber
H. Oudich
C. Lorenz
A. Sicher
T. Sai
V. Bauernfeind
S. Heyden
P. Carrara
L.D. Lorenzis
R.W. Style
E.R. Dufresne
Abstract

Bicontinuous microstructures are essential to the function of diverse natural and synthetic systems. Their synthesis has been based on two approaches: arrested phase separation or self-assembly of block copolymers. The former is attractive for its chemical simplicity and the latter, for its thermodynamic robustness. Here we introduce elastic microphase separation (EMPS) as an alternative approach to make bicontinuous microstructures. Conceptually, EMPS balances the molecular-scale forces that drive demixing with large-scale elasticity to encode a thermodynamic length scale.

Journal
Nature Materials
Date Published
Group (Lab)
Eric Dufresne Group