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Browsing MIT Open Access Articles by Author "Levitov, Leonid"

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Browsing MIT Open Access Articles by Author "Levitov, Leonid"

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  • Shytov, Andrei; Rudner, Mark; Gu, Nan; Katsnelson, Mikhail; Levitov, Leonid (Elsevier, 2009-03)
    Electrons in graphene, behaving as massless relativistic Dirac particles, provide a new perspective on the relation between condensed matter and high-energy physics. We discuss atomic collapse, a novel state of superheavy ...
  • Levitov, Leonid; Young, Andrea F. (American Physical Society (APS), 2011-08)
    The unique capabilities of capacitance measurements in bilayer graphene enable probing of layer-specific properties that are normally out of reach in transport measurements. Furthermore, capacitance measurements in the ...
  • Gu, Nan; Levitov, Leonid; Rudner, Mark (American Physical Society (APS), 2011-10)
    We show that the strong coupling of pseudospin orientation and charge carrier motion in bilayer graphene has a drastic effect on transport properties of ballistic p-n-p junctions. Electronic states with zero momentum ...
  • Chubukov, A. V.; Nandkishore, Rahul Mahajan; Levitov, Leonid (2012-01)
    Chiral superconductivity, which breaks time-reversal symmetry, can exhibit a wealth of fascinating properties that are highly sought after for nanoscience applications. We identify doped graphene monolayer as a system where ...
  • Gu, Nan; Rudner, Mark; Young, Andrea; Kim, Philip; Levitov, Leonid (American Physical Society, 2011-02)
    We describe a new regime of magnetotransport in two-dimensional electron systems in the presence of a narrow potential barrier. In such systems, the Landau level states, which are confined to the barrier region in strong ...
  • Nandkishore, Rahul Mahajan; Levitov, Leonid (National Academy of Sciences (U.S.), 2011-08)
    Interference and tunneling are two signature quantum effects that are often perceived as the yin and yang of quantum mechanics: a particle simultaneously propagating along several distinct classical paths versus a particle ...
  • Song, Justin Chien Wen; Reizer, Michael Y.; Levitov, Leonid (American Physical Society, 2012-09)
    We predict that graphene is a unique system where disorder-assisted scattering (supercollisions) dominates electron-lattice cooling over a wide range of temperatures, up to room temperature. This is so because for ...
  • Levitov, Leonid; Nandkishore, Rahul Mahajan (American Physical Society, 2010-04)
    Electron interactions in undoped bilayer graphene lead to an instability of the gapless state, “which-layer” symmetry breaking, and energy gap opening at the Dirac point. In contrast with single-layer graphene, the bilayer ...
  • Shytov, Andrey; Levitov, Leonid; Song, Justin Chien Wen (American Physical Society, 2013-12)
    We develop a theory of interaction effects in graphene superlattices, where tunable superlattice periodicity can be used as a knob to control the gap at the Dirac point. Applied to graphene on hexa-boron-nitride (G/h-BN), ...
  • Nandkishore, Rahul Mahajan; Levitov, Leonid (American Physical Society, 2010-09)
    We analyze the many-body properties of bilayer graphene (BLG) at charge neutrality, governed by long-range interactions between electrons. Perturbation theory in a large number of flavors is used in which the interactions ...
  • Song, Justin Chien Wen; Levitov, Leonid (American Physical Society, 2012-12)
    Coulomb coupling in graphene heterostructures results in vertical energy transfer between electrons in proximal layers. We show that, in the presence of correlated density inhomogeneity in the layers, vertical energy ...
  • Yang, Sen; Butov, L. V.; Simons, B. D.; Gossard, A. C.; Levitov, Leonid (American Physical Society, 2010-03)
    We report on the study of spatiotemporal self-organization of carriers in photoexcited GaAs quantum wells. Propagating interfaces between electron-rich and hole-rich regions are seen as expanding and collapsing exciton ...
  • Levitov, Leonid; Abanin, Dmitry A.; Skachko, I.; Du, X.; Andrei, E. Y. (American Physical Society, 2010-03)
    Recently, fractional-quantized Hall effect was observed in suspended graphene (SG), a free-standing monolayer of carbon, where it was found to persist up to T=10 K. The best results in those experiments were obtained on ...
  • Rudner, M. S.; Vandersypen, L. M. K.; Vuletic, Vladan; Levitov, Leonid (American Physical Society (APS), 2011-11)
    We present a scheme for achieving coherent spin squeezing of nuclear spin states in semiconductor quantum dots. The nuclear polarization dependence of the electron spin resonance generates a unitary evolution that drives ...
  • Levitov, Leonid; Abanin, Dmitry A.; Gorbachev, R. V.; Novoselov, K. S.; Geim, A. K. (American Physical Society, 2011-04)
    We propose a new approach to generate and detect spin currents in graphene, based on a large spin-Hall response arising near the neutrality point in the presence of an external magnetic field. Spin currents result from the ...
  • Song, Justin Chien Wen; Levitov, Leonid (American Physical Society, 2013-09)
    Massless Dirac fermions in graphene at charge neutrality form a strongly interacting system in which both charged and neutral (energy) modes play an important role. These modes are essentially decoupled in the absence of ...
  • Gabor, Nathaniel M.; Song, Justin Chien Wen; Ma, Qiong; Nair, Nityan L.; Taychatanapat, Thiti; Levitov, Leonid; Jarillo-Herrero, Pablo; Watanabe, Kenji; Taniguchi, Takashi (American Association for the Advancement of Science (AAAS), 2011-10)
    We report on the intrinsic optoelectronic response of high-quality dual-gated monolayer and bilayer graphene p-n junction devices. Local laser excitation (of wavelength 850 nanometers) at the p-n interface leads to striking ...
  • Song, Justin Chien Wen; Rudner, Mark S.; Marcus, Charles M.; Levitov, Leonid (American Chemical Society, 2011-09)
    Strong electron–electron interactions in graphene are expected to result in multiple-excitation generation by the absorption of a single photon. We show that the impact of carrier multiplication on photocurrent response ...
  • Levitov, Leonid; Abanin, Dmitry A.; Shytov, Andrei V. (American Physical Society, 2009-07)
    We present a theory of electron-mediated interaction between adatoms in graphene. In the case of resonant scattering, relevant for hydrogenated graphene, a long-range 1/r interaction is found. This interaction can be viewed ...
  • Halperin, B. I.; Shytov, A. V.; Abanin, Dmitry A.; Levitov, Leonid (American Physical Society, 2009-01)
    A nonlocal electric response in the spin Hall regime, resulting from spin diffusion mediating charge conduction, is predicted. The spin-mediated transport stands out due to its long-range character, and can give dominant ...
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