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  • Author(s):
    Ramesh Shrestha, Yuxuan Luan, Xiao Luo, Summi Shi, Teng Zhang, Phil Smith, Wei Gong, Michael Bockstaller, Tenfei Luo, Renkun Chen, Kedar Hippalgaonkar, Shen Shen
    Abstract:

    Thermal rectification is an exotic thermal transport phenomenon which allows heat to transfer in one direction but block the other. We demonstrate an unusual dual-mode solid-state thermal rectification effect using a heterogeneous “irradiated-pristine” polyethylene nanofiber junction as a nanoscale thermal diode, in which heat flow can be rectified in both directions by changing the working temperature. For the nanofiber samples measured here, we observe a maximum thermal rectification factor…

    Date Published:
    2020-06
    Record Visibility:
    Public
  • Author(s):
    Eduard Aleksanyan, Ani Aprahamian, Alexander S. Mukasyan, Vachagan Harutyunyan, Khachatur Manukyan
    Abstract:

    Cesium lead iodide with cubic perovskite structure (a-CsPbI3) is gaining sig- nificant interest in photovoltaic applications due to its excellent absorbance of the visible solar light and other attractive optoelectronic properties. However, the synthesis of stable a-CsPbI3 poses a significant challenge. Mechanochemical synthesis is emerging as a suitable method for the preparation of cesium lead halides. This work investigates the ball milling-induced synthesis of cesium lead halides perovski…

    Date Published:
    2020-04
    Record Visibility:
    Public
  • Author(s):
    Rachel Bonek, Gregory Snider, Alexei Orlov
    Abstract:

    In this paper, we present results demonstrating the effect of temperature on singular- ity matching (SM) tunneling down to 300 mK in superconducting single-electron transistors (SSETs). The studied SSETs have charging energies significantly larger than the Josephson energy, which makes it possible to study the SM condition with- out other sub-superconducting gap conduction mechanisms obscuring the SM signa- tures at low biases. The presence of parity in one such device has also allowed us to …

    Date Published:
    2019-03
    Record Visibility:
    Public