Isospin magnetism and spin-polarized superconductivity in Bernal bilayer graphene

Zhou, Haoxin; Holleis, Ludwig; Saito, Yu; Cohen, Liam; Huynh, William; Patterson, Caitlin L.; Yang, Fangyuan; Taniguchi, Takashi; Watanabe, Kenji; Young, Andrea F.

doi:10.1126/science.abm8386

Title: Isospin magnetism and spin-polarized superconductivity in Bernal bilayer graphene

Journal Article · Thu Jan 13 00:00:00 EST 2022 · Science

DOI:https://doi.org/10.1126/science.abm8386· OSTI ID:1980741

^[1];

^[1]; Huynh, William ^[1]; Patterson, Caitlin L. ^[1]; Yang, Fangyuan ^[1];

^[2];

^[1]

University of California, Santa Barbara, CA (United States)
National Institute for Materials Science, Tsukuba (Japan)

In conventional superconductors, Cooper pairing occurs between electrons of opposite spin. We observe spin-polarized superconductivity in Bernal bilayer graphene when doped to a saddle-point van Hove singularity generated by a large applied perpendicular electric field. We observe a cascade of electrostatic gate-tuned transitions between electronic phases distinguished by their polarization within the isospin space defined by the combination of the spin and momentum-space valley degrees of freedom. Although all of these phases are metallic at zero magnetic field, we observe a transition to a superconducting state at finite magnetic field B_∥≈ 150 milliteslas applied parallel to the two-dimensional sheet. Superconductivity occurs near a symmetry-breaking transition and exists exclusively above the B_∥ limit expected of a paramagnetic superconductor with the observed transition critical temperature T_C ≈ 30 millikelvins, consistent with a spin-triplet order parameter.

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Research Organization:: Univ. of California, Santa Barbara, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC); Army Research Office (ARO); Gordon and Betty Moore Foundation; Packard Foundation; Ministry of Education, Culture, Sports, Science and Technology (MEXT); Japan Society for the Promotion of Science (JSPS)

Grant/Contract Number:: SC0020043; W911NF-17-1-0323; GBMF9471; 2016-65145; JPMXP0112101001; 19H05790; 20H00354; 21H05233

OSTI ID:: 1980741

Journal Information:: Science, Vol. 375, Issue 6582; ISSN 0036-8075

Publisher:: AAASCopyright Statement

Country of Publication:: United States

Language:: English

References (47)

