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The introduction of spin-orbit interactions (SOIs) and the subsequent appearance of a two-dimensional (2D) topological phase are crucial for voltage-controlled and zero-emission energy spintronic devices. In contrast, graphene basically…

介观与纳米尺度物理 · 物理学 2019-04-05 T. Namba , K. Tamura , K. Hatsuda , T. Nakamura , C. Ohata , S. Katsumoto , J. Haruyama

We investigate the electronic dispersion and transport properties of graphene/WSe$_{2}$ heterostructures in the presence of a proximity induced spin-orbit coupling (SOC) using a low-energy Hamiltonian, with different types of symmetry…

介观与纳米尺度物理 · 物理学 2023-07-07 M. Zubair , P. Vasilopoulos , M. Tahir

Charge carriers in a graphene sheet, a single layer of graphite, exhibit much distinctive characteristics to those in other two-dimensional electronic systems because of their chiral nature. In this report, we focus on the observation of…

介观与纳米尺度物理 · 物理学 2012-05-28 Dong-Keun Ki , Dongchan Jeong , Jae-Hyun Choi , Kee-Su Park , Hu-Jong Lee

We study the spin-orbit interaction effects in a one-dimensional electron system that result from the image charges in a nearby metallic gate. The nontrivial property of the image-potential-induced spin-orbit interaction (iSOI) is that it…

强关联电子 · 物理学 2017-11-27 Yasha Gindikin , Vladimir A. Sablikov

The electron-phonon interaction and related transport properties are investigated in monolayer silicene and MoS2 by using a density functional theory calculation combined with a full-band Monte Carlo analysis. In the case of silicene, the…

介观与纳米尺度物理 · 物理学 2015-06-12 Xiaodong Li , Jeffrey T. Mullen , Zhenghe Jin , Kostyantyn M. Borysenko , M. Buongiorno Nardelli , Ki Wook Kim

Graphene has opened new avenues of research in quantum transport, with potential applications for coherent electronics. Coherent transport depends sensitively on scattering from microscopic disorder present in graphene samples: electron…

介观与纳米尺度物理 · 物理学 2015-05-18 Jesse Berezovsky , Robert M Westervelt

Carrier transport in gated 2D graphene monolayers is theoretically considered in the presence of scattering by random charged impurity centers with density $n_i$. Excellent quantitative agreement is obtained (for carrier density $n >…

介观与纳米尺度物理 · 物理学 2007-10-09 E. H. Hwang , S. Adam , S. Das Sarma

We study electron transport properties of a monoatomic graphite layer (graphene) with different types of disorder. We show that the transport properties of the system depend strongly on the character of disorder. Away from half filling, the…

介观与纳米尺度物理 · 物理学 2007-05-23 P. M. Ostrovsky , I. V. Gornyi , A. D. Mirlin

Irradiation of graphene on SiO2 by 500 eV Ne and He ions creates defects that cause intervalley scattering as evident from a significant Raman D band intensity. The defect scattering gives a conductivity proportional to charge carrier…

材料科学 · 物理学 2009-06-12 Jian-Hao Chen , W. G. Cullen , C. Jang , M. S. Fuhrer , E. D. Williams

Graphene sandwiched between semiconducting monolayers of ferromagnet Cr$_2$Ge$_2$Te$_6$ and transition-metal dichalcogenide WS$_2$ acquires both spin-orbit (SO), of valley-Zeeman and Rashba types, and exchange couplings. Using…

介观与纳米尺度物理 · 物理学 2020-10-14 Klaus Zollner , Marko D. Petrovic , Kapildeb Dolui , Petr Plechac , Branislav K. Nikolic , Jaroslav Fabian

Real-world samples of graphene often exhibit various types of out-of-plane disorder -- ripples, wrinkles and folds -- introduced at the stage of growth and transfer processes. These complex out-of-plane defects resulting from the interplay…

介观与纳米尺度物理 · 物理学 2024-08-30 Yifei Guan , Oleg V. Yazyev

Graphene quantum dots are promising candidates for qubits due to weak spin-orbit and hyperfine interactions. The hyperfine interaction, controllable via isotopic purification, could be the key to further improving the coherence. Here, we…

Inelastic phonon scattering in graphene field-effect transistors (FETs) is studied by numerically solving the Boltzmann transport equation in three dimensional real and phase spaces (x, kx, ky). A kink behavior due to ambipolar transport…

介观与纳米尺度物理 · 物理学 2015-05-27 Jyotsna Chauhan , Jing Guo

Strong spin-orbit interaction (SOI) in graphene grown on tungsten disulfide (WS2) has been recently observed, leading to energy gap opening by SOI. Energy gap in graphene may also be induced by sublattice symmetry breaking (SSB) where…

介观与纳米尺度物理 · 物理学 2016-02-15 Kitakorn Jatiyanon , Bumned Soodchomshom

We performed infrared transmission experiment on ion-gel gated graphene and measured carrier scattering rate g as function of carrier density n over wide range up to n=2E13 cm-2. The g exhibits a rapid decreases along with the gating…

介观与纳米尺度物理 · 物理学 2019-11-11 Kwangnam Yu , Jiwon Jeon , Jiho Kim , Chang Won Oh , Yongseok Yoon , Beom Joon Kim , Jeong Ho Cho , E. J. Choi

We study graphene which has both spin-orbit coupling (SOC), taken to be of the Kane-Mele form, and a Zeeman field induced due to proximity to a ferromagnetic material. We show that a zigzag interface of graphene having SOC with its pristine…

介观与纳米尺度物理 · 物理学 2016-02-17 Ranjani Seshadri , K. Sengupta , Diptiman Sen

We demonstrate theoretically that most of the observed transport properties of graphene sheets at zero magnetic field can be explained by scattering from charged impurities. We find that, contrary to common perception, these properties are…

介观与纳米尺度物理 · 物理学 2008-01-14 Shaffique Adam , E. H. Hwang , Victor Galitski , S. Das Sarma

Van der Waals interactions with transition metal dichalcogenides was shown to induce strong spin-orbit coupling (SOC) in graphene, offering great promises to combine large experimental flexibility of graphene with unique tuning capabilities…

介观与纳米尺度物理 · 物理学 2023-10-03 Qing Rao , Wun-Hao Kang , Hongxia Xue , Ziqing Ye , Xuemeng Feng , Kenji Watanabe , Takashi Taniguchi , Ning Wang , Ming-Hao Liu , Dong-Keun Ki

Graphitic nitrogen-doped graphene is an excellent platform to study scattering processes of massless Dirac fermions by charged impurities, in which high mobility can be preserved due to the absence of lattice defects through direct…

介观与纳米尺度物理 · 物理学 2017-06-05 Jiayu Li , Li Lin , Dingran Rui , Qiucheng Li , Jincan Zhang , Ning Kang , Yanfeng Zhang , Hailin Peng , Zhongfan Liu , H. Q. Xu

We investigate the spin diffusion and transport in a graphene monolayer on SiO$_2$ substrate by means of the microscopic kinetic spin Bloch equation approach. The substrate causes a strong Rashba spin-orbit coupling field $\sim 0.15$ meV,…

介观与纳米尺度物理 · 物理学 2011-07-07 P. Zhang , M. W. Wu