Crossover between strongly coupled and weakly coupled exciton superfluids

Liu, Xiaomeng; Li, J. I.  A.; Watanabe, Kenji; Taniguchi, Takashi; Hone, James; Halperin, Bertrand I.; Kim, Philip; Dean, Cory R.

doi:10.1126/science.abg1110

Crossover between strongly coupled and weakly coupled exciton superfluids

Journal Article · 14 January 2022 · Science

DOI:https://doi.org/10.1126/science.abg1110· OSTI ID:1980725

^[1]; ^[2]; ^[3]; ^[4]; ^[5]; ^[6]; ^[6]; ^[7]

Department of Physics, Harvard University, Cambridge, MA 02138, USA.; OSTI
Department of Physics, Brown University, Providence, RI 02912, USA.
Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan.
Department of Mechanical Engineering, Columbia University, New York, NY 10027, USA.
Department of Physics, Harvard University, Cambridge, MA 02138, USA.
Department of Physics, Columbia University, New York, NY 10027, USA.

Following a crossover

Superfluidity in fermionic systems occurs through the pairing of fermions into bosons, which can undergo condensation. Depending on the strength of the interactions between fermions, the pairs range from large and overlapping to tightly bound. The crossover between these two limits has been explored in ultracold Fermi gases. Liuet al. observed the crossover in an electronic system consisting of two layers of graphene separated by an insulating barrier and placed in a magnetic field. In this two-dimensional system, the pairs were excitons formed from an electron in one layer and a hole in the other. The researchers used magnetic field and layer separation to tune the interactions and detected the signatures of superfluidity through transport measurements. —JS

Research Organization:: Harvard Univ., Cambridge, MA (United States); Cornell Univ., Ithaca, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

DOE Contract Number:: SC0012260; SC0019481;

OSTI ID:: 1980725

Journal Information:: Science, Journal Name: Science Journal Issue: 6577 Vol. 375; ISSN 0036-8075

Publisher:: AAAS

Country of Publication:: United States

Language:: English

References (49)

