1
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Ha W, Ha SD, Choi MD, Tang Y, Schmitz AE, Levendorf MP, Lee K, Chappell JM, Adams TS, Hulbert DR, Acuna E, Noah RS, Matten JW, Jura MP, Wright JA, Rakher MT, Borselli MG. A Flexible Design Platform for Si/SiGe Exchange-Only Qubits with Low Disorder. NANO LETTERS 2022; 22:1443-1448. [PMID: 34806894 DOI: 10.1021/acs.nanolett.1c03026] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Spin-based silicon quantum dots are an attractive qubit technology for quantum information processing with respect to coherence time, control, and engineering. Here we present an exchange-only Si qubit device platform that combines the throughput of CMOS-like wafer processing with the versatility of direct-write lithography. The technology, which we coin "SLEDGE", features dot-shaped gates that are patterned simultaneously on one topographical plane and subsequently connected by vias to interconnect metal lines. The process design enables nontrivial layouts as well as flexibility in gate dimensions, material selection, and additional device features such as for rf qubit control. We show that the SLEDGE process has reduced electrostatic disorder with respect to traditional overlapping gate devices with lift-off metallization, and we present spin coherent exchange oscillations and single qubit blind randomized benchmarking data.
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Affiliation(s)
- Wonill Ha
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Sieu D Ha
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Maxwell D Choi
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Yan Tang
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Adele E Schmitz
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Mark P Levendorf
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Kangmu Lee
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - James M Chappell
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Tower S Adams
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Daniel R Hulbert
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Edwin Acuna
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Ramsey S Noah
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Justine W Matten
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Michael P Jura
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Jeffrey A Wright
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Matthew T Rakher
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
| | - Matthew G Borselli
- HRL Laboratories, LLC, 3011 Malibu Canyon Road, Malibu, California 90265, United States
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2
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Abstract
One-atom-thick crystalline layers and their vertical heterostructures carry the promise of designer electronic materials that are unattainable by standard growth techniques. To realize their potential it is necessary to isolate them from environmental disturbances, in particular those introduced by the substrate. However, finding and characterizing suitable substrates, and minimizing the random potential fluctuations they introduce, has been a persistent challenge in this emerging field. Here we show that Landau-level (LL) spectroscopy offers the unique capability to quantify both the reduction of the quasiparticles' lifetime and the long-range inhomogeneity due to random potential fluctuations. Harnessing this technique together with direct scanning tunneling microscopy and numerical simulations we demonstrate that the insertion of a graphene buffer layer with a large twist angle is a very effective method to shield a 2D system from substrate interference that has the additional desirable property of preserving the electronic structure of the system under study. We further show that owing to its remarkable nonlinear screening capability a single graphene buffer layer provides better shielding than either increasing the distance to the substrate or doubling the carrier density and reduces the amplitude of the potential fluctuations in graphene to values even lower than the ones in AB-stacked bilayer graphene.
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3
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Huang J, Pfeiffer LN, West KW. Influence of Coulomb interaction of tunable shapes on the collective transport of ultradilute two-dimensional holes. PHYSICAL REVIEW LETTERS 2014; 112:036803. [PMID: 24484159 DOI: 10.1103/physrevlett.112.036803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Indexed: 06/03/2023]
Abstract
In high quality updoped GaAs field-effect transistors, the two-dimensional charge carrier concentrations can be tuned to very low values similar to the density of electrons on helium surfaces. An important interaction effect, screening of the Coulomb interaction by the gate, rises as a result of the large charge spacing comparable to the distance between the channel and the gate. Based on the results of the temperature (T) dependence of the resistivity from measuring four different samples, a power-law characteristic is found for charge densities ≤2×10(9) cm(-2). Moreover, the exponent exhibits a universal dependence on a single dimensionless parameter, the ratio between the mean carrier separation and the distance to the metallic gate that screens the Coulomb interaction. Thus, the electronic properties are tuned through varying the shape of the interaction potential.
