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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…

Materials Science · Physics 2009-12-21 Wolfgang L. Kalb , Fabian Meier , Kurt Mattenberger , Bertram Batlogg

We fabricated a large number of single and bilayer graphene transistors and carried out a systematic experimental study of their low-frequency noise characteristics. A special attention was given to determining the dominant noise sources in…

Materials Science · Physics 2015-05-19 S. Rumyantsev , G. Liu , W. Stillman , M. Shur , A. A. Balandin

Fundamental physical properties limiting the performance of spin field effect transistors are compared to those of ordinary (charge-based) field effect transistors. Instead of raising and lowering a barrier to current flow these spin…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Kimberley C. Hall , Michael E. Flatté

Measurements of magnetization, specific heat, electrical resistivity, Hall effect, and magnetoresistance on single crystalline samples of LaFeAsO grown in a NaAs flux are reported. While this material is known to be a semimetal, the…

Superconductivity · Physics 2015-06-16 C. A. McElroy , J. J. Hamlin , B. D. White , M. A. McGuire , B. C. Sales , M. B. Maple

We demonstrate top-gated field effect transistor made of reduced graphene oxide (RGO) monolayer (graphene) by dielectrophoresis. Raman spectrum of RGO flakes of typical size of 5{\mu}m x 5{\mu}m show a single 2D band at 2687 cm-1,…

Mesoscale and Nanoscale Physics · Physics 2015-05-19 K. S. Vasu , Biswanath Chakraborty , S. Sampath , A. K. Sood

We present the first thermoelectric measurements on pentacene field effect transistors. We report high values of the Seebeck coefficient at room temperature between 240 and 500 micro V/K depending on the dielectric surface treatment. These…

We propose a practical realization of a field-effect transistor for phonons. Our device is based on a single ionic polymeric molecule and it gives modulations as large as -25% in the thermal conductance for feasible temperatures and…

Mesoscale and Nanoscale Physics · Physics 2010-06-30 Marcos G. Menezes , Aldilene Saraiva-Souza , Jordan Del Nero , Rodrigo B. Capaz

Resistivity measurements were performed on Pr$_{1-x}$La$_x$Os$_4$Sb$_{12}$ single crystals at temperatures down to 20 mK and in fields up to 18 T. The results for dilute-Pr samples ($x=0.3$ and 0.67) are consistent with model calculations…

Superconductivity · Physics 2009-11-11 C. R. Rotundu , K. Ingersent , B. Andraka

The magnetic and magnetotransport properties of metallic 1$T$-VTe$_{2}$ single crystals were investigated at temperatures from 1.3 to 300 K and in magnetic fields up to 35 T. Upon applying a high magnetic field, it is found that the…

Strongly Correlated Electrons · Physics 2021-03-09 Xiaxin Ding , Jie Xing , Gang Li , Luis Balicas , Krzysztof Gofryk , Hai-Hu Wen

We investigate the design of steep-slope metal-oxide-semiconductor field-effect transistors (MOSFETs) exploiting monolayers of transition metal dihalides as channel materials. With respect to other previously proposed steep-slope…

Mesoscale and Nanoscale Physics · Physics 2021-06-24 Demetrio Logoteta , Jiang Cao , Marco Pala , Paolo Marconcini , Giuseppe Iannaccone

High transition temperature (high-Tc) superconductivity is associated with layered crystal structures. This work considers superconductivity in ultra-thin crystals (of thickness equal to the transverse structural periodicity distance d for…

Superconductivity · Physics 2012-02-03 Dale R. Harshman , Anthony T. Fiory

An antiferromagnetic transition is observed in single crystal EuRh2As2 at a high temperature T_N = 47 K compared to the ferromagnetic Weiss temperature theta = 12 K. We show that this is, surprisingly, consistent with mean field theory. A…

Strongly Correlated Electrons · Physics 2010-11-12 Yogesh Singh , Y. Lee , B. N. Harmon , D. C. Johnston

The weak temperature dependence of the resistance R(T) of monolayer graphene1-3 indicates an extraordinarily high intrinsic mobility of the charge carriers. Important complications are the presence of mobile scattering centres that strongly…

Materials Science · Physics 2010-01-18 Viera Skakalova , Alan B. Kaiser , Jai Seung Yoo , Dirk Obergfell , Siegmar Roth

We have fabricated and measured ballistic graphene transistors with two oblique gates that can be independently biased. The gate lengths are about 38 nm and are separated by a distance of 30 nm, the tilting angle being of 45o with respect…

Mesoscale and Nanoscale Physics · Physics 2016-07-27 Mircea Dragoman , Adrian Dinescu , Daniela Dragoman

Graphene field effect transistors commonly comprise graphene flakes lying on SiO2 surfaces. The gate-voltage dependent conductance shows hysteresis depending on the gate sweeping rate/range. It is shown here that the transistors exhibit two…

Mesoscale and Nanoscale Physics · Physics 2011-01-19 Haomin Wang , Yihong Wu , Chunxiao Cong , Jingzhi Shang , Ting Yu

We perform a combined experimental and theoretical study of tetramethyltetraselenafulvalene (TMTSF) single-crystal field-effect transistors, whose electrical characteristics exhibit clear signatures of the intrinsic transport properties of…

Materials Science · Physics 2009-07-14 H. Xie , H. Alves , A. F. Morpurgo

The ability to control electronic properties of a material by externally applied voltage is at the heart of modern electronics. In many cases, it is the so-called electric field effect that allows one to vary the carrier concentration in a…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 K. S. Novoselov , A. K. Geim , S. V. Morozov , S. V. Dubonos , Y. Zhang , D. Jiang

Single crystals of BaFe$_2$As$_2$ and (Ba$_{0.55}$K$_{0.45}$)Fe$_2$As$_2$ have been grown out of excess Sn with 1% or less incorporation of solvent. The crystals are exceptionally micaceous, are easily exfoliated and can have dimensions as…

2-Dimensional (2D) CrPS4 single crystals have been grown by the chemical vapor transport method. The crystallographic, magnetic, electronic and thermal transport properties of the single crystals were investigated by the room-temperature…

Strongly Correlated Electrons · Physics 2016-03-09 Q. L. Pei , X. Luo , G. T. Lin , J. Y. Song , L. Hu , Y. M. Zou , L. Yu , W. Tong , W. H. Song , W. J. Lu , Y. P. Sun

We report on an infrared spectroscopy study of mobile holes in the accumulation layer of organic field-effect transistors based on rubrene single crystals. Our data indicate that both transport and infrared properties of these transistors…

Materials Science · Physics 2009-11-13 Z. Q. Li , V. Podzorov , N. Sai , M. C. Martin , M. E. Gershenson , M. Di Ventra , D. N. Basov