2023

Broken symmetries and excitation spectra of interacting electrons in partially filled Landau levels.
G. Farahi*, C. Chiu*, X. Liu*, Zlatko Papic, K. Watanabe, T. Taniguchi, M. Zaletel, A. Yazdani†
Nature Physics (2023).

2022

Visualizing broken symmetry and topological defects in a quantum Hall ferromagnet.
X. Liu*, G. Farahi*, C. Chiu*, Zlatko Papic, K. Watanabe, T. Taniguchi, M. Zaletel, A. Yazdani†.
Science 375, 321-326 (2022).  

Crossover between strongly-coupled and weakly-coupled exciton superfluids.
X. Liu*, J.I.A Li*, K. Watanabe, T. Taniguchi, J. Hone, B. I. Halperin, C. R. Dean & P. Kim†
Science 375, 205-209 (2022).

Evidence for a monolayer excitonic insulator.
Y. Jia, P. Wang, C. Chiu, Z. Song, G. Yu, B. Jäck, S. Lei, S. Klemenz, F. A. Cevallos, M. Onyszczak, N. Fishchenko, X. Liu, G. Farahi, F. Xie, Y. Xu, K. Watanabe, T. Taniguchi, B. A. Bernevig, R. J. Cava, L. M. Schoop, A. Yazdani, S. Wu†
Nature Physics 18, 87–93 (2022).

2021

Evidence for unconventional superconductivity in twisted bilayer graphene.
M. Oh, K. P. Nuckolls, D. Wong, R. L. Lee, X. Liu, K. Watanabe, T. Taniguchi, A. Yazdani†
Nature 600, 240–245 (2021).

Spectroscopy of a tunable moiré system with a correlated and topological flat band.
X. Liu*, C. Chiu*, J. Y. Lee, G. Farahi, K. Watanabe, T. Taniguchi, A. Vishwanath, A. Yazdani†
Nature Communications 12, 2732 (2021).

2020

Tunable spin-polarized correlated states in twisted double bilayer graphene.
X. Liu*†, Z. Hao*, E. Khalaf, J. Y. Lee, Y. Ronen, H. Yoo, D. H. Najafabadi, K. Watanabe, T. Taniguchi, A. Vishwanath, P. Kim†
Nature 583, 221-225 (2020).

Bosonic topological insulator intermediate state in the superconductor-insulator transition.
M. C. Diamantini, A. Yu. Mironov, S. V. Postolova, X. Liu, Z. Hao, D. M. Silevitch, Ya. Kopelevich, P. Kim, C. A. Trugenberger, V. M. Vinokur
Physical Review A, 384, 126570 (2020).

2019

Interlayer fractional quantum Hall effect in a coupled graphene double-layer.
X. Liu, Z. Hao, K. Watanabe, T. Taniguchi, B. Halperin, P. Kim†
Nature Physics 15, 893–897 (2019).

Spectroscopic signatures of many-body correlations in magic-angle twisted bilayer graphene.
Y. Xie, B. Lian, B. Jack, X. Liu, C. Chiu, K. Watanabe, T. Taniguchi, B.A. Bernevig, A. Yazdani†
Nature 572, 101–105 (2019).

Theory of correlated insulating behaviour and spin-triplet superconductivity in twisted double bilayer graphene.
J. Y. Lee, E. Khalaf, S. Liu, X. Liu, Z. Hao, P. Kim, A. Vishwanath†
Nature Communications 10,5333 (2019).

2017

Quantum Hall drag of exciton superfluid in graphene.
X. Liu, K. Watanabe, T. Taniguchi, B. I. Halperin & P. Kim†
Nature Physics 13, 746-750 (2017).

Plasmon reflections by topological electronic boundaries in bilayer graphene.
B. Jiang, G. Ni, Z. Addison, J. Shi, X. Liu, S. Zhao, P. Kim, E. Mele, D. Basov & M. Fogler†
Nano letters 17 (11), 7080-7085 (2017).

Frictional magneto-Coulomb drag in graphene double-layer heterostructures.
X. Liu, L. Wang, K. C. Fong, Y. Gao, P. Maher, K. Watanabe, T. Taniguchi, J. Hone, C. R. Dean & P. Kim†
Physical Review Letters, 119, 056802 (2017).

2016 and earlier

Observation of the Dirac fluid and the breakdown of the Wiedemann-Franz law in graphene.
J. Crossno, J. K. Shi, K. Wang, X. Liu, A. Harzheim, A. Lucas, S. Sachdev, P. Kim, T. Taniguchi, K. Watanabe, T. A. Ohki & K. C. Fong†
Science 351, 1058–1061 (2016).

Development of high frequency and wide bandwidth Johnson noise thermometry.
J. Crossno, X. Liu, T. A. Ohki, P. Kim & K. C. Fong†
Appl. Phys. Lett. 106, 23121 (2015).