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Affiliation(s)
- Jian Huang
- Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, USA
| | - L N Pfeiffer
- Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
| | - K W West
- Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544, USA
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4
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Burson KM, Cullen WG, Adam S, Dean CR, Watanabe K, Taniguchi T, Kim P, Fuhrer MS. Direct imaging of charged impurity density in common graphene substrates. NANO LETTERS 2013; 13:3576-3580. [PMID: 23879288 DOI: 10.1021/nl4012529] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Kelvin probe microscopy in ultrahigh vacuum is used to image the local electrostatic potential fluctuations above hexagonal boron nitride (h-BN) and SiO2, common substrates for graphene. Results are compared to a model of randomly distributed charges in a two-dimensional (2D) plane. For SiO2, the results are well modeled by 2D charge densities ranging from 0.24 to 2.7 × 10(11) cm(-2), while h-BN displays potential fluctuations 1-2 orders of magnitude lower than SiO2, consistent with the improvement in charge carrier mobility for graphene on h-BN compared to SiO2. Electron beam exposure of SiO2 increases the charge density fluctuations, creating long-lived metastable charge populations of ~2 × 10(11) cm(-2) at room temperature, which can be reversed by heating.
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Affiliation(s)
- Kristen M Burson
- Center for Nanophysics and Advanced Materials, University of Maryland, College Park, Maryland 20742-4111, United States
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5
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Väyrynen JI, Goldstein M, Glazman LI. Helical edge resistance introduced by charge puddles. PHYSICAL REVIEW LETTERS 2013; 110:216402. [PMID: 23745899 DOI: 10.1103/physrevlett.110.216402] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Indexed: 06/02/2023]
Abstract
We study the influence of electron puddles created by doping of a 2D topological insulator on its helical edge conductance. A single puddle is modeled by a quantum dot tunnel coupled to the helical edge. It may lead to significant inelastic backscattering within the edge because of the long electron dwelling time in the dot. We find the resulting correction to the perfect edge conductance. Generalizing to multiple puddles, we assess the dependence of the helical edge resistance on the temperature and doping level and compare it with recent experimental data.
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Affiliation(s)
- Jukka I Väyrynen
- Department of Physics, Yale University, New Haven, Connecticut 06520, USA
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6
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Rossi E, Das Sarma S. Inhomogenous electronic structure, transport gap, and percolation threshold in disordered bilayer graphene. PHYSICAL REVIEW LETTERS 2011; 107:155502. [PMID: 22107299 DOI: 10.1103/physrevlett.107.155502] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2011] [Indexed: 05/31/2023]
Abstract
The inhomogenous real-space electronic structure of gapless and gapped disordered bilayer graphene is calculated in the presence of quenched charge impurities. For gapped bilayer graphene, we find that for current experimental conditions the amplitude of the fluctuations of the screened disorder potential is of the order of (or often larger than) the intrinsic gap Δ induced by the application of a perpendicular electric field. We calculate the crossover chemical potential Δ(cr), separating the insulating regime from a percolative regime in which less than half of the area of the bilayer graphene sample is insulating. We find that most of the current experiments are in the percolative regime with Δ(cr)≪Δ. The huge suppression of Δ(cr) compared with Δ provides a possible explanation for the large difference between the theoretical band gap Δ and the experimentally extracted transport gap.
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Affiliation(s)
- E Rossi
- Department of Physics, College of William and Mary, Williamsburg, Virginia 23187, USA
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7
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Ang PK, Jaiswal M, Lim CHYX, Wang Y, Sankaran J, Li A, Lim CT, Wohland T, Barbaros O, Loh KP. A bioelectronic platform using a graphene-lipid bilayer interface. ACS NANO 2010; 4:7387-7394. [PMID: 21067155 DOI: 10.1021/nn1022582] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The electronic properties of graphene can be modulated by charged lipid bilayer adsorbing on the surface. Biorecognition events which lead to changes in membrane integrity can be monitored electrically using an electrolyte-gated biomimetic membrane-graphene transistor. Here, we demonstrate that the bactericidal activity of antimicrobial peptides can be sensed electrically by graphene based on a complex interplay of biomolecular doping and ionic screening effect.
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Affiliation(s)
- Priscilla Kailian Ang
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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8
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Li W, Luhman DR, Tsui DC, Pfeiffer LN, West KW. Observation of reentrant phases induced by short-range disorder in the lowest Landau level of Al{x}Ga{1-x}As/Al{0.32}Ga{0.68}as heterostructures. PHYSICAL REVIEW LETTERS 2010; 105:076803. [PMID: 20868067 DOI: 10.1103/physrevlett.105.076803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Revised: 06/02/2010] [Indexed: 05/29/2023]
Abstract
We report the observation of a reentrant quantum Hall effect in the lowest Landau level between filling factors of 2/3 and 3/5 in a Al{x}Ga{1-x}As/Al{0.32}Ga{0.68}As heterostructure sample with x=0.85%. A reentrant insulating phase is also observed between filling factors of 2/5 and 1/3, demonstrating particle-hole symmetry between these phases. A sample with x=0.21% shows much weaker reentrant features, indicating that increased short-range scattering, due to the Al alloy in the conduction channel, aids in the formation of these phases.
