Search Results - "Sambandamurthy, G."
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Scalable Hydrothermal Synthesis of Free-Standing VO2 Nanowires in the M1 Phase
Published in ACS applied materials & interfaces (24-09-2014)“…VO2 nanostructures derived from solution-phase methods are often plagued by broadened and relatively diminished metal–insulator transitions and adventitious…”
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Measurements of the magnetic-field-tuned conductivity of disordered two-dimensional Mo43Ge57 and InOx superconducting films: evidence for a universal minimum superfluid response
Published in Physical review letters (18-01-2013)“…Our measurements of the low frequency ac conductivity in strongly disordered two-dimensional films near the magnetic-field-tuned superconductor-to-insulator…”
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Separating electric field and thermal effects across the metal-insulator transition in vanadium oxide nanobeams
Published in Applied physics letters (06-07-2015)“…We present results from an experimental study of the equilibrium and non-equilibrium transport properties of vanadium oxide nanobeams near the metal-insulator…”
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Superconductivity-related insulating behavior
Published in Physical review letters (12-03-2004)“…We present the results of an experimental study of superconducting, disordered, thin films of amorphous indium oxide. These films can be driven from the…”
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Melting of a 2D quantum electron solid in high magnetic field
Published in Nature physics (01-07-2006)“…The melting temperature Tm of a solid is generally determined by its solid-liquid transition on being heated at a fixed pressure, usually ambient pressure. It…”
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Experimental evidence for a collective insulating state in two-dimensional superconductors
Published in Physical review letters (14-01-2005)“…We present the results of an experimental study of the current-voltage characteristics in a strong magnetic field (B) of disordered, superconducting, thin…”
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Nanowire acting as a superconducting quantum interference device
Published in Physical review letters (09-09-2005)“…We present the results from an experimental study of the magnetotransport of superconducting wires of amorphous indium-oxide having widths in the range 40-120…”
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Synthesis, Spectroscopic Characterization, and Observation of Massive MetalInsulator Transitions in Nanowires of a Nonstoichiometric Vanadium Oxide Bronze
Published in Nano letters (14-07-2010)“…Metalinsulator transitions in strongly correlated materials, induced by varying either temperature or dopant concentration, remain a topic of enduring…”
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Electrically driven metal-insulator switching in δ-KxV2O5 nanowires
Published in Applied physics letters (15-10-2012)“…Metal-insulator transition (MIT) in δ-KxV2O5 nanowires is studied via tuning temperature, voltage, and current. In the temperature-driven case, a massive drop…”
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Pinning mode resonances of 2D electron stripe phases: effect of an in-plane magnetic field
Published in Physical review letters (03-04-2009)“…We study the anisotropic pinning-mode resonances in the rf conductivity spectra of the stripe phase of 2D electron systems around a Landau level filling of…”
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Pinning-mode resonance of a Skyrme crystal near Landau-level filling factor ν=1
Published in Physical review letters (04-06-2010)“…Microwave pinning-mode resonances found around integer quantum Hall effects, are a signature of crystallized quasiparticles or holes. Application of in-plane…”
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Charge Disproportionation and Voltage‐Induced Metal–Insulator Transitions Evidenced in β‐Pb x V 2 O 5 Nanowires
Published in Advanced functional materials (14-01-2013)“…Abstract The roster of materials exhibiting metal–insulator transitions with sharply discontinuous switching of electrical conductivity close to room…”
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Angular dependence of the magnetic-field driven superconductor–insulator transition in thin films of amorphous indium-oxide
Published in Solid state communications (01-05-2011)“…A significant anisotropy of the magnetic-field driven superconductor–insulator transition is observed in thin films of amorphous indium-oxide. The anisotropy…”
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Observation of pinning mode of stripe phases of 2D systems in high Landau levels
Published in Physical review letters (27-06-2008)“…We study the radio-frequency diagonal conductivities of the anisotropic stripe phases of higher Landau levels near half-integer fillings. In the hard…”
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Power law resistivity behavior in 2D superconductors across the magnetic field-tuned superconductor-insulator transition
Published in Europhysics letters (01-08-2006)“…We present the results of a systematic study of thin films of amorphous indium-oxide near the superconductor-insulator transition. We show that the film's…”
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Pinning mode resonances of two-dimensional electron stripe phases at high Landau levels
Published in Physica. B, Condensed matter (01-03-2009)“…This paper presents the radio-frequency (rf) diagonal conductivity spectra of two-dimensional electrons in the second excited and higher Landau levels, and in…”
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Journal Article Conference Proceeding -
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Direct observation of quantum superconducting fluctuations across the 2D superconductor-insulator transition
Published in Physica. B, Condensed matter (01-04-2008)“…We review our recent measurements of the complex AC conductivity of thin InO x films studied as a function of magnetic field through the nominal 2D…”
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Journal Article Conference Proceeding -
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Josephson junction array type I-V characteristics of quench-condensed ultra thin films of Bi
Published in Solid state communications (01-07-2000)“…In this communication we report studies of dc current-voltage (I-V) characteristics of ultra thin films of Bi, quench condensed on single crystal sapphire…”
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Granular insulator–superconductor transition in ultrathin Bi films
Published in Solid state communications (23-05-2001)“…We have studied the insulator–superconductor transition (IST) by tuning the thickness in quench-condensed Bi films. The resistive transitions of the…”
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