Masayuki Ohmaki

Comparative study of macroscopic quantum tunneling in Bi2Sr2CaCu2Oy intrinsic Josephson junctions with different device structures

We investigated macroscopic quantum tunneling (MQT) of Bi

First Playback of High-Definition Video Contents from Super-Resolution Near-Field Structure Optical Disc

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Bit-Error-Rate Evaluation of Super-Resolution Near-Field Structure Read-Only Memory Discs with Semiconductive Material InSb

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Fabrication of Small Mesa Structures of Bi2Sr2CaCu2O8+δ Intrinsic Josephson Junctions Using Polyimide Process: Improvement of Current–Voltage Characteristics with a Very Small Number of Junctions

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One-Beam Push–Pull Method with Simple Holographic Optical Element for Multilayer Blu-ray Discs

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SIN feature observed in intrinsic Josephson junction characteristics for overdoped Bi2Sr2CaCu2O8+δ

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Overdoped High Current Density Bi2–xPbxSr2CaCu2O8+δ Intrinsic Josephson Junction Mesas and Their Switching Current Distributions

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Macroscopic quantum tunneling and thermal activation in a small mesa structured Bi2Sr2CaCu2Oy intrinsic Josephson junctions

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Short-Pulse Intrinsic Tunneling Spectroscopy in Bi2Sr2CaCu2O8+δ under Suppressed Self Heating

intrinsic Josephson junctions (IJJs) with two device structures. One is a nanometer-thick small mesa structure with only two or three IJJs and the other is a stack of a few hundreds of IJJs on a narrow bridge structure. Experimental results of switching current distribution for the first switching events from zero-voltage state showed a good agreement with the conventional theory for a single Josephson junction, indicating that a crossover temperature from thermal activation to MQT regime for the former device structure was as high as that for the latter device structure. Together with the observation of multiphoton transitions between quantized energy levels in MQT regime, these results strongly suggest that the observed MQT behavior is intrinsic to a single IJJ in high-

Tunneling characteristics for nm-thick mesas consisting of a few intrinsic Josephson junctions

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