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Affiliation(s)
- Wanli Li
- Department of Physics, Princeton University, Princeton, New Jersey 08544, USA
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9
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Fogler MM. Neutrality point of graphene with coplanar charged impurities. PHYSICAL REVIEW LETTERS 2009; 103:236801. [PMID: 20366162 DOI: 10.1103/physrevlett.103.236801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2008] [Revised: 11/12/2009] [Indexed: 05/29/2023]
Abstract
The ground state and the transport properties of graphene subject to the potential of in-plane charged impurities are studied. The screening of the impurity potential is shown to be nonlinear, producing a fractal structure of electron and hole puddles. Statistical properties of this density distribution as well as the charge compressibility of the system are calculated in the leading-log approximation. The conductivity depends logarithmically on alpha, the dimensionless strength of the Coulomb interaction. The theory is asymptotically exact when alpha is small, which is the case for graphene on a substrate with a high dielectric constant.
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Affiliation(s)
- Michael M Fogler
- Department of Physics, University of California San Diego, La Jolla, 9500 Gilman Drive, California 92093, USA
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10
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Murthy G. Hamiltonian theory of disorder at nu = 1/3. PHYSICAL REVIEW LETTERS 2009; 103:206802. [PMID: 20365998 DOI: 10.1103/physrevlett.103.206802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2009] [Indexed: 05/29/2023]
Abstract
The Hamiltonian theory of the fractional quantum Hall regime provides a simple and tractable approach to calculating gaps, polarizations, and many other physical quantities. In this Letter we include disorder in our treatment and show that a simple model with minimal assumptions produces results consistent with a range of experiments. In particular, the interplay between disorder and interactions can result in experimental signatures which mimic those of spin textures.
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Affiliation(s)
- Ganpathy Murthy
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055, USA.
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11
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Murthy G, Sachdev S. Quantum Hall to insulator transition in the bilayer quantum Hall ferromagnet. PHYSICAL REVIEW LETTERS 2008; 101:226801. [PMID: 19113502 DOI: 10.1103/physrevlett.101.226801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2008] [Indexed: 05/27/2023]
Abstract
We describe a phase transition of the bilayer quantum Hall ferromagnet at nu=1. In the presence of static disorder (modeled by a periodic potential), bosonic S=1/2 spinons undergo a superfluid-insulator transition while preserving ferromagnetism. The Mott insulating phase has an emergent U(1) photon, and the transition is between Higgs and Coulomb phases of this photon. Consequences for charge and counterflow conductivity and for interlayer tunneling conductance are discussed.
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Affiliation(s)
- Ganpathy Murthy
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055, USA
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12
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Yamaguchi M, Nomura S, Maruyama T, Miyashita S, Hirayama Y, Tamura H, Akazaki T. Evidence of a transition from nonlinear to linear screening of a two-dimensional electron system detected by photoluminescence spectroscopy. PHYSICAL REVIEW LETTERS 2008; 101:207401. [PMID: 19113378 DOI: 10.1103/physrevlett.101.207401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2008] [Indexed: 05/27/2023]
Abstract
We clearly identify single-electron-localization (SEL), nonlinear screening (NLS), and linear screening (LS) regimes of gate induced electrons in a GaAs quantum well from photoluminescence spectra and intergate capacitance. Neutral and charged excitons observed in the SEL regime rapidly lose their oscillator strength when electron puddles are formed, which mark the onset of NLS. A further increase in the density of the electrons induces the transition from the NLS to LS, where the emission of a charged exciton changes to the recombination of two-dimensional electron gas and a hole.
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Affiliation(s)
- M Yamaguchi
- NTT Basic Research Laboratories, NTT Corporation, 3-1 Morinosato-Wakamiya, Atsugi-shi, Kanagawa 243-0198, Japan
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13
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Roostaei B, Mullen KJ, Fertig HA, Simon SH. Theory of activated transport in bilayer quantum Hall systems. PHYSICAL REVIEW LETTERS 2008; 101:046804. [PMID: 18764355 DOI: 10.1103/physrevlett.101.046804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Indexed: 05/26/2023]
Abstract
We analyze the transport properties of bilayer quantum Hall systems at total filling factor nu=1 in drag geometries as a function of interlayer bias, in the limit where the disorder is sufficiently strong to unbind meron-antimeron pairs, the charged topological defects of the system. We compute the typical energy barrier for these objects to cross incompressible regions within the disordered system using a Hartree-Fock approach, and show how this leads to multiple activation energies when the system is biased. We then demonstrate using a bosonic Chern-Simons theory that in drag geometries current in a single layer directly leads to forces on only two of the four types of merons, inducing dissipation only in the drive layer. Dissipation in the drag layer results from interactions among the merons, resulting in very different temperature dependences for the drag and drive layers, in qualitative agreement with experiment.