Unconventional Superconductivity in Systems with Annular Fermi Surfaces: Application to Rhombohedral Trilayer Graphene Ghazaryan, Areg; Holder, Tobias; Serbyn, Maksym Physical Review Letters, Vol. 127, Issue 24 https://doi.org/10.1103/PhysRevLett.127.247001	journal	December 2021
Accurate tight-binding models for the $π$ bands of bilayer graphene Jung, Jeil; MacDonald, Allan H. Physical Review B, Vol. 89, Issue 3 https://doi.org/10.1103/PhysRevB.89.035405	journal	January 2014
Compressibility of the two-dimensional electron gas: Measurements of the zero-field exchange energy and fractional quantum Hall gap Eisenstein, J. P.; Pfeiffer, L. N.; West, K. W. Physical Review B, Vol. 50, Issue 3 https://doi.org/10.1103/PhysRevB.50.1760	journal	July 1994
Upper Limit for the Critical Field in Hard Superconductors Clogston, A. M. Physical Review Letters, Vol. 9, Issue 6 https://doi.org/10.1103/PhysRevLett.9.266	journal	September 1962
Ising pairing in atomically thin superconductors Zhang, Ding; Falson, Joseph Nanotechnology, Vol. 32, Issue 50 https://doi.org/10.1088/1361-6528/ac238d	journal	September 2021
Metals, fractional metals, and superconductivity in rhombohedral trilayer graphene Szabó, András L.; Roy, Bitan Physical Review B, Vol. 105, Issue 8 https://doi.org/10.1103/PhysRevB.105.L081407	journal	February 2022
Unconventional superconductivity in magic-angle graphene superlattices Cao, Yuan; Fatemi, Valla; Fang, Shiang Nature, Vol. 556, Issue 7699 https://doi.org/10.1038/nature26160	journal	March 2018
Evidence for two-dimensional Ising superconductivity in gated MoS2 Lu, J. M.; Zheliuk, O.; Leermakers, I. Science, Vol. 350, Issue 6266 https://doi.org/10.1126/science.aab2277	journal	November 2015
Review of U-based Ferromagnetic Superconductors: Comparison between UGe ₂ , URhGe, and UCoGe Aoki, Dai; Ishida, Kenji; Flouquet, Jacques Journal of the Physical Society of Japan, Vol. 88, Issue 2 https://doi.org/10.7566/JPSJ.88.022001	journal	February 2019
Theory of dirty superconductors Anderson, P. W. Journal of Physics and Chemistry of Solids, Vol. 11, Issue 1-2 https://doi.org/10.1016/0022-3697(59)90036-8	journal	September 1959
Unconventional quantum Hall effect and Berry’s phase of 2π in bilayer graphene Novoselov, K. S.; McCann, E.; Morozov, S. V. Nature Physics, Vol. 2, Issue 3 https://doi.org/10.1038/nphys245	journal	February 2006
Inter-valley coherent order and isospin fluctuation mediated superconductivity in rhombohedral trilayer graphene Chatterjee, Shubhayu; Wang, Taige; Berg, Erez Nature Communications, Vol. 13, Issue 1 https://doi.org/10.1038/s41467-022-33561-w	journal	October 2022
Ising pairing in superconducting NbSe2 atomic layers Xi, Xiaoxiang; Wang, Zefang; Zhao, Weiwei Nature Physics, Vol. 12, Issue 2 https://doi.org/10.1038/nphys3538	journal	November 2015
Kohn-Luttinger superconductivity and intervalley coherence in rhombohedral trilayer graphene You, Yi-Zhuang; Vishwanath, Ashvin Physical Review B, Vol. 105, Issue 13 https://doi.org/10.1103/PhysRevB.105.134524	journal	April 2022
Superconductivity in rhombohedral trilayer graphene Zhou, Haoxin; Xie, Tian; Taniguchi, Takashi Nature, Vol. 598, Issue 7881 https://doi.org/10.1038/s41586-021-03926-0	journal	September 2021
Direct observation of a widely tunable bandgap in bilayer graphene Zhang, Yuanbo; Tang, Tsung-Ta; Girit, Caglar Nature, Vol. 459, Issue 7248 https://doi.org/10.1038/nature08105	journal	June 2009
Intrinsic and Rashba spin-orbit interactions in graphene sheets Min, Hongki; Hill, J. E.; Sinitsyn, N. A. Physical Review B, Vol. 74, Issue 16 https://doi.org/10.1103/PhysRevB.74.165310	journal	October 2006
Universal phase diagrams with superconducting domes for electronic flat bands Löthman, Tomas; Black-Schaffer, Annica M. Physical Review B, Vol. 96, Issue 6 https://doi.org/10.1103/PhysRevB.96.064505	journal	August 2017
Low-Density Ferromagnetism in Biased Bilayer Graphene Castro, Eduardo V.; Peres, N. M. R.; Stauber, T. Physical Review Letters, Vol. 100, Issue 18 https://doi.org/10.1103/PhysRevLett.100.186803	journal	May 2008
Nearly ferromagnetic spin-triplet superconductivity Ran, Sheng; Eckberg, Chris; Ding, Qing-Ping Science, Vol. 365, Issue 6454 https://doi.org/10.1126/science.aav8645	journal	August 2019
Tunable strongly coupled superconductivity in magic-angle twisted trilayer graphene Park, Jeong Min; Cao, Yuan; Watanabe, Kenji Nature, Vol. 590, Issue 7845 https://doi.org/10.1038/s41586-021-03192-0	journal	February 2021
One-Dimensional Electrical Contact to a Two-Dimensional Material Wang, L.; Meric, I.; Huang, P. Y. Science, Vol. 342, Issue 6158 https://doi.org/10.1126/science.1244358	journal	October 2013
Acoustic-Phonon-Mediated Superconductivity in Rhombohedral Trilayer Graphene Chou, Yang-Zhi; Wu, Fengcheng; Sau, Jay D. Physical Review Letters, Vol. 127, Issue 18 https://doi.org/10.1103/PhysRevLett.127.187001	journal	October 2021
Superconductivity on the Brink of Spin-Charge Order in a Doped Honeycomb Bilayer Vafek, Oskar; Murray, James M.; Cvetkovic, Vladimir Physical Review Letters, Vol. 112, Issue 14 https://doi.org/10.1103/PhysRevLett.112.147002	journal	April 2014
