The Search for Novel Superconductors in Moire Flat Bands

The moire heterostructure engineering of 2-dimensional (2D) van der Waals (vdW) materials leads to quantum heterostructures. Utilizing recently demonstrated twisted vdW heteroepitaxy, the investigators will construct vdW homo/hetero structures to realize correlated electronic states that appear in the moire flat bands. With inputs from theory and mathematical modeling of multiscale electronic structure, the project will experimentally investigate multilayer 2D superconducting systems with unusual properties, such as gate tunable transition temperature and non-conventional pairing symmetries. Various material platforms will be explored including twisted double bilayer graphene, twisted trilayer graphene and twisted homo- and hetetro-structures based on transition metal dichalcogenides. Theoretical guidance will be an indispensable part of this study since there are a variety of choices for material platforms and twist angle which cannot be covered by experiment alone without targeted modeling guide. Unconventional superconductivity can also lead into the development and discovery of topological superconductors, which can be utilized for quantum computing. The qubits realized in topological superconducting systems hold promise for fault-tolerant quantum computation, thanks to the topological nature of the underlying quantum states.

# Publications

Time-reversal symmetry breaking superconductivity between twisted cuprate superconductors

S. Y. F. Zhao, X. Cui, P. A. Volkov, H. Yoo, S. Lee, J. A. Gardener, A. J. Akey, R. Engelke, Y. Ronen, R. Zhong, G. Gu, S. Plugge, T. Tummuru, M. Kim, M. Franz, J. H. Pixley, N. Poccia, and P. Kim

12/22/2023

Selective manipulation and tunneling spectroscopy of broken-symmetry quantum Hall states in a hybrid-edge quantum point contact

W. Ren, X. Zhang, J. Ma, X. Han, K. Watanabe, T. Taniguchi, and K. Wang

12/22/2023

Modulating the Electrochemical Intercalation of Graphene Interfaces with α-RuCl

_{3}as a Solid-State Electron AcceptorJ. Nessralla, D. T. Larson, T. Taniguchi, K. Watanabe, E. Kaxiras, and D. K. Bediako

11/13/2023

HubbardNet: Efficient predictions of the Bose-Hubbard model spectrum with deep neural networks

Z. Zhu, M. Mattheakis, W. Pan, and E. Kaxiras

10/26/2023

One-Dimensional Moiré Physics and Chemistry in Heterostrained Bilayer Graphene

G. R. Schleder, M. Pizzochero, and E. Kaxiras

9/27/2023

Theory of polarization textures in crystal supercells

D. Bennett, W. J. Jankowski, G. Chaudhary, E. Kaxiras, and R. Slager

9/26/2023

Topology of rotating stratified fluids with and without background shear flow

Z. Zhu, C. Li, and J. B. Marston

9/15/2023

Edge State Dynamics Along Curved Interfaces

G. Bal, S. Becker, A. Drouot, C. F. Kammerer, J. Lu, and A. B. Watson

9/12/2023

Mathematical aspects of the Kubo formula for electrical conductivity with dissipation

A. B. Watson, D. Margetis, and M. Luskin

9/1/2023

Operando electron microscopy investigation of polar domain dynamics in twisted van der Waals homobilayers

K. Ko, A. Yuk, R. Engelke, S. Carr, J. Kim, D. Park, H. Heo, H. Kim, S. Kim, H. Kim, T. Taniguchi, K. Watanabe, H. Park, E. Kaxiras, S. M. Yang, P. Kim, and H. Yoo

6/26/2023

Semiclassical electron and phonon transport from first principles: application to layered thermoelectrics

A. S. Chaves, M. Pizzochero, D. T. Larson, A. Antonelli, and E. Kaxiras

6/21/2023

Lattice Reconstruction in MoSe

_{2}–WSe_{2}Heterobilayers Synthesized by Chemical Vapor DepositionZ. Li, F. Tabataba-Vakili, S. Zhao, A. Rupp, I. Bilgin, Z. Herdegen, B. März, K. Watanabe, T. Taniguchi, G. R. Schleder, A. S. Baimuratov, E. Kaxiras, K. Müller-Caspary, and A. Högele

