Cevallos FA, Guo S, Heo H, Scuri G, Zhou Y, Sung J, Taniguchi T, Watanabe K, Kim P, Park H, Cava RJ.
Liquid Salt Transport Growth of Single Crystals of the Layered Dichalcogenides MoS2 and WS2 [Internet]. Crystal Growth & Design 2019;19(10):5762-5767.
Publisher's Version Andersen TI, Dwyer BL, Sanchez-Yamagishi JD, Rodriguez-Nieva JF, Agarwal K, Watanabe K, Taniguchi T, Demler EA, Kim P, Park H, Lukin MD.
Electron-phonon instability in graphene revealed by global and local noise probes [Internet]. Science 2019;364(6436):154–157.
Publisher's VersionAbstractStudying the electronic properties of graphene under extreme nonequilibrium conditions has provided a productive testbed to probe and monitor exotic transport phenomena. Andersen et al. report measurements of electron transport in ultraclean graphene devices where the electron drift velocity is extremely high. They found that direct current at high drift velocities generates a large increase in the noise at gigahertz frequencies and that the noise grows exponentially in the direction of the current. The authors attribute the emission mechanism to amplification of acoustic phonons through the Cerenkov effect.Science, this issue p. 154Understanding and controlling nonequilibrium electronic phenomena is an outstanding challenge in science and engineering. By electrically driving ultraclean graphene devices out of equilibrium, we observe an instability that is manifested as substantially enhanced current fluctuations and suppressed conductivity at microwave frequencies. Spatial mapping of the nonequilibrium current fluctuations using nanoscale magnetic field sensors reveals that the fluctuations grow exponentially along the direction of carrier flow. Our observations, including the dependence on density and temperature, are consistently explained by the emergence of an electron-phonon Cerenkov instability at supersonic drift velocities. These results offer the opportunity for tunable terahertz generation and active phononic devices based on two-dimensional materials.
Yoo H, Engelke R, Carr S, Fang S, Zhang K, Cazeaux P, Sung SH, Hovden R, Tsen AW, Taniguchi T, Watanabe K, Yi G-C, Kim M, Luskin M, Tadmor EB, Kaxiras E, Kim P.
Atomic and electronic reconstruction at the van der Waals interface in twisted bilayer graphene [Internet]. Nature Materials 2019;18(5):448–453.
Publisher's Version Jauregui LA, Joe AY, Pistunova K, Wild DS, High AA, Zhou Y, Scuri G, De Greve K, Sushko A, Yu C-H, Taniguchi T, Watanabe K, Needleman DJ, Lukin MD, Park H, Kim P.
Electrical control of interlayer exciton dynamics in atomically thin heterostructures [Internet]. Science 2019;366(6467):870–875.
Publisher's Version Dibos AM, Zhou Y, Jauregui LA, Scuri G, Wild DS, High AA, Taniguchi T, Watanabe K, Lukin MD, Kim P, Park H.
Electrically Tunable Exciton–Plasmon Coupling in a WSe2 Monolayer Embedded in a Plasmonic Crystal Cavity [Internet]. Nano Letters 2019;19(6):3543–3547.
Publisher's Version Chaudhary K, Tamagnone M, Rezaee M, Bediako DK, Ambrosio A, Kim P, Capasso F.
Engineering phonon polaritons in van der Waals heterostructures to enhance in-plane optical anisotropy [Internet]. Science Advances 2019;5(4):eaau7171.
Publisher's Version Wang K, Elahi MM, Wang L, Habib KMM, Taniguchi T, Watanabe K, Hone J, Ghosh AW, Lee G-H, Kim P.
Graphene transistor based on tunable Dirac fermion optics [Internet]. Proceedings of the National Academy of Sciences 2019;116(14):6575–6579.
Publisher's Version Cheng A, Taniguchi T, Watanabe K, Kim P, Pillet J-D.
Guiding Dirac Fermions in Graphene with a Carbon Nanotube [Internet]. Physical Review Letters 2019;123(21)
Publisher's Version Liu X, Hao Z, Watanabe K, Taniguchi T, Halperin BI, Kim P.
Interlayer fractional quantum Hall effect in a coupled graphene double layer [Internet]. Nature Physics 2019;15(9):893–897.
Publisher's Version Tamagnone M, Chaudhary K, Yin X, Spagele C, Li J, Oscurato S, Rubin NA, Jauregui L, Kim P, Edgar JH, Ambrosio A, Capasso F.
Polariton Meta-Optics with Phase-Change Materials [Internet]. In: Conference on Lasers and Electro-Optics. OSA; 2019
Publisher's Version Chaudhary K, Tamagnone M, Yin X, Spagele CM, Oscurato SL, Li J, Persch C, Li RP, Rubin NA, Jauregui LA, Watanabe K, Taniguchi T, Kim P, Wuttig M, Edgar JH, Ambrosio A, Capasso F.
Polariton nanophotonics using phase-change materials [Internet]. Nature Communications 2019;10(1)
Publisher's Version Yin X, Spagele CM, Tamagnone M, Chaudhary K, Oscurato SL, Li J, Li RP, Rubin N, Jauregui LA, Kim P, Edgar JH, Ambrosio A, Capasso F.
Reconfigurable mid-infrared optical elements using phase change materials [Internet]. In: Conference on Lasers and Electro-Optics. OSA; 2019
Publisher's Version Zhao SYF, Poccia N, Panetta MG, Yu C, Johnson JW, Yoo H, Zhong R, Gu GD, Watanabe K, Taniguchi T, Postolova SV, Vinokur VM, Kim P.
Sign-Reversing Hall Effect in Atomically Thin High-Temperature Bi2.1Sr1.9CaCu2.0O8+δ Superconductors [Internet]. Physical Review Letters 2019;122(24)
Publisher's Version Day RW, Bediako DK, Rezaee M, Parent LR, Skorupskii G, Arguilla MQ, Hendon CH, Stassen I, Gianneschi NC, Kim P, Dincă M.
Single Crystals of Electrically Conductive Two-Dimensional Metal–Organic Frameworks: Structural and Electrical Transport Properties [Internet]. ACS Central Science 2019;5(12):1959–1964.
Publisher's Version Wang K, Harzheim A, Taniguchi T, Watanabei K, Lee JU, Kim P.
Tunneling Spectroscopy of Quantum Hall States in Bilayer Graphene p-n Junctions [Internet]. Physical Review Letters 2019;122(14)
Publisher's Version