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New classes two-dimensional (2D) materials beyond graphene, including layered and non-layered, and their heterostructures, are currently attracting increasing interest due to their promising applications in nanoelectronics, optoelectronics…

Computational Physics · Physics 2016-06-22 Guangzhao Qin , Zhenzhen Qin , Wu-Zhang Fang , Li-Chuan Zhang , Sheng-Ying Yue , Qing-Bo Yan , Ming Hu , Gang Su

The origin of the phonon thermal Hall effect in insulators is a matter of ongoing debate. The large amplitude of the signal in an elemental non-magnetic solid, such as black phosphorus (BP), calls for a minimal mechanism not invoking the…

Strongly Correlated Electrons · Physics 2025-05-09 Xiaokang Li , Xiaodong Guo , Zengwei Zhu , Kamran Behnia

Topological semimetals have revealed a wide array of novel transport phenomena, including electron hydrodynamics, quantum field theoretic anomalies, and extreme magnetoresistances and mobilities. However, the scattering mechanisms central…

Layered halide perovskites have emerged as potential alternatives to three-dimensional halide perovskites due to their improved stability and larger material phase space, allowing fine-tuning of structural, electronic, and optical…

The electronic and phonon transport properties of graphene-like boron phosphide (BP), boron arsenide (BAs), and boron antimonide (BSb) monolayers are investigated using first-principles calculations and Boltzmann theory. By considering both…

Materials Science · Physics 2019-07-24 Z. Z. Zhou , H. J. Liu , D. D. Fan , G. H. Cao

Atomically thin black phosphorus (BP) field-effect transistors show strong-weak localization transition which is tunable through gate voltages. Hopping transports through charge impurity induced localized states are measured at low-carrier…

Mesoscale and Nanoscale Physics · Physics 2017-11-22 Gen Long , Shuigang Xu , Xiangbin Cai , Zefei Wu , Tianyi Han , Jiangxiazi Lin , Yuanwei Wang , Liheng An , Yuan Cai , Xinran Wang , Ning Wang

Employing flux-grown single crystal WSe$_2$, we report charge carrier scattering behaviors measured in $h$-BN encapsulated monolayer field effect transistors. We perform quantum transport measurements across various hole densities and…

Anisotropy describes the directional dependence of a material's properties such as transport and optical response. In conventional bulk materials, anisotropy is intrinsically related to the crystal structure, and thus not tunable by the…

Materials Science · Physics 2017-02-10 Ting Cao , Zhenglu Li , Diana Y. Qiu , Steven G. Louie

Graphynes, a class of two-dimensional carbon allotropes, exhibit exceptional electronic properties, similar to graphene, but with intrinsic band gaps, making them promising for semiconducting applications. The incorporation of acetylene…

Materials Science · Physics 2025-05-28 Elif Unsal , Alessandro Pecchia , Alexander Croy , Gianaurelio Cuniberti

We compute the thermal conductivity of monolayer beryllene using the linearized phonon Boltzmann transport equation with interatomic force constants obtained from \textit{ab-initio} calculations. Monolayer beryllene exhibits an impressive…

Materials Science · Physics 2024-09-10 Sapta Sindhu Paul Chowdhury , Santosh Mogurampelly

We present an \emph{ab-initio} study that identifies the main electron-phonon scattering channels in $n$-type PbTe. We develop an electronic transport model based on the Boltzmann transport equation within the transport relaxation time…

Mesoscale and Nanoscale Physics · Physics 2018-11-14 Jiang Cao , Jose D. Querales-Flores , Aoife R. Murphy , Stephen Fahy , Ivana Savić

Photogenerated carrier transport and recombination in metal halide perovskites are critical to device performance. Despite considerable efforts, sample quality issues and measurement techniques have limited the access to their intrinsic…

In this letter, we theoretically study the electron mobility in few-layer MoxW1-xS2 as limited by various scattering mechanisms. The room temperature energy-dependent scattering times corresponding to polar longitudinal optical (LO) phonon,…

Mesoscale and Nanoscale Physics · Physics 2015-09-15 Hareesh Chandrasekar , Digbijoy Neelim Nath

Compounds from groups IV and V have been the focus of recent research due to their impressive physical characteristics and structural stability. In this study, the MX monolayers (M=Sn, Pb; N=P, As) are investigated with first-principles…

Materials Science · Physics 2024-03-12 Bo Zhang , Wenhui Wan , Yong Liu , Yanfeng Ge

We report analytic results on quantum capacitance (C$_{q}$) measurements and their optical tuning in dual-gated device with potassium-doped multi-layered black phosphorous (BP) as the channel material. The two-dimensional (2D) layered BP is…

Materials Science · Physics 2017-08-09 Parijat Sengupta , Shaloo Rakheja

We report on the temperature dependence of the mobility, $\mu$, of the two-dimensional electron gas in a variable density AlGaN/GaN field effect transistor, with carrier densities ranging from 0.4$\times10^{12}$ cm$^{-2}$ to…

Black phosphorus (BP) offers considerable promise for infrared and visible photonics. Efficient tuning of the bandgap and higher subbands in BP by modulation of the Fermi level or application of vertical electric fields has been previously…

We combine femtosecond electron diffuse scattering experiments and first-principles calculations of the coupled electron-phonon dynamics to provide a detailed momentum-resolved picture of the ultrafast lattice thermalization in a thin film…

We study the effects of charged impurity scattering on the electronic transport properties of <110>-oriented Si nanowires in a gate-all-around geometry, where the impurity potential is screened by the gate, gate oxide and conduction band…

Mesoscale and Nanoscale Physics · Physics 2011-06-07 Martin P. Persson , Hector Mera , Yann-Michel Niquet , Christophe Delerue , Mamadou Diarra

A theory of charge transport in semiconductors in the presence of basal stacking faults is developed. It is shown that the presence of basal stacking faults leads to anisotropy in carrier transport. The theory is applied to carrier…

Mesoscale and Nanoscale Physics · Physics 2011-01-18 Aniruddha Konar , Tian Fang , Nan Sun , Debdeep Jena
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