Band structure of $A B C$ -stacked graphene trilayers Zhang, Fan; Sahu, Bhagawan; Min, Hongki Physical Review B, Vol. 82, Issue 3 https://doi.org/10.1103/PhysRevB.82.035409	journal	July 2010
Evidence for a spontaneous gapped state in ultraclean bilayer graphene Bao, W.; Velasco, J.; Zhang, F. Proceedings of the National Academy of Sciences, Vol. 109, Issue 27 https://doi.org/10.1073/pnas.1205978109	journal	June 2012
Isospin magnetism and spin-polarized superconductivity in Bernal bilayer graphene Zhou, Haoxin; Holleis, Ludwig; Saito, Yu Dryad https://doi.org/10.25349/d9g892	dataset	January 2021
Superconductivity and strong correlations in moiré flat bands Balents, Leon; Dean, Cory R.; Efetov, Dmitri K. Nature Physics, Vol. 16, Issue 7 https://doi.org/10.1038/s41567-020-0906-9	journal	May 2020
Resonance Microwave Measurements of an Intrinsic Spin-Orbit Coupling Gap in Graphene: A Possible Indication of a Topological State Sichau, J.; Prada, M.; Anlauf, T. Physical Review Letters, Vol. 122, Issue 4 https://doi.org/10.1103/PhysRevLett.122.046403	journal	February 2019
Electrode-Free Anodic Oxidation Nanolithography of Low-Dimensional Materials Li, Hongyuan; Ying, Zhe; Lyu, Bosai Nano Letters, Vol. 18, Issue 12 https://doi.org/10.1021/acs.nanolett.8b04166	journal	November 2018
Trigonal warping and Berry’s phase $N π$ in ABC-stacked multilayer graphene Koshino, Mikito; McCann, Edward Physical Review B, Vol. 80, Issue 16 https://doi.org/10.1103/PhysRevB.80.165409	journal	October 2009
Competition of electron-phonon mediated superconductivity and Stoner magnetism on a flat band Ojajärvi, Risto; Hyart, Timo; Silaev, Mihail A. Physical Review B, Vol. 98, Issue 5 https://doi.org/10.1103/PhysRevB.98.054515	journal	August 2018
Spin–orbit-driven band inversion in bilayer graphene by the van der Waals proximity effect Island, J. O.; Cui, X.; Lewandowski, C. Nature, Vol. 571, Issue 7763 https://doi.org/10.1038/s41586-019-1304-2	journal	June 2019
Sliding-Mode Conductivity in Nb ${Se}_{3}$ : Observation of a Threshold Electric Field and Conduction Noise Fleming, R. M.; Grimes, C. C. Physical Review Letters, Vol. 42, Issue 21 https://doi.org/10.1103/PhysRevLett.42.1423	journal	May 1979
Spontaneously Gapped Ground State in Suspended Bilayer Graphene Freitag, F.; Trbovic, J.; Weiss, M. Physical Review Letters, Vol. 108, Issue 7 https://doi.org/10.1103/PhysRevLett.108.076602	journal	February 2012
Half- and quarter-metals in rhombohedral trilayer graphene Zhou, Haoxin; Xie, Tian; Ghazaryan, Areg Nature, Vol. 598, Issue 7881 https://doi.org/10.1038/s41586-021-03938-w	journal	September 2021
Pauli-limit violation and re-entrant superconductivity in moiré graphene Cao, Yuan; Park, Jeong Min; Watanabe, Kenji Nature, Vol. 595, Issue 7868 https://doi.org/10.1038/s41586-021-03685-y	journal	July 2021
A note on the Maximum Critical Field of High‐Field Superconductors Chandrasekhar, B. S. Applied Physics Letters, Vol. 1, Issue 1 https://doi.org/10.1063/1.1777362	journal	September 1962
Electric field–tunable superconductivity in alternating-twist magic-angle trilayer graphene Hao, Zeyu; Zimmerman, A. M.; Ledwith, Patrick Science, Vol. 371, Issue 6534 https://doi.org/10.1126/science.abg0399	journal	February 2021
Magnetotransport in a two-dimensional electron gas at large filling factors Vavilov, M. G.; Aleiner, I. L. Physical Review B, Vol. 69, Issue 3 https://doi.org/10.1103/PhysRevB.69.035303	journal	January 2004
Broken-Symmetry States in Doubly Gated Suspended Bilayer Graphene Weitz, R. T.; Allen, M. T.; Feldman, B. E. Science, Vol. 330, Issue 6005 https://doi.org/10.1126/science.1194988	journal	October 2010
Superconductivity from repulsive interactions in rhombohedral trilayer graphene: A Kohn-Luttinger-like mechanism Cea, Tommaso; Pantaleón, Pierre A.; Phong, Võ Tiến Physical Review B, Vol. 105, Issue 7 https://doi.org/10.1103/PhysRevB.105.075432	journal	February 2022
Interaction-Driven Spectrum Reconstruction in Bilayer Graphene Mayorov, A. S.; Elias, D. C.; Mucha-Kruczynski, M. Science, Vol. 333, Issue 6044 https://doi.org/10.1126/science.1208683	journal	August 2011
Magnetic Field-Induced Superconductivity in the Ferromagnet URhGe Levy, F. Science, Vol. 309, Issue 5739 https://doi.org/10.1126/science.1115498	journal	August 2005
Tunable interacting composite fermion phases in a half-filled bilayer-graphene Landau level Zibrov, A. A.; Kometter, C.; Zhou, H. Nature, Vol. 549, Issue 7672 https://doi.org/10.1038/nature23893	journal	September 2017
Dynamic band-structure tuning of graphene moiré superlattices with pressure Yankowitz, Matthew; Jung, Jeil; Laksono, Evan Nature, Vol. 557, Issue 7705 https://doi.org/10.1038/s41586-018-0107-1	journal	May 2018
Pairing symmetry in cuprate superconductors Tsuei, C. C.; Kirtley, J. R. Reviews of Modern Physics, Vol. 72, Issue 4, p. 969-1016 https://doi.org/10.1103/RevModPhys.72.969	journal	October 2000

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