Resistive transition in superconducting films Halperin, B. I.; Nelson, David R. Journal of Low Temperature Physics, Vol. 36, Issue 5-6 https://doi.org/10.1007/BF00116988	journal	September 1979
Bose condensation in an attractive fermion gas: From weak to strong coupling superconductivity Nozi�res, P.; Schmitt-Rink, S. Journal of Low Temperature Physics, Vol. 59, Issue 3-4 https://doi.org/10.1007/BF00683774	journal	May 1985
The doping dependence of T* – what is the real high-Tc phase diagram? Tallon, J. L.; Loram, J. W. Physica C: Superconductivity, Vol. 349, Issue 1-2 https://doi.org/10.1016/S0921-4534(00)01524-0	journal	January 2001
BCS–BEC crossover: From high temperature superconductors to ultracold superfluids Chen, Q.; Stajic, J.; Tan, S. Physics Reports, Vol. 412, Issue 1 https://doi.org/10.1016/j.physrep.2005.02.005	journal	June 2005
Bose–Einstein condensation of excitons in bilayer electron systems Eisenstein, J. P.; MacDonald, A. H. Nature, Vol. 432, Issue 7018 https://doi.org/10.1038/nature03081	journal	December 2004
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
How to make a bilayer exciton condensate flow Su, Jung-Jung; MacDonald, A. H. Nature Physics, Vol. 4, Issue 10 https://doi.org/10.1038/nphys1055	journal	August 2008
Quantum Hall drag of exciton condensate in graphene Liu, Xiaomeng; Watanabe, Kenji; Taniguchi, Takashi Nature Physics, Vol. 13, Issue 8 https://doi.org/10.1038/nphys4116	journal	May 2017
Excitonic superfluid phase in double bilayer graphene Li, J. I. A.; Taniguchi, T.; Watanabe, K. Nature Physics, Vol. 13, Issue 8 https://doi.org/10.1038/nphys4140	journal	May 2017
Evidence for a topological excitonic insulator in InAs/GaSb bilayers Du, Lingjie; Li, Xinwei; Lou, Wenkai Nature Communications, Vol. 8, Issue 1 https://doi.org/10.1038/s41467-017-01988-1	journal	December 2017
Interlayer fractional quantum Hall effect in a coupled graphene double layer Liu, Xiaomeng; Hao, Zeyu; Watanabe, Kenji Nature Physics, Vol. 15, Issue 9 https://doi.org/10.1038/s41567-019-0546-0	journal	June 2019
Pairing states of composite fermions in double-layer graphene Li, J. I. A.; Shi, Q.; Zeng, Y. Nature Physics, Vol. 15, Issue 9 https://doi.org/10.1038/s41567-019-0547-z	journal	June 2019
Magnetic field tuning of an excitonic insulator between the weak and strong coupling regimes in quantum limit graphite Zhu, Z.; McDonald, R. D.; Shekhter, A. Scientific Reports, Vol. 7, Issue 1 https://doi.org/10.1038/s41598-017-01693-5	journal	May 2017
Cooper Pairing in Spin-Polarized Fermi Systems Leggett, A. J. Le Journal de Physique Colloques, Vol. 41, Issue C7 https://doi.org/10.1051/jphyscol:1980704	journal	July 1980
When fermions become bosons: Pairing in ultracold gases Sá de Melo, Carlos A. R. Physics Today, Vol. 61, Issue 10 https://doi.org/10.1063/1.3001867	journal	October 2008
Ordering, metastability and phase transitions in two-dimensional systems Kosterlitz, J M; Thouless, D J Journal of Physics C: Solid State Physics, Vol. 6, Issue 7, p. 1181-1203 https://doi.org/10.1088/0022-3719/6/7/010	journal	April 1973
The pseudogap in high-temperature superconductors: an experimental survey Timusk, Tom; Statt, Bryan Reports on Progress in Physics, Vol. 62, Issue 1 https://doi.org/10.1088/0034-4885/62/1/002	journal	January 1999
Models of coherent exciton condensation Littlewood, P. B.; Eastham, P. R.; Keeling, J. M. J. Journal of Physics: Condensed Matter, Vol. 16, Issue 35 https://doi.org/10.1088/0953-8984/16/35/003	journal	August 2004
Theory of Superconductivity Bardeen, J.; Cooper, L. N.; Schrieffer, J. R. Physical Review, Vol. 108, Issue 5 https://doi.org/10.1103/PhysRev.108.1175	journal	December 1957
Excitonic Insulator Jérome, D.; Rice, T. M.; Kohn, W. Physical Review, Vol. 158, Issue 2 https://doi.org/10.1103/PhysRev.158.462	journal	June 1967
Possible Pairing without Superconductivity at Low Carrier Concentrations in Bulk and Thin-Film Superconducting Semiconductors Eagles, D. M. Physical Review, Vol. 186, Issue 2 https://doi.org/10.1103/PhysRev.186.456	journal	October 1969
Spontaneous breakdown of continuous symmetries near two dimensions Brézin, E.; Zinn-Justin, J. Physical Review B, Vol. 14, Issue 7 https://doi.org/10.1103/PhysRevB.14.3110	journal	October 1976
Excitations from a filled Landau level in the two-dimensional electron gas Kallin, C.; Halperin, B. I. Physical Review B, Vol. 30, Issue 10 https://doi.org/10.1103/PhysRevB.30.5655	journal	November 1984
Skyrmions and the crossover from the integer to fractional quantum Hall effect at small Zeeman energies Sondhi, S. L.; Karlhede, A.; Kivelson, S. A. Physical Review B, Vol. 47, Issue 24 https://doi.org/10.1103/PhysRevB.47.16419	journal	June 1993
Theory of the half-filled Landau level Halperin, B. I.; Lee, Patrick A.; Read, Nicholas Physical Review B, Vol. 47, Issue 12 https://doi.org/10.1103/PhysRevB.47.7312	journal	March 1993
Anomalous temperature dependence of the correlated ν=1 quantum Hall effect in bilayer electron systems Lay, T. S.; Suen, Y. W.; Manoharan, H. C. Physical Review B, Vol. 50, Issue 23 https://doi.org/10.1103/PhysRevB.50.17725	journal	December 1994
