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Diffuson-driven Ultralow Thermal Conductivity in Amorphous Nb2O5 Thin Films
Zhe Cheng, Alex Weidenbach, Tianli Feng +9
Niobium pentoxide (Nb2O5) has been extensively reported for applications of electrochemical energy storage, memristors, solar cells, light emitting diodes (LEDs), and electrochromi…
Tunable Thermal Energy Transport across Diamond Membranes and Diamond-Si Interfaces by Nanoscale Graphoepitaxy
Zhe Cheng, Tingyu Bai, Jingjing Shi +14
The development of electronic devices, especially those that involve heterogeneous integration of materials, has led to increased challenges in addressing their thermal operational…
The Effect of Intrinsic Crumpling on the Mechanics of Free-Standing Graphene
Ryan J. T. Nicholl, Hiram J. Conley, Nickolay V. Lavrik +5
Free-standing graphene is inherently crumpled in the out-of-plane direction due to dynamic flexural phonons and static wrinkling. We explore the consequences of this crumpling on t…
Probing excitonic states in ultraclean suspended two-dimensional semiconductors by photocurrent spectroscopy
A. R. Klots, A. K. M. Newaz, Bin Wang +12
The optical response of semiconducting monolayer transition-metal dichalcogenides (TMDCs) is dominated by strongly bound excitons that are stable even at room temperature. However,…
Bandgap Engineering of Strained Monolayer and Bilayer MoS2
Hiram J. Conley, Bin Wang, Jed I. Ziegler +3
We report the influence of uniaxial tensile mechanical strain in the range 0-2.2% on the phonon spectra and bandstructures of monolayer and bilayer molybdenum disulfide (MoS2) two-…
Probing charge scattering mechanisms in suspended graphene by varying its dielectric environment
A. K. M. Newaz, Yevgeniy S. Puzyrev, Bin Wang +2
Graphene with high carrier mobility μ is required both for graphene-based electronic devices and for the investigation of the fundamental properties of graphene's Dirac fermions. I…
Spin-dependent resonant tunneling through quantum-well states in magnetic metallic thin films
Zhong-Yi Lu, X. -G. Zhang, Sokrates T. Pantelides
Quantum-well (QW) states in {\it nonmagnetic} metal layers contained in magnetic multilayers are known to be important in spin-dependent transport, but the role of QW states in {\i…