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Affiliation(s)
- B Roostaei
- Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106, USA
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14
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Abstract
We demonstrate theoretically that most of the observed transport properties of graphene sheets at zero magnetic field can be explained by scattering from charged impurities. We find that, contrary to common perception, these properties are not universal but depend on the concentration of charged impurities n(imp). For dirty samples (250 x 10(10) cm(-2) < n(imp) < 400 x 10(10) cm(-2)), the value of the minimum conductivity at low carrier density is indeed 4e(2)/h in agreement with early experiments, with weak dependence on impurity concentration. For cleaner samples, we predict that the minimum conductivity depends strongly on n(imp), increasing to 8e(2)/h for n(imp) approximately 20 x 10(10) cm(-2). A clear strategy to improve graphene mobility is to eliminate charged impurities or use a substrate with a larger dielectric constant.
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15
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Allison G, Galaktionov EA, Savchenko AK, Safonov SS, Fogler MM, Simmons MY, Ritchie DA. Thermodynamic density of states of two-dimensional GaAs systems near the apparent metal-insulator transition. PHYSICAL REVIEW LETTERS 2006; 96:216407. [PMID: 16803263 DOI: 10.1103/physrevlett.96.216407] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2005] [Indexed: 05/10/2023]
Abstract
We perform combined resistivity and compressibility studies of two-dimensional hole and electron systems which show the apparent metal-insulator transition--a crossover in the sign of deltaR/deltaT with changing density. No thermodynamic anomalies have been detected in the crossover region. Instead, despite a tenfold difference in r(s), the compressibility of both electrons and holes is well described by the theory of nonlinear screening of the random potential. We show that the resistivity exhibits a scaling behavior near the percolation threshold found from analysis of the compressibility. Notably, the percolation transition occurs at a much lower density than the crossover.
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Affiliation(s)
- G Allison
- School of Physics, University of Exeter, Exeter EX4 4QL, United Kingdom
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16
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Fertig HA, Murthy G. Coherence network in the quantum Hall bilayer. PHYSICAL REVIEW LETTERS 2005; 95:156802. [PMID: 16241749 DOI: 10.1103/physrevlett.95.156802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2005] [Indexed: 05/05/2023]
Abstract
Recent experiments on quantum Hall bilayers near total filling factor 1 have demonstrated that they support an imperfect two-dimensional superfluidity, in which there is nearly dissipationless transport at nonvanishing temperature observed both in counterflow resistance and interlayer tunneling. We argue that this behavior may be understood in terms of a coherence network induced in the bilayer by disorder, in which an incompressible, coherent state exists in narrow regions separating puddles of dense vortex-antivortex pairs. A renormalization group analysis shows that it is appropriate to describe the system as a vortex liquid. We demonstrate that the dynamics of the nodes of the network leads to a power law temperature dependence of the tunneling resistance, whereas thermally activated hops of vortices across the links control the counterflow resistance.
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Affiliation(s)
- H A Fertig
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
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17
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Ilani S, Martin J, Teitelbaum E, Smet JH, Mahalu D, Umansky V, Yacoby A. The microscopic nature of localization in the quantum Hall effect. Nature 2004; 427:328-32. [PMID: 14737162 DOI: 10.1038/nature02230] [Citation(s) in RCA: 165] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2003] [Accepted: 11/21/2003] [Indexed: 11/09/2022]
Abstract
The quantum Hall effect arises from the interplay between localized and extended states that form when electrons, confined to two dimensions, are subject to a perpendicular magnetic field. The effect involves exact quantization of all the electronic transport properties owing to particle localization. In the conventional theory of the quantum Hall effect, strong-field localization is associated with a single-particle drift motion of electrons along contours of constant disorder potential. Transport experiments that probe the extended states in the transition regions between quantum Hall phases have been used to test both the theory and its implications for quantum Hall phase transitions. Although several experiments on highly disordered samples have affirmed the validity of the single-particle picture, other experiments and some recent theories have found deviations from the predicted universal behaviour. Here we use a scanning single-electron transistor to probe the individual localized states, which we find to be strikingly different from the predictions of single-particle theory. The states are mainly determined by Coulomb interactions, and appear only when quantization of kinetic energy limits the screening ability of electrons. We conclude that the quantum Hall effect has a greater diversity of regimes and phase transitions than predicted by the single-particle framework. Our experiments suggest a unified picture of localization in which the single-particle model is valid only in the limit of strong disorder.