5/4/2023

Relaxation and Domain Wall Structure of Bilayer Moiré Systems

P. Cazeaux, D. Clark, R. Engelke, P. Kim, and M. Luskin

4/25/2023

Domain-Dependent Surface Adhesion in Twisted Few-Layer Graphene: Platform for Moiré-Assisted Chemistry

V. Hsieh, D. Halbertal, N. R. Finney, Z. Zhu, E. Gerber, M. Pizzochero, E. Kucukbenli, G. R. Schleder, M. Angeli, K. Watanabe, T. Taniguchi, E. Kim, E. Kaxiras, J. Hone, C. R. Dean, and D. N. Basov

4/10/2023

Topological nature of dislocation networks in two-dimensional moiré materials

R. Engelke, H. Yoo, S. Carr, K. Xu, P. Cazeaux, R. Allen, A. M. Valdivia, M. Luskin, E. Kaxiras, M. Kim, J. H. Han, and P. Kim

3/16/2023

Bistritzer–MacDonald dynamics in twisted bilayer graphene

A. B. Watson, T. Kong, A. H. MacDonald, and M. Luskin

3/1/2023

Computing spectral properties of topological insulators without artificial truncation or supercell approximation

M. J. Colbrook, A. Horning, K. Thicke, and A. B. Watson

1/31/2023

Unveiling and Manipulating Hidden Symmetries in Graphene Nanoribbons

N. V. Tepliakov, J. Lischner, E. Kaxiras, A. A. Mostofi, and M. Pizzochero

1/12/2023

Seeing moiré: Convolutional network learning applied to twistronics

D. Liu, M. Luskin, and S. Carr

12/30/2022

Twistronics of Janus transition metal dichalcogenide bilayers

M. Angeli, G. R. Schleder, and E. Kaxiras

12/29/2022

Torsional periodic lattice distortions and diffraction of twisted 2D materials

S. H. Sung, Y. M. Goh, H. Yoo, R. Engelke, H. Xie, K. Zhang, Z. Li, A. Ye, P. B. Deotare, E. B. Tadmor, A. J. Mannix, J. Park, L. Zhao, P. Kim, and R. Hovden

12/19/2022

Modulation Doping of Single-Layer Semiconductors for Improved Contact at Metal Interfaces

Y. Cho, G. R. Schleder, D. T. Larson, E. Brutschea, K. Byun, H. Park, P. Kim, and E. Kaxiras

11/28/2022

Electric field tunable layer polarization in graphene/boron-nitride twisted quadrilayer superlattices

Z. Zhu, S. Carr, Q. Ma, and E. Kaxiras

11/21/2022

Gate-tunable Veselago interference in a bipolar graphene microcavity

X. Zhang, W. Ren, E. Bell, Z. Zhu, K. Tsai, Y. Luo, K. Watanabe, T. Taniguchi, E. Kaxiras, M. Luskin, and K. Wang

11/7/2022

Low-energy moiré phonons in twisted bilayer van der Waals heterostructures

J. Z. Lu, Z. Zhu, M. Angeli, D. T. Larson, and E. Kaxiras

10/10/2022

Out-of-plane thermoelectric performance for
p
-doped GeSe

A. S. Chaves, D. T. Larson, E. Kaxiras, and A. Antonelli

5/6/2022

Orderly disorder in magic-angle twisted trilayer graphene

S. Turkel, J. Swann, Z. Zhu, M. Christos, K. Watanabe, T. Taniguchi, S. Sachdev, M. S. Scheurer, E. Kaxiras, C. R. Dean, and A. N. Pasupathy

4/8/2022

Hydrogen Atoms on Zigzag Graphene Nanoribbons: Chemistry and Magnetism Meet at the Edge

M. Pizzochero, and E. Kaxiras

2/15/2022

Electronic thermal transport measurement in low-dimensional materials with graphene non-local noise thermometry

