Jeffrey McCallum

In situ amplification of spin echoes within a kinetic inductance parametric amplifier.

Wyatt Vine, Mykhailo Savytskyi, Arjen Vaartjes, Anders Kringhøj, Daniel Parker, James Slack-Smith, Thomas Schenkel, Klaus Mølmer, Jeffrey C McCallum, Brett C Johnson, Andrea Morello, Jarryd J Pla

Journal article  |  2023  |  Sci Adv

The use of superconducting microresonators together with quantum-limited Josephson parametric amplifiers has enhanced the sensitiv..

Observing Er3 Sites in Si With an In Situ Single-Photon Detector

Ian R Berkman, Alexey Lyasota, Gabriele G de Boo, John G Bartholomew, Brett C Johnson, Jeffrey C McCallum, Bin-Bin Xu, Shouyi Xie, Rose L Ahlefeldt, Matthew J Sellars, Chunming Yin, Sven Rogge

Journal article  |  2023  |  PHYSICAL REVIEW APPLIED

We present a flexible method to study the optical properties of an Er3+ ensemble in Si accessed via resonant excitation and in sit..

Silicon-Aluminum Phase-Transformation-Induced Superconducting Rings

Brett C Johnson, Michael Stuiber, Daniel L Creedon, Manjith Bose, Amanuel Berhane, Laurens Henry Willems van Beveren, Sergey Rubanov, Jared H Cole, Vincent Mourik, Alexander R Hamilton, Timothy L Duty, Jeffrey Colin McCallum

Journal article  |  2022  |  NANO LETTERS

The development of devices that exhibit both superconducting and semiconducting properties is an important endeavor for emerging q..

P-Type Ohmic Contact to Monolayer WSe2 Field-Effect Transistors Using High-Electron Affinity Amorphous MoO3

Yi-Hsun Chen, Kaijian Xing, Song Liu, Luke N Holtzman, Daniel L Creedon, Jeffrey C McCallum, Kenji Watanabe, Takashi Taniguchi, Katayun Barmak, James Hone, Alexander R Hamilton, Shao-Yu Chen, Michael S Fuhrer

Journal article  |  2022  |  ACS APPLIED ELECTRONIC MATERIALS

Monolayer tungsten diselenide (1L-WSe2) has been widely used for studying emergent physics due to the unique properties of its val..

Nanoscale Mapping of Sub-Gap Electroluminescence from Step-Bunched, Oxidized 4H-SiC Surfaces

Natalia Alyabyeva, Jacques Ding, Mylene Sauty, Judith Woerle, Yann Jousseaume, Gabriel Ferro, Jeffrey C McCallum, Jacques Peretti, Brett C Johnson, Alistair CH Rowe

Journal article  |  2022  |  PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS

Scanning tunneling luminescence microscopy (STLM) and scanning tunneling spectroscopy (STS) are used to study step-bunched, oxidiz..

Spectral Broadening of a Single Er3 Ion in a Si Nanotransistor

Jiliang Yang, Jian Wang, Wenda Fan, Yangbo Zhang, Changkui Duan, Guangchong Hu, Gabriele G de Boo, Brett C Johnson, Jeffrey C McCallum, Sven Rogge, Chunming Yin, Jiangfeng Du

Journal article  |  2022  |  PHYSICAL REVIEW APPLIED

Single rare-earth ions in solids show great potential for quantum applications, including single-photon emission, quantum computin..

Zeeman and hyperfine interactions of a single Er-167(3 ) ion in Si

Jiliang Yang, Wenda Fan, Yangbo Zhang, Changkui Duan, Gabriele G de Boo, Rose L Ahlefeldt, Jevon J Longdell, Brett C Johnson, Jeffrey C McCallum, Matthew J Sellars, Sven Rogge, Chunming Yin, Jiangfeng Du

Journal article  |  2022  |  PHYSICAL REVIEW B

Er-doped Si is a promising candidate for quantum information applications due to its telecom wavelength optical transition and its..

High-field magnetotransport studies of surface-conducting diamonds

Kaijian Xing, Daniel L Creedon, Golrokh Akhgar, Steve A Yianni, Jeffrey C McCallum, Lothar Ley, Dong-Chen Qi, Christopher Pakes

Journal article  |  2022  |  PHYSICAL REVIEW B

The observation of a strong and tunable spin-orbit interaction (SOI) in surface-conducting diamond opens up a new avenue for build..

Valley population of donor states in highly strained silicon

B Voisin, KSH Ng, J Salfi, M Usman, JC Wong, A Tankasala, BC Johnson, JC McCallum, L Hutin, B Bertrand, M Vinet, N Valanoor, MY Simmons, R Rahman, LCL Hollenberg, S Rogge

Journal article  |  2022  |  Materials for Quantum Technology

Abstract Strain is extensively used to controllably tailor the electronic properties of materials. In the context o..

Hydrogen-Terminated Diamond MOSFETs Using Ultrathin Glassy Ga2O3 Dielectric Formed by Low-Temperature Liquid Metal Printing Method

Kaijian Xing, Patjaree Aukarasereenont, Sergey Rubanov, Ali Zavabeti, Daniel L Creedon, Wei Li, Brett C Johnson, Christopher Pakes, Jeffrey C McCallum, Torben Daeneke, Dong-Chen Qi

Journal article  |  2022  |  ACS APPLIED ELECTRONIC MATERIALS

The p-type surface conductivity of hydrogen-terminated diamond (H-diamond) provides a viable approach toward diamond-based wide-ba..