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Affiliation(s)
- S Ilani
- Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
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18
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Ilani S, Yacoby A, Mahalu D, Shtrikman H. Unexpected behavior of the local compressibility near the B = 0 metal-insulator transition. PHYSICAL REVIEW LETTERS 2000; 84:3133-3136. [PMID: 11019030 DOI: 10.1103/physrevlett.84.3133] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/1999] [Indexed: 05/23/2023]
Abstract
We have measured the local electronic compressibility of a two-dimensional hole gas as it crosses the B = 0 metal-insulator transition. In the metallic phase, the compressibility follows the mean-field Hartree-Fock (HF) theory and is found to be spatially homogeneous. In the insulating phase it deviates by more than an order of magnitude from the HF predictions and is spatially inhomogeneous. The crossover density between the two types of behavior agrees quantitatively with the transport critical density, suggesting that the system undergoes a thermodynamic change at the transition.
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Affiliation(s)
- S Ilani
- Braun Center for Submicron Research, Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel
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19
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Polyakov DG. Spin-flip scattering in the quantum Hall regime. PHYSICAL REVIEW. B, CONDENSED MATTER 1996; 53:15777-15788. [PMID: 9983414 DOI: 10.1103/physrevb.53.15777] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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20
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Fogler MM, Shklovskii BI. Collapse of spin splitting in the quantum Hall effect. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:17366-17378. [PMID: 9981166 DOI: 10.1103/physrevb.52.17366] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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21
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Balaban NQ, Meirav U, Shtrikman H. Crossover between different regimes of current distribution in the quantum Hall effect. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:R5503-R5506. [PMID: 9981815 DOI: 10.1103/physrevb.52.r5503] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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22
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Manolescu A. Density profile in a weakly modulated two-dimensional system in a magnetic field. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 52:2831-2837. [PMID: 9981354 DOI: 10.1103/physrevb.52.2831] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Manolescu A, Gerhardts RR. Exchange-enhanced spin splitting in a two-dimensional electron system with lateral modulation. PHYSICAL REVIEW. B, CONDENSED MATTER 1995; 51:1703-1713. [PMID: 9978890 DOI: 10.1103/physrevb.51.1703] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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24
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Larkin IA, Sukhorukov EV. Method to investigate the random potential in a quantum point contact. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:5498-5507. [PMID: 10011504 DOI: 10.1103/physrevb.49.5498] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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25
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Wang T, Clark KP, Spencer GF, Mack AM, Kirk WP. Magnetic-field-induced metal-insulator transition in two dimensions. PHYSICAL REVIEW LETTERS 1994; 72:709-712. [PMID: 10056503 DOI: 10.1103/physrevlett.72.709] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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26
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Raikh ME, Shahbazyan TV. Magnetocapacitance oscillations in a periodically modulated two-dimensional electron gas in the presence of a smooth random potential. PHYSICAL REVIEW. B, CONDENSED MATTER 1994; 49:1935-1942. [PMID: 10010993 DOI: 10.1103/physrevb.49.1935] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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27
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Burnett VG, Efros AL, Pikus FG. Magnetotransport through antidot and dot lattices in two-dimensional structures. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:14365-14372. [PMID: 10007855 DOI: 10.1103/physrevb.48.14365] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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28
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Kheng K, Cox RT, Bassani F, Saminadayar K, Tatarenko S. Observation of negatively charged excitons X- in semiconductor quantum wells. PHYSICAL REVIEW LETTERS 1993; 71:1752-1755. [PMID: 10054489 DOI: 10.1103/physrevlett.71.1752] [Citation(s) in RCA: 106] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Yarlagadda S. Negative thermodynamic density of states and charge-density-wave instability in the lowest Landau level. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 48:4707-4712. [PMID: 10008955 DOI: 10.1103/physrevb.48.4707] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Pikus FG, Efros AL. Distribution of electron density and magnetocapacitance in the regime of the fractional quantum Hall effect. PHYSICAL REVIEW. B, CONDENSED MATTER 1993; 47:16395-16403. [PMID: 10006070 DOI: 10.1103/physrevb.47.16395] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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