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Articles by Jong E. Han
Giant shot noise in superconductor/ferromagnet junctions with orbital-symmetry- controlled spin-orbit coupling - Nature Communications
Abstract By measuring the shot noise, a consequence of charge quantization, in super-conductor/insulator/ferromagnet (V/MgO/Fe) junctions, we discover a giant increase, orders of magnitude larger than expected. The origin of this giant noise is a peculiar realization of a superconducting proximity effect, where a simple superconductor influences its neighbors. Our measurements reveal largely unexplored implications of orbital-symmetry-controlled proximity effects.
Adherence to the nutritional recommendations according to diabetes status in Korean adults: a cross-sectional study - BMC Public Health
The KNHANES has been a national surveillance system conducted by the Korea Centers for Disease Control and Prevention since 1998. This cross-sectional survey assesses the health and nutritional status of approximately 10,000 Koreans annually, collecting data on socioeconomic status, health behaviors, quality of life, healthcare utilization, anthropometrics, biochemical profiles, and dietary intake.
Avalanche instability as nonequilibrium quantum criticality
A fundamental instability in the nonequilibrium conduction band under an electric field bias is proposed via the spontaneous emission of coherent phonons. Analytic theory, supported by numerical calculations, establishes that the quantum avalanche, an abrupt nonequilibrium occupation of excited bands, results from the competition between the collapse of the band minimum via the phonon emission and the dephasing of the electron with the environment.
Correlated insulator collapse due to quantum avalanche via in-gap ladder states - Nature Communications
Abstract The significant discrepancy observed between the predicted and experimental switching fields in correlated insulators under a DC electric field far-from-equilibrium necessitates a reevaluation of current microscopic understanding. Here we show that an electron avalanche can occur in the bulk limit of such insulators at arbitrarily small electric field by introducing a generic model of electrons coupled to an inelastic medium of phonons.
Signatures of hot carriers and hot phonons in the re-entrant metallic and semiconducting states of Moiré-gapped graphene - Nature Communications
Abstract Stacking of graphene with hexagonal boron nitride (h-BN) can dramatically modify its bands from their usual linear form, opening a series of narrow minigaps that are separated by wider minibands. While the resulting spectrum offers strong potential for use in functional (opto)electronic devices, a proper understanding of the dynamics of hot carriers in these bands is a prerequisite for such applications.
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