Trial wave functions for ν = 1 2 + 1 2 quantum Hall bilayers Möller, Gunnar; Simon, Steven H.; Rezayi, Edward H. Physical Review B, Vol. 79, Issue 12 https://doi.org/10.1103/PhysRevB.79.125106	journal	March 2009
Composite fermion duality for half-filled multicomponent Landau levels Sodemann, Inti; Kimchi, Itamar; Wang, Chong Physical Review B, Vol. 95, Issue 8 https://doi.org/10.1103/PhysRevB.95.085135	journal	February 2017
Paired Composite Fermion Phase of Quantum Hall Bilayers at ν = 1 2 + 1 2 Möller, Gunnar; Simon, Steven H.; Rezayi, Edward H. Physical Review Letters, Vol. 101, Issue 17 https://doi.org/10.1103/PhysRevLett.101.176803	journal	October 2008
Interlayer Coherent Composite Fermi Liquid Phase in Quantum Hall Bilayers Alicea, Jason; Motrunich, Olexei I.; Refael, G. Physical Review Letters, Vol. 103, Issue 25 https://doi.org/10.1103/PhysRevLett.103.256403	journal	December 2009
Observation of Pair Condensation in the Quasi-2D BEC-BCS Crossover Ries, M. G.; Wenz, A. N.; Zürn, G. Physical Review Letters, Vol. 114, Issue 23 https://doi.org/10.1103/PhysRevLett.114.230401	journal	June 2015
Frictional Magneto-Coulomb Drag in Graphene Double-Layer Heterostructures Liu, Xiaomeng; Wang, Lei; Fong, Kin Chung Physical Review Letters, Vol. 119, Issue 5 https://doi.org/10.1103/PhysRevLett.119.056802	journal	August 2017
s -Wave Paired Electron and Hole Composite Fermion Trial State for Quantum Hall Bilayers with ν=1 Wagner, Glenn; Nguyen, Dung X.; Simon, Steven H. Physical Review Letters, Vol. 127, Issue 24 https://doi.org/10.1103/PhysRevLett.127.246803	journal	December 2021
Bound states, Cooper pairing, and Bose condensation in two dimensions Randeria, Mohit; Duan, Ji-Min; Shieh, Lih-Yir Physical Review Letters, Vol. 62, Issue 9 https://doi.org/10.1103/PhysRevLett.62.981	journal	February 1989
Gauge Fields and Pairing in Double-Layer Composite Fermion Metals Bonesteel, N. E.; McDonald, I. A.; Nayak, C. Physical Review Letters, Vol. 77, Issue 14 https://doi.org/10.1103/PhysRevLett.77.3009	journal	September 1996
Observation of Quantized Hall Drag in a Strongly Correlated Bilayer Electron System Kellogg, M.; Spielman, I. B.; Eisenstein, J. P. Physical Review Letters, Vol. 88, Issue 12 https://doi.org/10.1103/PhysRevLett.88.126804	journal	March 2002
Observation of Resonance Condensation of Fermionic Atom Pairs Regal, C. A.; Greiner, M.; Jin, D. S. Physical Review Letters, Vol. 92, Issue 4 https://doi.org/10.1103/PhysRevLett.92.040403	journal	January 2004
Condensation of Pairs of Fermionic Atoms near a Feshbach Resonance Zwierlein, M. W.; Stan, C. A.; Schunck, C. H. Physical Review Letters, Vol. 92, Issue 12 https://doi.org/10.1103/PhysRevLett.92.120403	journal	March 2004
Vanishing Hall Resistance at High Magnetic Field in a Double-Layer Two-Dimensional Electron System Kellogg, M.; Eisenstein, J. P.; Pfeiffer, L. N. Physical Review Letters, Vol. 93, Issue 3 https://doi.org/10.1103/PhysRevLett.93.036801	journal	July 2004
Counterflow Measurements in Strongly Correlated GaAs Hole Bilayers: Evidence for Electron-Hole Pairing Tutuc, E.; Shayegan, M.; Huse, D. A. Physical Review Letters, Vol. 93, Issue 3 https://doi.org/10.1103/PhysRevLett.93.036802	journal	July 2004
Experimental Study of the BEC-BCS Crossover Region in Lithium 6 Bourdel, T.; Khaykovich, L.; Cubizolles, J. Physical Review Letters, Vol. 93, Issue 5 https://doi.org/10.1103/PhysRevLett.93.050401	journal	July 2004
Is the Composite Fermion a Dirac Particle? Son, Dam Thanh Physical Review X, Vol. 5, Issue 3 https://doi.org/10.1103/PhysRevX.5.031027	journal	September 2015
Tuning across the BCS-BEC crossover in the multiband superconductor Fe _{1+ y} Se _x Te _{1− x} : An angle-resolved photoemission study Rinott, Shahar; Chashka, K. B.; Ribak, Amit Science Advances, Vol. 3, Issue 4 https://doi.org/10.1126/sciadv.1602372	journal	April 2017
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
High-temperature pairing in a strongly interacting two-dimensional Fermi gas Murthy, Puneet A.; Neidig, Mathias; Klemt, Ralf Science, Vol. 359, Issue 6374 https://doi.org/10.1126/science.aan5950	journal	December 2017
Gate-controlled BCS-BEC crossover in a two-dimensional superconductor Nakagawa, Yuji; Kasahara, Yuichi; Nomoto, Takuya Science, Vol. 372, Issue 6538 https://doi.org/10.1126/science.abb9860	journal	April 2021
The Half-Full Landau Level Halperin, Bertrand I. Fractional Quantum Hall Effects https://doi.org/10.1142/9789811217494_0002	book	June 2020
Crossover from Bardeen-Cooper-Schrieffer to Bose-Einstein Condensation and the Unitary Fermi Gas Randeria, Mohit; Taylor, Edward Annual Review of Condensed Matter Physics, Vol. 5, Issue 1 https://doi.org/10.1146/annurev-conmatphys-031113-133829	journal	March 2014
Exciton Condensation in Bilayer Quantum Hall Systems Eisenstein, J. P. Annual Review of Condensed Matter Physics, Vol. 5, Issue 1 https://doi.org/10.1146/annurev-conmatphys-031113-133832	journal	March 2014

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