|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Atomically Smooth Ultrathin Films of Topological Insulator Sb_(2)Te_(3)显示文摘The growth and characterization of single-crystalline thin films of topological insulators(TIs)is an important step towards their possible applications.Using in situ scanning tunneling microscopy(STM)and angle-resolved photoemission spectroscopy(ARPES),we show that moderately thick Sb_(2)Te_(3)films grown layer-by-layer by molecular beam epitaxy(MBE)on Si(111)are atomically smooth,single-crystalline,and intrinsically insulating.Furthermore,these films were found to exhibit a robust TI electronic structure with their Fermi energy lying within the energy gap of the bulk that intersects only the Dirac cone of the surface states.Depositing Cs in situ moves the Fermi energy of the Sb_(2)Te_(3)films without changing the electronic band structure,as predicted by theory.We found that the TI behavior is preserved in Sb_(2)Te_(3)films down to five quintuple layers(QLs). | Guang Wang Xiegang Zhu Jing Wen Xi Chen Ke He Lili Wang Xucun Ma Ying Liu Xi Dai Zhong Fang Jinfeng Jia Qikun Xue | 2010 | Nano Research2010，3，12： | 5 |
| 2 | Observation of unconventional anomalous Hall effect in epitaxial CrTe thin films显示文摘 | Dapeng Zhao Liguo Zhang Iftikhar Ahmed Malik Menghan Liao Wenqiang Cui Xinqiang Cai Cheng Zheng Luxin Li Xiaopeng Hu Ding Zhang Jinxing Zhang Xi Chen Wanjun Jiang Qikun Xue | 2018 | Nano Research2018，11，6： | 3 |
| 3 | An Identity-Based Proxy Signature on NTRU Lattice显示文摘Proxy signature plays an important role in distributed systems, mobile agent applications, distributed shared object systems, global distribution networks and mobile communications etc., since it allows the original signer to delegate another proxy signer to sign the message instead of himself. However, the proxy signature schemes constructed on the number theory cannot resist quantum computers attack and depend on the public key infrastructure. To mitigate these problems, the alternative schemes are Identity-based proxy signature constructed on lattice.In this paper, an identity-based proxy signature scheme based on Number theorem research unit(NTRU) lattice is proposed and proven secure in the random oracle. Compared with the other existing identity-based proxy signature schemes, the proposed scheme outperforms them in terms of original signer's signature size and signing key size and proxy signer's signing key size. | ZHU Hongfei TAN Yu'an YU Xiao XUE Yuan ZHANG Qikun ZHU Liehuang LI Yuanzhang | 2018 | Chinese Journal of Electronics2018，27，2： | 3 |
| 4 | Superconductivity in One-atomic-layer Metal Films显示文摘Superconductivity is a peculiar quantum phenomenon which originates from the pairing of conduction electrons, followed by phase coherent condensation. Since the discovery by K. Onnes in 1911, superconductivity has been one of the hottest topics in physics for an entire century, and still attracts people's great interest. One of the intriguing issues is | ZHANG Tong CHENG Peng LI Wenjuan SUN Yujie WANG Guang ZHU Xiegang HE Ke WANG Lili MA Xucun CHEN Xi WANG Yayu LIU Ying LIN Haiqing JIA Jinfeng XUE Qikun | 2011 | Bulletin of the Chinese Academy of Sciences2011，25，4： | 1 |
| 5 | Magnetoresistance Oscillations of Ultrathin Pb Bridges显示文摘Pb nanobridges with a thickness of less than 10 nm and a width of several hundred nm have been fabricated from single-crystalline Pb fi lms using low-temperature molecular beam epitaxy and focus ion beam microfabrication techniques.We observed novel magnetoresistance oscillations below the superconducting transition temperature(TC)of the bridges.The oscillations which were not seen in the crystalline Pb fi lmsmay originate from the inhomogeneity of superconductivity induced by the applied magnetic fi elds on approaching the normal state,or the degradation of fi lm quality by thermal evolution. | Jian Wang Xucun Ma Shuaihua Ji Yun Qi Yingshuang Fu Aizi Jin Li Lu Changzhi Gu X.C.Xie Mingliang Tian Jinfeng Jia Qikun Xue | 2009 | Nano Research2009，2，9： | 1 |
| 6 | In situ Raman spectroscopy of topological insulator Bi2Te3 films with varying thickness显示文摘拓扑的绝缘体(TI ) 大批是有乐队差距的量物质的一个新状态,进行表面说。在这个工作,分子的横梁取向附生(MBE ) 准备的拓扑的绝缘体 Bi2Te3 电影的拉曼系列被测量了由一在里面 situ 超离频真空(UHV )-MBE-Raman 光谱学系统。Bi2Te3 的厚度什么时候拍摄,减少从 40 五倍层(QL ) 到 1 QL,光谱大批出现的一些拉曼模式的特征 Bi2Te3 变化并且一个新震动的模式出现,它没在以前的研究被报导并且可能与量尺寸效果并且对称碎有关。另外,当一个迪拉克锥形成了时,一个明显的变化在 3 QL 被观察。这些结果在 TI 的新奇的量状态附近为一些提供新信息。 | Chunxiao Wang Xiegang Zhu Louis Nilsson Jing Wen GuangWang Xinyan Shan Qing Zhang Shulin Zhang Jinfeng Jia Qikun Xue | 2013 | Nano Research2013，6，9： | 1 |
