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Highlights

Research achievements from the NSF MIP community.

Research Highlights

Figure 1: a) Magneto-resistance showing quantum oscillations in the insulating state and metallic state, respectively. Inset shows derivative. b) Insulating state quantum oscillations have a field-independent frequency of 740 ± 60 T and metallic state quantum oscillations have a field-dependent frequency (H ∥ [100]). Lines are guides for the eye. All measurements at ≈ 650 mK. c) Schematic of the formation of Landau levels and approaching the normal and reverse quantum limit. d) Categorization of possible high magnetic field behaviors as a function of gap and normalized g-factor.
Feb 21, 2024
Cornell University

Resolving Quantum Oscillations in Insulating YbB12

C.A. Mizzi, M.K. Chan, Neil Harrison, P.F. S. Rosa, and W.A. Phelan (Los Alamos National Laboratory), and S. Kushwaha, L. Pressley, and T.M. McQueen (Johns Hopkins University)
Here, users from Los Alamos National Lab together with PARADIM propose that the strongly correlated quantum limit can be approached in reverse, starting from an insulating state at zero magnetic field. The identified candidate material, ytterbium boride (YbB12), was grown in single crystal form at PARADIM and studied in high magnetic fields at the NHMFL@LANL. The results not only provide access to a novel quantum phase of matter, but also provide a model that naturally explains how quantum oscillations arise in insulators.
Above (a): HRTEM image of a FeTe/(Cr.Bi.Sb)2Teg heterostructure. (b) ARPES spectrum of the sample shown in (a). (c) Resistance versus temperature in 3 samples, showing a superconducting transition. (d) RMCD measurements showing the presence of ferromagnetism in a heterostructure even in the superconducting phase.
Feb 8, 2024
Pennsylvania State University

Emergent interfacial superconductivity at the interface of topology and magnetism

Hemian Yi, Yi-Fan Zhao, Ruobing Mei, Zi-Jie Yan, Ling-Jie Zhou, Ruoxi Zhang, Zihao Wang, Stephen Paolini,, Ke Wang, Moses H. W. Chan (Penn State); Run Xiao, Anthony R. Richardella, Nitin Samarth, Chaoxing Liu, Cuizu Chang (2DCC-MIP Penn State)
Heterogeneous interfaces that juxtapose different materials have been known to create emergent quantum phenomena. We used molecular beam epitaxy to synthesize heterostructures formed by stacking together two magnetic materials, a ferromagnetic topological insulator (Cr,Bi,Sb)2Te3) and an antiferromagnetic metal, iron chalcogenide (FeTe).
Three-dimensional integration of two-dimensional field-effect transistors
Jan 10, 2024
Pennsylvania State University

Three-dimensional integration of two-dimensional field-effect transistors

D. Jayachandran, R. Pendurthi, M.U.K Sadaf, N.U. Sakib, A. Pannone, Y. Han, S. Das, Y. Yang, (Penn State); C. Chen, N. Trainor, S. Kumari, T.V. Mc Knight and J.M. Redwing (2DCC-MIP, Penn State)
With the escalating costs of developing and manufacturing integrated circuit (IC) chips, methods to vertically stack devices are being thoroughly explored.
Low-Frequency Raman Study of Large-Area Twisted Bilayers of WS_2 Stacked by an Etchant-Free Transfer Method
Jan 3, 2024
Pennsylvania State University

Low-Frequency Raman Study of Large-Area Twisted Bilayers of WS_2 Stacked by an Etchant-Free Transfer Method

Manpreet Boora, Jae Yong Suh (Michigan Tech); Yu-Chuan Lin (Penn State, NYCU); Chen Chen, Nicholas Trainor, Joshua A. Robinson, Joan M. Redwing (Penn State, 2DCC-MIP)
In this work, we developed an efficient transfer method for fabricating bilayers of WS2 with a controlled twist angle.
GlycoMIP introduces STEM teachers to glycan modeling tool
Jan 1, 2024
Virginia Polytechnic Institute and State University

GlycoMIP introduces STEM teachers to glycan modeling tool

Maren Roman, Virginia Tech, Robert J. Woods, University of Georgia
As part of its outreach mission, GlycoMIP provided education about glycomaterials to high-school STEM teachers through the Teacher Enrichment Program of the Center for Excellence in Education
Efficient thermally generation of a spin current in a topological insulator
Dec 13, 2023
Pennsylvania State University

Efficient thermally generation of a spin current in a topological insulator

Rakshit Jain, Arnab Bose, Xiyue Zhang, David Muller, Daniel C. Ralph (Cornell University); Max Stanley, Anthony Richardella, Tim Pillsbury, Nitin Samarth (2DCC-MIP, Penn State)
This project studied the thermal generation of spin current in the topological insulator Bi2Se3, thereby completing measurements of interconversions among the full triad of thermal gradients, charge currents, and spin currents.
Modular design of 3-arm block copolypeptide enables tunable microstructure and properties based on amino acid selection.
Dec 13, 2023
University of California, Santa Barbara

Tailoring Writability and Performance of Star Block Copolypeptides Hydrogels through Side-Chain Design

Juan Manuel Urueña, Matthew E. Helgeson, Christopher M. Bates, Craig J. Hawker, Javier Read de Alaniz, UC Santa Barbara
Synthesis and characterization of shear-recoverable hydrogels based on 3-arm star-shaped block copolypeptides.
Nonvolatile Memristive Effect in Few Layer CrI3 Driven by Electrostatic Gating
Dec 11, 2023
Pennsylvania State University

Nonvolatile Memristive Effect in Few Layer CrI3 Driven by Electrostatic Gating

ZhuangEn Fu, Piumi I. Samarawickrama, Wenyong Wang, Jinke Tang, John Ackerman, and Jifa Tian (U Wyoming, 2DCC User), Kenji Watanabe, Takashi Taniguchi (NIMS, Japan), Yanglin Zhu, Zhiqiang Mao (2DCC-MIP, Penn)
The potential of memristive devices for applications in nonvolatile memory and neuromorphic computing has sparked considerable interest, particularly in exploring memristive effects in two-dimensional (2D) magnetic materials.
Single-molecule stretching experiments investigate how the force(f) –extension (L) relationship is affected by the spacing of charges on the polypeptoid conformation. Sequences contain 2 types of monomers: hydrophilic and uncharged N-methoxyethyl (Nme) glycine (black circle), and negatively charged Nce glycine (red circle).
Oct 27, 2023
University of California, Santa Barbara

Single-Molecule Polypeptoid Stretching Reveals the Effects of Charge Sequence on Chain Conformation

Hoang P. Truong, Shawn Mengel, Rachel A. Segalman, and Omar A. Saleh, UC Santa Barbara
Through single-molecule stretching experiments, the study investigated the impact of charge spacing on polypeptoid conformation with sequences containing either negatively charged or hydrophilic and uncharged monomers.
Atomic structures and interfacial engineering of ultrathin indium intercalated between graphene and a SiC substrate
Sep 8, 2023
Pennsylvania State University

Atomic structures and interfacial engineering of ultrathin indium intercalated between graphene and a SiC substrate

Two-dimensional metals stabilized at the interface between graphene and SiC are attracting considerable interest thanks to their intriguing physical properties, providing promising material platforms for quantum technologies.

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