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Advanced microelectronics in the future may require semiconducting channel materials beyond silicon. Two-dimensional (2D) semiconductors, characterized by their atomically thin thickness, hold immense promise for high-performance electronic…

We report on the fabrication and characterization of single crystal field-effect transistors (FETs) based on diphenylbenzo diselenophene (DPh-BDSe). These organic field-effect transistors (OFETs) function as p-channel accumulation-mode…

材料科学 · 物理学 2009-11-10 R. Zeis , Ch. Kloc , K. Takimiya , Y. Kunugi , Y. Konda , N. Niihara , T. Otsubo

We present theoretical calculations of the optical spectrum of monolayer MoS$_2$ with a charged defect. In particular, we solve the Bethe-Salpeter equation based on an atomistic tight-binding model of the MoS$_2$ electronic structure which…

材料科学 · 物理学 2023-07-11 Martik Aghajanian , Arash A. Mostofi , Johannes Lischner

We report a direct detection of time correlated single-electron tunneling oscillations in a series array of small tunnel junctions. Here the current, I, is made up of a lattice of charge solitons moving throughout the array by time…

介观与纳米尺度物理 · 物理学 2007-05-23 Jonas Bylander , Tim Duty , Per Delsing

We have developed a fabrication process for nanoscale tunnel junctions which includes focused-ion-beam etching from different directions. By applying the process to a Nb/(Al-)Al_2O_3/Nb trilayer, we have fabricated a Nb single-electron…

介观与纳米尺度物理 · 物理学 2007-05-23 Michio Watanabe , Yasunobu Nakamura , Jaw-Shen Tsai

The electrostatic coupling between singled-walled carbon nanotube (SWNT) networks/arrays and planar gate electrodes in thin-film transistors (TFTs) is analyzed both in the quantum limit with an analytical model and in the classical limit…

材料科学 · 物理学 2010-01-12 Qing Cao , Minggang Xia , Coskun Kocabas , Moonsub Shim , John A. Rogers , Slava V. Rotkin

By operating the radio frequency single electron transistor (rf-SET) as a mixer we present measurements in which the RC roll-off of the tunnel junctions is observed at high frequencies. Our technique makes use of the non-linear rf-SET…

介观与纳米尺度物理 · 物理学 2015-06-24 D. J. Reilly , T. M. Buehler

We determined the interface state density ($D_{\rm it}$) distributions in the vicinity of the conduction band edge in silicon carbide (SiC) metal-oxide-semiconductor (MOS) structures by reproducing the experimental current-voltage…

材料科学 · 物理学 2020-09-07 Koji Ito , Takuma Kobayashi , Tsunenobu Kimoto

The fabrication of micro- and nano-scale silicon electronic devices requires precision lithography and controlled processing to ensure that the electronic properties of the device are optimized. Importantly, the Si-SiO2 interface plays a…

Density functional theory paired with a first order many-body perturbation theory correction is applied to determine formation energies and charge transition energies for point defects in bulk In_0.53Ga_0.47As and for models of the…

介观与纳米尺度物理 · 物理学 2017-03-08 Gabriel Greene-Diniz , Kelin J. Kuhn , Paul K. Hurley , James C. Greer

The electrical performance of a tunnel field-effect transistor depends critically on the band offset at their semiconductor heterojunction interface. Historically, it has been difficult to experimentally determine how the electronic bands…

We investigate a silicon single-electron transistor (SET) in a metal-oxide-semiconductor (MOS) structure by applying a magnetic field perpendicular to the sample surface. The quantum dot is defined electrostatically in a point contact…

介观与纳米尺度物理 · 物理学 2015-05-13 Binhui Hu , C. H. Yang

We have fabricated and characterized a single hole transistor in an undoped AlGaAs-GaAs heterostructure. Our device consists of a p-type quantum dot, populated using an electric field rather than modulation doping. Low temperature transport…

介观与纳米尺度物理 · 物理学 2015-05-18 O. Klochan , J. C. H. Chen , A. P. Micolich , A. R. Hamilton , K. Muraki , Y. Hirayama

We report on low-temperature electronic transport measurements of a silicon metal-oxide-semiconductor quantum dot, with independent gate control of electron densities in the leads and the quantum dot island. This architecture allows the dot…

介观与纳米尺度物理 · 物理学 2015-05-14 W. H. Lim , F. A. Zwanenburg , H. Huebl , M. Mottonen , K. W. Chan , A. Morello , A. S. Dzurak

We fabricated silicon metal-oxide-semiconductor field effect transistors where an additional sodium-doped layer was incorporated into the oxide to create potential fluctuations at the Si-SiO2 interface. The amplitude of these fluctuations…

强关联电子 · 物理学 2010-10-12 T. Ferrus , R. George , C. H. W. Barnes , M. Pepper

The long term scaling prospects for solid-state quantum computing architectures relies heavily on the ability to simply and reliably measure and control the coherent electron interaction strength, known as the tunnel coupling, $t_c$. Here,…

We report charge sensing measurements of a silicon metal-oxide-semiconductor quantum dot using a single-electron transistor as a charge sensor with dynamic feedback control. Using digitallycontrolled feedback, the sensor exhibits sensitive…

介观与纳米尺度物理 · 物理学 2011-10-20 C. H. Yang , W. H. Lim , F. A. Zwanenburg , A. S. Dzurak

We introduce a silicon metal-oxide-semiconductor quantum dot architecture based on a single polysilicon gate stack. The elementary structure consists of two enhancement gates separated spatially by a gap, one gate forming a reservoir and…

The atomic and electronic structures of the (001)-Si/(001)-gamma-Al2O3 heterointerface are investigated by first principles total energy calculations combined with a newly developed "modified basin-hopping" method. It is found that all…

材料科学 · 物理学 2009-09-10 H. J. Xiang , Juarez L. F. Da Silva , Howard M. Branz , Su-Huai Wei

We propose a semi-suspended device structure and construct nanogapped, hysteresis-free field-effect transistors (FETs), based on the van der Waals stacking technique. The structure, which features a semi-suspended channel above a…

介观与纳米尺度物理 · 物理学 2023-06-29 Jiachen Tang , Luhao Liu , Yinjiang Shao , Xinran Wang , Yi Shi , Songlin Li