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We report on the influence of the chemical composition on the electronic properties of molybdenum oxynitrides thin films grown by reactive sputtering on Si (100) substrates at room temperature. The partial pressure of Ar was fixed at 90 %,…

材料科学 · 物理学 2020-07-07 J. A. Hofer , S. Bengio , G. Rozas , P. D. Pérez , M. Sirena , S. Suárez , N. Haberkorn

Two-dimensional (2D) layered materials-based field-effect transistors (FETs) are promising for ultimate scaled electron device applications because of the improved electrostatics to atomically thin body thickness. However, compared with the…

应用物理 · 物理学 2019-10-02 Nan Fang , Kosuke Nagashio

Two-dimensional ferroelectric materials are beneficial for power-efficient memory devices and transistor applications. Here, we predict out-of-plane ferroelectricity in a new family of buckled metal oxide (MO; M: Ge, Sn, Pb) monolayers with…

应用物理 · 物理学 2024-10-28 Ateeb Naseer , Musaib Rafiq , Somnath Bhowmick , Amit Agarwal , Yogesh Singh Chauhan

This paper reports thermopower and conductivity measurements through the metal-insulator transition for 2-dimensional electron gases in high mobility Si-MOSFETs. At low temperatures both thermopower and conductivity show critical behaviour…

强关联电子 · 物理学 2009-11-07 R. Fletcher , V. M. Pudalov , A. D. B. Radcliffe , C. Possanzini

We present an experimental study of electron transport in inversion layers of high-mobility Si(001) samples with occupied excited subbands. The second series of oscillations, observed in addition to the main series of Shubnikov-de Hass…

介观与纳米尺度物理 · 物理学 2009-11-10 L. Smrcka , O. N. Makarovsky , S. G. Schemenchinskii , P. Vasek , V. Jurka

Recent experiments showed that thinning gallium, iron selenide and 2H tantalum disulfide to single/several monoatomic layer(s) enhances their superconducting critical temperatures. Here, we characterize these superconductors by extracting…

超导电性 · 物理学 2017-03-30 Evgeny Talantsev , Wayne Crump , Joshua Island , Ying Xing , Yi Sun , Jian Wang , Jeffery Tallon

In this work, the threshold voltage instability of normally-off p-GaN high electron mobility transistors (HEMTs) has been investigated by monitoring the gate current density during device on-state. The origin of the gate current variations…

The choice of electrostatic gating over the conventional chemical doping for phase engineering of quantum materials is attributed to the fact that the former can reversibly tune the carrier density without affecting the system's level of…

介观与纳米尺度物理 · 物理学 2021-05-25 Shashank Kumar Ojha , Sankalpa Hazra , Prithwijit Mandal , Ranjan Kumar Patel , Shivam Nigam , Siddharth Kumar , S. Middey

Studies of different experimental groups that explore the properties of a two-dimensional electron gas in silicon semiconductor systems ((100) Si metal-oxide-semiconductor field-effect transistors (MOSFETs) and (100) SiGe/Si/SiGe quantum…

强关联电子 · 物理学 2019-10-15 V. T. Dolgopolov

This paper investigates the kinetics of buffer trapping in GaN-based normally-off high-voltage transistors. The analysis was carried out on transfer-length method (TLM) structures. By means of a custom setup, (i) we investigated the…

应用物理 · 物理学 2021-12-21 A. Nardo , C. De Santi , C. Koller , C. Ostermaier , I. Daumiller , G. Meneghesso , E. Zanoni , M. Meneghini

We report that electricity can be generated from limitless thermal motion of ions by two dimensional (2D) surface of silicon wafer at room temperature. A typical silicon device, on which asymmetric electrodes with Au and Ag thin films were…

介观与纳米尺度物理 · 物理学 2013-10-22 Guo'an Tai , Zihan Xu

Two phenomena have been recently observed in high-mobility Si MOS structures: (1) strong enhancement of the metallic conduction at low temperatures, T < 2K, and (2) the scaling behavior of the temperature and electric field dependences of…

强关联电子 · 物理学 2008-02-03 V. M. Pudalov

We report experiment and theory on an ambipolar gate-controlled Si-vacuum field effect transistor (FET) where we study electron and hole (low-temperature 2D) transport in the same device simply by changing the external gate voltage to tune…

介观与纳米尺度物理 · 物理学 2015-08-04 Binhui Hu , M. M. Yazdanpanah , B. E. Kane , E. H. Hwang , S. Das Sarma

We report the successful buffer-gas cooling and magnetic trapping of chromium atoms with densities exceeding $10^{12}$ atoms per cm$^{3}$ at a temperature of 350 mK for the trapped sample. The possibilities to extend the method to…

We report on a healing of defects at room temperature in the organic semiconductor pentacene. This peculiar effect is a direct consequence of the weak intermolecular interaction which is characteristic of organic semiconductors. Pentacene…

材料科学 · 物理学 2009-12-21 Wolfgang L. Kalb , Fabian Meier , Kurt Mattenberger , Bertram Batlogg

Despite the concerted effort of several research groups, a detailed experimental account of defect dynamics in high-quality single- and few-layer transition metal dichalcogenides remain elusive. In this paper we report an experimental study…

介观与纳米尺度物理 · 物理学 2019-07-04 Suman Sarkar , K. Lakshmi Ganapathi , Sangeneni Mohan , Aveek Bid

Recent experimental advances highlight electron charge qubits floating above solid neon as an emerging promising platform for quantum computing, but the physical origin of single-electron lateral trapping is still not fully understood.…

量子物理 · 物理学 2025-10-14 Toshiaki Kanai , Chuanwei Zhang

It is very important to elucidate the mechanism of superconductivity for achieving room temperature superconductivity. This paper is a short review article on the mechanism of high-temperature superconductivity. In the first half of this…

强关联电子 · 物理学 2019-07-05 Takashi Yanagisawa

The heat transport in heavy-doped n-GaAs has been investigated at temperatures T=300 K and 77 K using the irradiation of the metal-semiconductor contact by modulated CO_{2}-laser radiation. It is shown this approach giving an opportunity to…

材料科学 · 物理学 2007-05-23 A. Ya. Shul'man , N. A. Mordovets , I. N. Kotel'nikov

We discuss the theory of cooling electrons in solid-state devices via ``evaporative emission.'' Our model is based on filtering electron subbands in a quantum-wire device. When incident electrons in a higher-energy subband scatter out of…

介观与纳米尺度物理 · 物理学 2007-05-23 Thushari Jayasekera , Kieran Mullen , Michael A. Morrison