J. Waissman, L. E. Anderson, A. V. Talanov, Z. Yan, Y. J. Shin, D. H. Najafabadi, M. Rezaee, X. Feng, D. G. Nocera, T. Taniguchi, K. Watanabe, B. Skinner, K. A. Matveev, and P. Kim

11/15/2021

Electrically Induced Dirac Fermions in Graphene Nanoribbons

M. Pizzochero, N. V. Tepliakov, A. A. Mostofi, and E. Kaxiras

10/29/2021

Correlated Insulating States and Transport Signature of Superconductivity in Twisted Trilayer Graphene Superlattices

X. Zhang, K. Tsai, Z. Zhu, W. Ren, Y. Luo, S. Carr, M. Luskin, E. Kaxiras, and K. Wang

10/11/2021

Microscopic origin of the high thermoelectric figure of merit of
n
-doped SnSe

A. S. Chaves, D. T. Larson, E. Kaxiras, and A. Antonelli

9/24/2021

Existence of the first magic angle for the chiral model of bilayer graphene

A. B. Watson, and M. Luskin

9/1/2021

Spectroscopic Signatures of Interlayer Coupling in Janus MoSSe/MoS

_{2}HeterostructuresK. Zhang, Y. Guo, D. T. Larson, Z. Zhu, S. Fang, E. Kaxiras, J. Kong, and S. Huang

8/31/2021

Electric field–tunable superconductivity in alternating-twist magic-angle trilayer graphene

Z. Hao, A. M. Zimmerman, P. Ledwith, E. Khalaf, D. H. Najafabadi, K. Watanabe, T. Taniguchi, A. Vishwanath, and P. Kim

3/12/2021

Dual-Gated Graphene Devices for Near-Field Nano-imaging

S. S. Sunku, D. Halbertal, R. Engelke, H. Yoo, N. R. Finney, N. Curreli, G. Ni, C. Tan, A. S. McLeod, C. F. B. Lo, C. R. Dean, J. C. Hone, P. Kim, and D. N. Basov

2/15/2021

Homogenization of hydrodynamic transport in Dirac fluids

G. Bal, A. Lucas, and M. Luskin

1/1/2021

High-bandwidth, variable-resistance differential noise thermometry

A. V. Talanov, J. Waissman, T. Taniguchi, K. Watanabe, and P. Kim

1/1/2021

Dipole excitation of collective modes in viscous two-dimensional electron systems

V. Andreeva, D. A. Bandurin, M. Luskin, and D. Margetis

11/10/2020

Twisted Trilayer Graphene: A Precisely Tunable Platform for Correlated Electrons

Z. Zhu, S. Carr, D. Massatt, M. Luskin, and E. Kaxiras

9/11/2020

Duality between atomic configurations and Bloch states in twistronic materials

S. Carr, D. Massatt, M. Luskin, and E. Kaxiras

7/29/2020

Image polaritons in boron nitride for extreme polariton confinement with low losses

I. Lee, M. He, X. Zhang, Y. Luo, S. Liu, J. H. Edgar, K. Wang, P. Avouris, T. Low, J. D. Caldwell, and S. Oh

7/20/2020

Modeling mechanical relaxation in incommensurate trilayer van der Waals heterostructures

Z. Zhu, P. Cazeaux, M. Luskin, and E. Kaxiras

6/8/2020

Efficient computation of Kubo conductivity for incommensurate 2D heterostructures

D. Massatt, S. Carr, and M. Luskin

4/1/2020

Modeling and Computation of Kubo Conductivity for Two-Dimensional Incommensurate Bilayers

S. Etter, D. Massatt, M. Luskin, and C. Ortner

1/1/2020

View All Publications

# Research Highlights

Educating High School Students at the Interface of Applied Mathematics and 2D Quantum Physics

P. Kim, E. Kaxiras (Harvard) M. Luskin, K. Wang (U. Minnesota)

3/20/2018

Superconductivity in Twisted Trilayer Graphene

P. Kim, E. Kaxiras (Harvard) M. Luskin, K. Wang (U. Minnesota)

3/20/2018