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Symposium EQ07-Defects and Strain Potential Enabled Emergent Behavior in Two-Dimensional Materials

Strain and defect are effective means to achieve versatile functionalities in materials. Due to their weak interlayer coupling, several physical properties of van der Waals (vdW) solids show high sensitivity to strain modulation, e.g. bandgap change and phonon spectra shift. Recently, the moiré superlattice and the atomic reconstruction were observed under periodic strain potential, which can lead to some emergent and intriguing properties, such as unconventional superconductivity and unique optoelectronic behaviors. Strain tuning of 2D materials is not limited by mechanical stretching/bending approach, wrinkling/crumpling of 2D materials or transferring onto patterned substrates. The hydrostatic compressive strain generated in a diamond anvil cell can reach to more than 10%, making possible the study of phenomena under extremely nonequilibrium conditions. Rich forms of defects are present in 2D materials, such as foreign atoms, wrinkles, grain boundaries, etc. Besides as carrier traps and/or recombination center, recent discoveries suggest that defects can also serve as quantum emitters or spin trappers, and enable new quantum phenomena such as hydrodynamic electron transport.

This symposium will cover a broad range of emergent properties in 2D materials enabled by strain and defect, including thermal, optical, electrical, magnetic properties, enabling the applications for electronics, plasmonics, spintronics, straintronics and valleytronics. The materials will include not only graphitic materials, transition metal dichalcogenides, but also some emerging families of ferromagnetic materials.

Topics will include:

  • Experimental investigation of thermal, electrical, optical and magnetic properties of 2D materials under strain
  • Theoretical and computational predictions of thermal, electrical, optical and magnetic transport of emerging 2D materials under strain
  • Emergence of new phases under extreme strain
  • Straintronics - Engineering 2D electronics through strain
  • Quantum defects in 2D materials
  • Defect-engineered 2D electronics
  • Reconstructed moiré and soliton effects in 2D materials
  • Emergent/collective behavior with periodic strain potential modulation
  • Emerging applications of defect and strain potential engineered 2D materials in clean energy, environment, and advanced health care, etc.
  • New physics and properties associated with interfacial defect and strain engineering, including intercalation, adhesion, encapsulation, superlubricity, van der Waals confinement for chemical reaction, etc.
  • A tutorial complementing this symposium is tentatively planned.

Invited Speakers:

  • Vikas Berry (University of Illinois at Chicago, USA)
  • Corey Dean (Columbia University, USA)
  • Hui Deng (University of Michigan, USA)
  • Andrea Ferrari (University of Cambridge, United Kingdom)
  • Dorri Halbertal (Columbia University, USA)
  • Han Htoon (Los Alamos National Laboratory, USA)
  • Pinshane Huang (University of Illinois at Urbana-Champaign, USA)
  • Philip Kim (Harvard University, USA)
  • Chun Ning (Jeanie) Lau (The Ohio State University, USA)
  • Xiaoqin Li (The University of Texas at Austin, USA)
  • Nanshu Lu (The University of Texas at Austin, USA)
  • Nadya Mason (University of Illinois at Urbana-Champaign, USA)
  • Feng Miao (Nanjing University, China)
  • Kayla Nguyen (Cornell University, USA)
  • Ruth Pachter (Air Force Research Laboratory, USA)
  • Tereza Porozova (HeXalayer, LLC, USA)
  • Matthew Rosenberger (University of Notre Dame, USA)
  • Siddharth Saxena (University of Cambridge, United Kingdom)
  • Qing Hua Wang (Arizona State University, USA)
  • Yaguo Wang (The University of Texas at Austin, USA)
  • Yan Wang (University of Nevada, Reno, USA)
  • Nai-Chang Yeh (California Institute of Technology, USA)

Symposium Organizers

Feng He
Harbin Institute of Technology, Shenzhen
State Key Laboratory on Tunable Laser Technology, School of Electronics and Information Engineering

SungWoo Nam
University of California, Irvine
Department of Mechanical and Aerospace Engineering

Michael T. Pettes
Los Alamos National Laboratory
Materials Physics & Applications Division – Center for Integrated Nanotechnologies

Qing Tu
Texas A&M University
Department of Materials Science & Engineering

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