IRGs

In collaboration with Marks and Prof. Alex K. -Y. Jen group (U. Washington), the Ho group has, for the first time, successfully demonstrated a novel organic EO modulator using ZnO and In2O3 as TCO electrodes and device geometry designs. This helped achieve 2.8V switching voltage for a 8mm-long device at wavelength of 1.31μm, which corresponding […]

The interdisciplinary research group on Ferroelectric Photonic Materials seeks to combine the geometric opportunities to localize light in photonic crystals via microfabrication with the inherent material complexities of ferroelectric materials to obtain unprecedented ability to manipulate light. Through use of electromagnetic simulation-based optical design, state-of-the-art photonic crystal fabrication, microscale electromechanical modeling, and ferroelectric film synthesis, […]

This Seed project on Spin and Charge Quantum Transport in Organic/Magnetic Heterostructures for Spintronics and Optoelectronics center on optimizing the spintronic and optoelectronic properties of organic semiconductor/ ferromagnetic heterostructures focusses on fabricating macroscopic organic semiconductor/ferromagnetic heterostructures. This is complemented by microscopic heterostructure characterization by cryogenic scanning tunneling microscopy combined with near-field scanning optical microscopy.

This IRG focuses on the science and engineering of magnetoelectronics. The interplay of materials, nanostructures, and architectures that are essential for spintronics research necessitates interdisciplinary collaborations between researchers with complementary expertise. Nanostructures are a key component since the characteristic lengths for spintronic effects are typically one to few tens of nanometers. Indeed, controlling architecture within […]

The Yale University CRISP IRG examines complex metal oxide systems and their solid-solid and solid-gas interfaces in order to discover and understand new phenomena and to explore innovative applications for modern electronics and surface chemistry. We consider both the atomic-scale growth and the structural properties of these interfaces, as well as their macroscopic, functional […]

Controlling Electrons at Interfaces
IRG Senior Participants:
Hector Abruña (C&CB, co-leader), Dan Ralph (Phys, co-leader), Piet Brouwer (Phys), Robert Buhrman (A&EP), J. C. Séamus Davis (Phys), Paul McEuen (Phys), David Muller (A&EP), Sandip Tiwari (ECE), R. Bruce van Dover (MS&E)
Collaborators: G. Coates (Cornell); W. Harneit (Freie Universität Berlin); C. W. Kim, M. K. Kim (Samsung […]

Dynamics of Growth of Complex Materials
IRG Senior Participants:
George Malliaras (MS&E, co-leader), David Muller (A&EP, co-leader), Tomás Arias (Phys), Jack Blakely (MS&E), Joel D. Brock (A&EP), Paulette Clancy (C&BE), James R. Engstrom (C&BE),
Collaborators: J. Anthony (U. Kentucky), D. Bowler (Univ. Coll. London), D. Dale (CHESS), R. Headrick (U. Vermont), A. Kazimirov (CHESS), H. […]

The last decade has witnessed considerable progress in the development of organic semiconductors as an alternative to amorphous silicon for low cost, thin film electronics. The attractive properties of organic semiconductors- low temperature processability, efficient electroluminescence, and reasonable charge carrier mobilities- have led to expectations of a new ‘plastic’ electronics with applications ranging from flexible […]

The unifying theme of the Magnetic Heterostructures group (IRG 3) is to achieve a thorough understanding of spin transport, magnetization dynamics, and exchange coupling in materials with precisely defined and well-characterized interfaces, including those with tailored interfacial disorder. Magnetism is the basis for many present, near term, and future technologies, including magnetic read heads and […]

Engineered nanoparticles present a wide range of opportunities for the synthesis and assembly of materials with entirely new electronic, optical or mechanical properties. They are of interest for materials science because their size-dependent characteristics give rise to an entirely new spectrum of materials properties. In addition, nanoparticles offer new ways of forming combinations of very […]

The unifying theme of this IRG is the study of exchange and magnetostatic interactions between particles or grains in nanostructures. Understanding these interactions is a fundamental problem in magnetism and spin electronics and of technological importance in areas such as magnetic recording media, magnetoresistive sensors, and permanent-magnet materials. Since nonlocal, nonlinear, and nonequilibrium effects play […]

Understanding and utilizing spin polarization and transport through nanoscale ordered and disordered interfaces are major goals for future spintronic technologies. We are using original synthetic methods to make nanoscale magnetic materials, for which enhanced spin-transport properties are expected. New ferromagnet/insulator interfaces will be synthesized. In particular, junctions using organic ferroelectric barriers are investigated, as well as ferroelectric/organic ferromagnetic systems.

The research themes of IRG3 focus on the electronic properties of confined systems. Ongoing projects include the study of superconducting and semiconducting nanowires, ferroelectric thin films and a new effort on graphene sheets. These activities are complemented by a synthetic effort in low dimensional nanostructures. This has been a productive year for this IRG with […]

IRG Leader: H. Dennis Drew
This IRG is focused on the science and technology of multiferroic transition metal oxides. In multiferroic materials, magnetism and ferroelectricity coexist. The coupling of these two order parameters provide interesting possibilities of increased functionality. They can exhibit large magnetoelectric and magnetoelastic effects, in which magnetic fields can produce an […]

SEED Leader: Min Ouyang
We are interested in exploring new physics, materials and applications based on the spin degree of freedom of electrons and nuclei within ordered nano-engineered architecture with an emphasis on both development of novel synthetic methodologies for spin-based hybrid organic-inorganic nanostructures and fundamental studies of spin-charge interactions and spin transport within nanostructured […]

IRG1 investigates how magnetism affects electron transport in a broad class of novel materials with unusual magnetic states. The presence of strong interaction between electrons leads to a variety of magnetically ordered states ranging from ferromagnetism, ferrimagnetism, antiferromagnetism, spin density waves, and the spin-Peierls state. Strong interest in how magnetism affects charge transport has come […]

Senior Investigators:
Moungi G. Bawendi (group leader)
Raymond C. Ashoori
Rajeev J. Ram
Leonid S. Levitov
Marc A. Kastner

Research Goals: Modern electronics has provided the foundation for the scientific and technological advances of the last few decades but will soon face serious obstacles that may limit further miniaturization and development. Nanoscale elements, with properties dominated by quantum mechanics, are expected […]

Senior Investigators: J. M. Kikkawa & I.-W. Chen
IRG Leaders; D. A. Bonnell, P. K. Davies, A. M. Rappe, J. M. Vohs
IRG-5 focuses on creating & understanding novel hierarchical interfacial oxide materials. By juxtaposing oxides at various length scales, responsive instabilities appear at their interfaces & give rise to new functionality. This team has expertise in […]

Thrust 1 of IRG1 investigates the physics of spin transport through confined geometries and plans to exploit this understanding to make ultrasensitive magnetic field sensors and magnetic memory and logic devices. During the past year important progress was made in understanding how to optimize the switching of MRAM devices. Thrust 2 explores a fundamentally new […]