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Publications

The Role of Buckling Instabilities in the Global and Local Mechanical Response in Porous Collagen Scaffolds

Cornell Affiliated Author(s)
Author
B. Kim
J.M. Middendorf
N. Diamantides
C. Dugopolski
S. Kennedy
E. Blahut
Itai Cohen
N. Bouklas
L.J. Bonassar
Abstract

Background: Porous polymer scaffolds are commonly used for regenerative medicine and tissue-engineered therapies in the repair and regeneration of structural tissues which require sufficient mechanical integrity to resist loading prior to tissue ingrowth. Objective: Investigate the connection between scaffold architecture and mechanical response of collagen scaffolds used in human tissue-engineered cartilage. Methods: We performed multi-scale mechanical analysis on two types of porous collagen scaffolds with honeycomb and sponge architectures.

Journal
Experimental Mechanics
Date Published
Funding Source
CMMI 2129776
Research Area
Group (Lab)
Itai Cohen Group

Vortex Fermi Liquid and Strongly Correlated Quantum Bad Metal

Cornell Affiliated Author(s)
Author
Nayan Myerson-Jain
Chao-Ming Jian
Cenke Xu
Abstract

The semiclassical description of two-dimensional (2d) metals based on the quasiparticle picture suggests that there is a universal threshold of the resistivity: the resistivity of a 2d metal is bounded by the so called Mott-Ioffe-Regal (MIR) limit, which is at the order of h/e2. If a system remains metallic while its resistivity is beyond the MIR limit, it is referred to as a "bad metal", which challenges our theoretical understanding as the very notion of quasiparticles is invalidated.

Journal
arXiv e-prints
Date Published
Group (Lab)
Chao-Ming Jian Group

What influences students' abilities to critically evaluate scientific investigations?

Cornell Affiliated Author(s)
Author
A.B. Heim
C. Walsh
D. Esparza
M.K. Smith
N.G. Holmes
Abstract

Critical thinking is the process by which people make decisions about what to trust and what to do. Many undergraduate courses, such as those in biology and physics, include critical thinking as an important learning goal. Assessing critical thinking, however, is non-trivial, with mixed recommendations for how to assess critical thinking as part of instruction. Here we evaluate the efficacy of assessment questions to probe students' critical thinking skills in the context of biology and physics.

Journal
PLoS ONE
Date Published
Group (Lab)
Natasha Holmes Group

Heuristic bounds on superconductivity and how to exceed them

Cornell Affiliated Author(s)
Author
J.S. Hofmann
Debanjan Chowdhury
S.A. Kivelson
E. Berg
Abstract

What limits the value of the superconducting transition temperature (Tc) is a question of great fundamental and practical importance. Various heuristic upper bounds on Tc have been proposed, expressed as fractions of the Fermi temperature, TF, the zero-temperature superfluid stiffness, ρs(0), or a characteristic Debye frequency, ω0. We show that while these bounds are physically motivated and are certainly useful in many relevant situations, none of them serve as a fundamental bound on Tc.

Journal
npj Quantum Materials
Date Published
Funding Source
DMR2000987
817799
Group (Lab)
Debanjan Chowdhury Group

Anisotropic Gigahertz Antiferromagnetic Resonances of the Easy-Axis van der Waals Antiferromagnet CrSBr

Cornell Affiliated Author(s)
Author
Thow Cham
Saba Karimeddiny
Avalon Dismukes
Xavier Roy
Daniel Ralph
Yunqiu Luo
Abstract

We report measurements of antiferromagnetic resonances in the van der Waals easy-axis antiferromagnet CrSBr. The interlayer exchange field and magnetocrystalline anisotropy fields are comparable to laboratory magnetic fields, allowing a rich variety of gigahertz-frequency dynamical modes to be accessed. By mapping the resonance frequencies as a function of the magnitude and angle of applied magnetic field, we identify the different regimes of antiferromagnetic dynamics.

Journal
American Chemical Society (ACS)
Date Published
Funding Source
DMR-1719875
DMR-2104268
NNCI-2025233
DE-SC0019443
FA9550-19-1-0390

The effect of surface-active statistical copolymers in low-energy miniemulsion and RAFT polymerization

Cornell Affiliated Author(s)
Author
M. Rolland
E.R. Dufresne
N.P. Truong
A. Anastasaki
Abstract

Low-energy miniemulsions enable the production of uniform nanodroplets for a wide range of applications without the need for using specialized equipment. However, low-energy miniemulsions are typically formed in the presence of a surface-active agent with a specific structure and property.

Journal
Polymer Chemistry
Date Published
Funding Source
DE180100076
DP200100231
Group (Lab)
Eric Dufresne Group

Engineered dissipation for quantum information science

Cornell Affiliated Author(s)
Author
P.M. Harrington
E.J. Mueller
K.W. Murch
Abstract

Quantum information processing relies on the precise control of non-classical states in the presence of many uncontrolled environmental degrees of freedom. The interactions between the relevant degrees of freedom and the environment are often viewed as detrimental, as they dissipate energy and decohere quantum states. Nonetheless, when controlled, dissipation is an essential tool for manipulating quantum information: dissipation engineering enables quantum measurement, quantum-state preparation and quantum-state stabilization.

Journal
Nature Reviews Physics
Date Published
Funding Source
PHY-1752844
PHY-2110250

Programming interactions in magnetic handshake materials

Cornell Affiliated Author(s)
Author
C.X. Du
H.A. Zhang
T.G. Pearson
J. Ng
P.L. McEuen
Itai Cohen
M.P. Brenner
Abstract

The ability to rapidly manufacture building blocks with specific binding interactions is a key aspect of programmable assembly. Recent developments in DNA nanotechnology and colloidal particle synthesis have significantly advanced our ability to create particle sets with programmable interactions, based on DNA or shape complementarity. The increasing miniaturization underlying magnetic storage offers a new path for engineering programmable components for self assembly, by printing magnetic dipole patterns on substrates using nanotechnology.

Journal
Soft Matter
Date Published
Funding Source
DMR-1921567
DMR-1921619
137070-20834
N00014-17-1-3029
DMR-1719875
Research Area
Group (Lab)
J.C. Seamus Davis Group
Paul McEuen Group

Conversion Between 3 He Melting Curve Scales Below 100 mK

Cornell Affiliated Author(s)
Author
Y. Tian
E. Smith
J. Parpia
Abstract

We provide the conversion parameters to allow a 3He melting curve thermometer to be used to calibrate secondary thermometers to the PLTS2000 temperature scale (Rusby et al. in J Low Temp Phys 149(3):156, 2007). Additional fits to the phase diagram of superfluid 3He are also provided using the melting curve P, T measurements and of the phase diagram of superfluid 3He (Greywall in Phys Rev B 33(11):7520, https://doi.org/10.1103/PhysRevB.33.7520, 1986) as a bridge.

Journal
Journal of Low Temperature Physics
Date Published
Funding Source
DMR-2002692
Group (Lab)
Jeevak Parpia Group