| 7 | Gate voltage control of helicity-dependent photocurrent and polarization detection in(Bi_(1-x)Sb_(x))_(2)Te_(3)topological insulator thin films显示文摘Optical helicity provides us with an effective means to control the helicity-dependent photocurrent in the spinmomentum-locked surface states of topological insulators(TIs).Also,the TIs show potential in polarization detection as an intrinsic solid-state optical chirality detector for easier integration and fabrication.However,the complex photoresponses with the circular photogalvanic effect,the linear photogalvanic effect,and the photon drag effect in the TIs prevent them from direct chirality detection of the elliptically polarized light.Here,by fitting with the theoretical models to the measured photocurrents,the microscopic origin of different components of the helicity-dependent photocurrent has been demonstrated.We show a comprehensive study of the helicitydependent photocurrent in(Bi_(1-x)Sb_(x))_(2)Te_(3)thin films of different thicknesses as a function of the light incident angle and the gate-tuned chemical potential.The observation of the light incident angle dependence of the helicitydependent photocurrent provides us with a polarization detection strategy using a TI thin film without the use of any additional optical elements,and the detection accuracy can be enhanced by gate tuning.Additionally,the Stokes parameters can be extracted by arithmetic operation of photocurrents measured with different incident angles and gating voltages for complete characterization of the polarization states of a light beam.Using this means,we realize the polarization detection and the Stokes parameters analysis with a single device.Our work provides an alternative solution to develop miniaturized intrinsic polarization-sensitive photodetectors. | SHENZHONG CHEN JINLING YU XIYU HONG KEJING ZHU YONGHAI CHEN SHUYING CHENG YUNFENG LAI KE HE QIKUN XUE | 2023 | Photonics Research2023，11，11： | 0 |
| 8 | Stripe-type charge ordering developed at the strong limit of nematicity in FeSe film显示文摘Subject Code:A04With the support by the National Natural Science Foundation of China,a collaborative study by the research groups led by Profs.Li Wei(李渭),Chen Xi(陈曦)and Xue Qikun(薛其坤)from Tsinghua University and Prof.Shen Zhixun(沈志勋)from Stanford University,demonstrates stripes developed | Li Wei (李渭) Chen Xi (陈曦) Xue Qikun (薛其坤) Shen Zhixun (沈志勋) | 2017 | Science Foundation in China2017，25，3： | 0 |
| 9 | National Science Review——A journal on Chinese and global scientific achievement显示文摘The National Science Review(NSR)proudly announces the publication of its inaugural issue.As China’s irst comprehensive science review journal published in English,NSR will link China’s rapidly advancing scientiic community with the frontiers of global science and technology for the beneit of the scientiic community worldwide. | Chunli Bai Mu-ming Poo Qikun Xue Song Gao Yigong Shi Zhonghe Zhou Max Lu Lei Guo | 2014 | National Science Review2014，1，1： | 0 |
| 10 | Nanoscale superconductivity of ?-Ga islands grown by molecular beam epitaxy显示文摘We report on the preparation and superconductivity of metastable γ-Ga islands on Si(111) substrate. The Ga grows in a typical Volmer-Weber mode at a low temperature of 110 K, resulting in formation of Ga nanoislands at various sizes with the identical γ-phase. In-situ low temperature scanning tunneling spectra reveal quantized electronic states in ultrathin Ga islands. It is found that both the lateral size and thickness of the Ga islands strongly suppress the superconductivity. Due to substantial surface energy contribution, the transition temperature Tc scales inversely with the island thickness and the minimum thickness for the occurrence of superconductivity is calculated to be two monolayers. | ZHANG HuiMin PENG JunPing GUAN JiaQi LI Zhi SONG CanLi WANG LiLi HE Ke MA XuCun XUE QiKun | 2015 | Science China(Physics,Mechanics & Astronomy)2015，58，10： | 0 |
| 11 | Pure-Blue Fluorescence Molecule for Nondoped Electroluminescence with External Quantum Efficiency Approaching 13%显示文摘A pure-blue light-emitting material is one of the key components in the preparation of organic lightemitting diode(OLED)displays.Although highefficiency blue OLEDs have been realized in thermally activated delayed fluorescence(TADF)materials,they need to be dispersed into suitable hostmaterials.Hence,exploring efficient nondoped,pure-blue luminous molecules is important. | Xianhao Lv Lei Xu Miao Cang Runze Wang Mizhen Sun Huayi Zhou Yuan Yu Qikun Sun Yuyu Pan Yuwei Xu Dehua Hu Shanfeng Xue Wenjun Yang | 2021 | CCS Chemistry2021，3，9： | 0 |
| 12 | Ambi-chiral anomalous Hall effect in magnetically doped topological insulators显示文摘The chirality associated with broken time-reversal symmetry in magnetically doped topological insulators has important implications for the quantum transport phenomena.Here we report anomalous Hall effect studies in Mn-and Cr-doped Bi_(2)Te_(3) topological insulators with varied thicknesses and doping contents.By tracing the magnitude of the anomalous Hall resistivity,we find that the Mn-type anomalous Hall effect characterized with clockwise chirality is strengthened by the reduction of film thickness,which is opposite to that of the Cr-type anomalous Hall effect with counterclockwise chirality.We provide a phenomenological physical picture to explain the evolution of the magnetic order and the anomalous Hall chirality in magnetically doped topological insulators. | Chang Liu YunYi Zang Yan Gong Ke He XuCun Ma QiKun Xue YaYu Wang | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员