225 research outputs found
Field-controlled quantum anomalous Hall effect in electron-doped CrSiTe monolayer: a first-principles prediction
We report Chern insulating phases emerging from a single layer of layered
chalcogenide CrSiTe, a transition metal trichacogenides (TMTC) material,
in the presence of charge doping. Due to strong hybridization with Te
orbitals, the spin-orbit coupling effect opens a finite band gap, leading to a
nontrivial topology of the Cr conduction band manifold with
higher Chern numbers. Our calculations show that quantum anomalous Hall effects
can be realized by adding one electron in a formula unit cell of
CrSiTe, equivalent to electron doping by
2.3610 cm carrier density. Furthermore, the
doping-induced anomalous Hall conductivity can be controlled by an external
magnetic field via spin-orientation-dependent tuning of the spin-orbit
coupling. In addition, we find distinct quantum anomalous Hall phases employing
tight-binding model analysis, suggesting that CrSiTe can be a fascinating
new platform to realize Chern insulating systems with higher Chern numbers.Comment: 9 pages, 8 figures, and additional supplementary informatio
SIMULATION RESULTS OF SELF SEEDING SCHEME IN PAL-XFEL
Abstract There are two major undulator lines in Pohang Accelerator Laboratory XFEL (PAL XFEL), soft X-ray and hard X-ray. For the hard X-ray undulator line, selfseeding is the most promising approach to supply narrow bandwidth radiation to the users. The electron energy at hard X-ray undulator is 10 GeV and the central wavelength is 0.1 nm. We plan to provide the self-seeding option in the Phase I operation of PAL-XFEL. In this talk, the simulation results for the self-seeding scheme of hard X-ray undulator line in PAL XFEL will be presented
Giant Cell Tumor of Soft Tissue: a Case with Atypical US and MRI Findings
We report the case of a giant cell tumor with diffuse interstitial hemorrhaging and unusually prominent cystic components in the soft tissue of the thigh which has not been reported previously. Magnetic resonance image (MRI), showed signal intensity typical of a giant cell tumor. However, because of its conspicuous large well-circumscribed cystic components, the differential diagnoses, based on the image findings from an ultrasonography (US) and MRI, were complicated epidermoid cyst, cystic change of a neurogenic tumor, and a parasitic cyst
Fibroblastic Type Osteosarcoma of the Ulna: a Case Report of a Tumor in a Rare Location with Atypical Imaging Findings
The ulna is a rare site of origin for osteosarcoma, and purely osteolytic osteosarcomas are uncommonly noted on conventional radiographs. We present a patient with a lytic lesion of the distal ulna for which imaging findings suggested an aneurysmal bone cyst. The lesion was histologically confirmed to be a fibroblastic osteosarcoma
MR Imaging Findings of a Primary Cardiac Osteosarcoma and Its Bone Metastasis with Histopathologic Correlation
An osteosarcoma of cardiac origin is extremely rare, and a comprehensive description of MR imaging (MRI) findings of cardiac osteosarcoma and its metastasis in the femur have not been reported in the literature. We present a case of cardiac osteosarcoma in a 47-year-old woman and its metastasis to the femur, focusing on the description of MRI findings of the cardiac and metastatic bony osteosarcoma with a histopathologic correlation
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