Javier Sanchez-Yamagishi

Assistant Professor of Physics and Astronomy UC Irvine

  • Irvine CA

Javier Sanchez-Yamagishi is an experimental physicist who discovers new approaches to quantum physics for the development of new devices.

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UC Irvine

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Biography

The Sanchez-Yamagishi lab seeks to discover new funky quantum behaviors for electrons that have no counterpart in the world of classical physics. Their strategy is to design strange landscapes for the electrons to live in and then observe how they behave and interact with their neighbors. To accomplish this, they use advanced nanofabrication techniques as well as electronic, optical, and magnetic characterization methods. Their favorite electron playground is 2-dimensional layered materials, where electrons are naturally confined into a 2-dimensional plane and quantum effects are more apparent. They also explore the use of quantum sensors based on spin qubits in diamond as a probe of electronic physics. Their end goal is to invent new useful quantum devices that manipulate charge, light, heat, spin, and information.

Areas of Expertise

Quantum Devices
Condensed Matter Physics
Electronic Transport
2-dimensional Materials
Nanoscale Magnetometry
Quantum Phenomena
Quantum Computing

Accomplishments

UCI Hellman Fellowship

2024

National Science Foundation Career Award

2021

National Academy of Sciences Kavli Frontiers Fellow

2019

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Education

Massachusetts Institute of Technology

Ph.D.

Physics

2015

Rutgers University

B.S.

Physics

2008

Media Appearances

Metal sheets, ultra-thin feats: are China’s 2D metals the future of electronics?

South China Morning Post  online

2025-03-16

Javier Sanchez-Yamagishi, a specialist in two-dimensional (2D) materials at the University of California, Irvine, said that while the Chinese team was not the first to produce atomically thin metals, their results stood out because the new method produces “large-scale, truly 2D metals” compared to previous techniques.

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Articles

Metals squeezed to thickness of just two atoms

Nature

Javier D. Sanchez-Yamagishi

2025

In contrast to van der Waals materials, metallic elements generally do not have layered structures that can be easily peeled apart. Instead, 2D metals have been prepared in vacuum chambers by spraying a layer of atoms onto a substrate (see refs 6 and 7, for example). Studies of these materials7, 8 have enabled the observation of some of the predicted 2D phenomena. The challenge is that these approaches produce only nanometre-scale irregular ‘islands’ of 2D crystals, which are too small to use in electronic devices. The substrates also cause difficulties by interacting with the 2D metals in ways that prevent the electronic properties of the 2D materials from being properly observed or measured. Zhao and colleagues’ approach resolves many of these challenges.

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Manipulating moires by controlling heterostrain in van der Waals devices

Nano Letters

Ian Sequeira, Andrew Z. Barabas, Aaron H Barajas-Aguilar, Michaela G Bacani, Naoto Nakatsuji, Mikito Koshino, Takashi Taniguichi, Kenji Watanabe & Javier D. Sanchez-Yamagishi

2024

Van der Waals (vdW) moirés offer tunable superlattices that can strongly manipulate electronic properties. We demonstrate the in situ manipulation of moiré superlattices via heterostrain control in a vdW device. By straining a graphene layer relative to its hexagonal boron nitride substrate, we modify the shape and size of the moiré. Our sliding-based technique achieves uniaxial heterostrain values exceeding 1%, resulting in distorted moirés values that are larger than those achievable without strain. The stretched moiré is evident in transport measurements, resulting in shifted superlattice resistance peaks and Landau fans, consistent with an enlarged superlattice unit cell.

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Exceptional electronic transport and quantum oscillations in thin bismuth crystals grown inside van der Waals materials

Nature Materials

Laisi Chen, Amy X. Wu, Naol Tulu, Joshua Wang, Adrian Juanson, Kenji Watanabe, Takashi Taniguchi, Michael T. Pettes, Marshall A. Campbell, Mingjie Xu, Chaitanya A. Gadre, Yinong Zhou, Hangman Chen, Penghui Cao, Luis A. Jauregui, Ruqian Wu, Xiaoqing Pan & Javier D. Sanchez-Yamagishi

2024

Confining materials to two-dimensional forms changes the behaviour of the electrons and enables the creation of new devices. However, most materials are challenging to produce as uniform, thin crystals. Here we present a synthesis approach where thin crystals are grown in a nanoscale mould defined by atomically flat van der Waals (vdW) materials. By heating and compressing bismuth in a vdW mould made of hexagonal boron nitride, we grow ultraflat bismuth crystals less than 10 nm thick. Due to quantum confinement, the bismuth bulk states are gapped, isolating intrinsic Rashba surface states for transport studies.

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