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| 1 | CONVERGENT PROBLEM OF ITERATIVE SEQUENCES FOR NONLINEAR MAPPINGS WITH ERROR MEMBERS IN BANACH SPACES显示文摘In this paper,the approximation problems of Ishikawa iteration with errors of fixed points for asymptotically nonexpansive mappings and asymptotically pseudocontractive mappings in arbitrary real Banach spaces are investigated.Some necessary condition and sufficient condition for the convergence of iterative sequences are given respectively.The results thus extend and improve some recent corresponding results. | SunZhaohong NiYongqin HeChang | 2004 | Applied Mathematics(A Journal of Chinese Universities)2004，19，1： | 5 |
| 2 | Increased Expression of Toll-Like Receptor 2 in Rat Diabetic Nephropathy显示文摘 | Li Fanglin Yang Niansheng Zhang Lili Tan Hechang Huang Bin Liang Yingjie Chen Miaoyan Yu Xueqing | 2010 | American Journal of Nephrology2010，，2： | 1 |
| 3 | Local structure study of Fe dopants in Ni–deficit Ni 3 Al alloys显示文摘 | V.N. Ivanovski A. Umi?evi? J. Belo?evi?–?avor Hechang Lei Lijun Li B. Ceki? V. Koteski C. Petrovic | 2015 | Journal of Alloys and Compounds2015，，： | 1 |
| 4 | Preparation of SrMoO4 thin films on Si substrates by chemical soluntion deposition显示文摘 | Hechang Lei Xuebin Zhu Yuping Sun Wenhai Song | 2008 | Journal of Crystal Growth2008，310，： | 1 |
| 5 | Growth of Ca3Co4O9 films: simple chemical solution deposition and stress induced spontaneous dewetting显示文摘 | Zhu Xuebin Sun Yuping Lei Hechang | 2007 | Journal of Applied Physics2007，，： | 1 |
| 6 | Growth of Ca3Co4O9 films simple chemical solution deposition and stress induced spontaneous dewetting显示文摘 | Zhu Xuebin Sun Yuping Lei Hechang | 2007 | Journal ofAppliedPhysics2007，1，1： | 1 |
| 7 | Large magnetocaloric effect in van der Waals crystal CrBr3显示文摘We study the magnetocaloric effect (MCE) in van der Waals (vdW) crystal CrBr3.Bulk CrBr3 exhibits a second-order paramagnetic-ferromagnetic phase transition with TC =33 K.The maximum magnetic entropy change-△SM near TC is about 7.2 J.kg-1.K-1 with the maximum adiabatic temperature change △Tadmax =2.37 K and the relative cooling power RCP =191.5 J.kg-1 at μoH =5 T,all of which are remarkably larger than those in CrI3.These results suggest that the vdW crystal CrBr3 is a promising candidate for the low-dimensional magnetic refrigeration in low temperature region. | Xiaoyun Yu Xiao Zhang Qi Shi Shangjie Tian Hechang Lei Kun Xu Hideo Hosono | 2019 | Frontiers of physics2019，14，4： | 1 |
| 8 | Magnetoresistance anomaly in Fe_(5)GeTe_(2)homo-junctions induced by its intrinsic transition显示文摘Two-dimensional van der Waals(2D vdW)magnets have attracted great attention recently and possess the unprecedented advantages of incorporating high-quality vdW heterostructures and homostructures into spintronic devices,and exploring various physical phenomena or technologies.Among them,Fe_(5)GeTe_(2)(F5GT)has ferromagnetic order close to room temperature,however the magnetic properties near its intrinsic transitions and F5GT-based 2D devices remain mostly unexplored.Here,we systematically demonstrate the peculiar magnetic properties of Fe_(5)GeTe_(2)nanoflakes near its intrinsic transition temperature(Tp)which is far lower than its Curie temperature(TC)of~265 K,and firstly discover anomalous magnetoresistance effect in F5GT homo-junctions by magneto-transport measurements.The strongest anomalous Hall effect occurs around Tp which is located in a temperature range from 130 to 160 K for the F5GT nanoflakes with different thicknesses.Furthermore,negative magnetoresistance(N-MR)and butterfly-shaped magnetoresistance(B-MR)are observed in F5GT homo-junction devices,and they appeared only in an intermediate temperature range from 110 to 160 K,noticeably showing the maxima near the T_(p)rather than the lowest temperature.Our experimental results clearly reveal the significant influence of intrinsic transitions on magnetic properties of F5GT and magnetoresistance effect in F5GT homo-junction devices,which imply a new strategy to achieve highperformance 2D spintronic devices by tuning intrinsic magnetic or structural transitions in 2D vdW magnets. | Ruijie Zhao Yanfei Wu Shaohua Yan Xinjie Liu He Huang Yang Gao Mengyuan Zhu Jianxin Shen Shipeng Shen Weifeng Xu Zeyu Zhang Liyuan Zhang Jingyan Zhang Xinqi Zheng Hechang Lei Ying Zhang Shouguo Wang | 2023 | Nano Research2023，16，7： | 0 |
| 9 | Distinct superconducting behaviors of pressurized WB2 and ReB2 with different local B layers显示文摘The recent discovery of superconductivity up to 32 K in the pressurized MoBreignites the interest in exploring high-Tc superconductors in transition-metal diborides. Inspired by that work, we turn our attention to the 5 d transition-metal diborides.Here we systematically investigate the responses of both structural and physical properties of WBand ReBto external pressure,which possess different types of boron layers. Similar to MoB, the pressure-induced superconductivity was also observed in WBabove 60 GPa with a maximum Tcof 15 K at 100 GPa, while no superconductivity was detected in ReBin this pressure range. Interestingly, the structures at ambient pressure for both WBand ReBpersist to high pressure without structural phase transitions. Theoretical calculations suggest that the ratio of flat boron layers in this class of transition-metal diborides may be crucial for the appearance of high Tc. The combined theoretical and experimental results highlight the effect of the geometry of boron layers on superconductivity and shed light on the exploration of novel high-Tcsuperconductors in borides. | Cuiying Pei Jianfeng Zhang Chunsheng Gong Qi Wang Lingling Gao Yi Zhao Shangjie Tian Weizheng Cao Changhua Li Zhong-Yi Lu Hechang Lei Kai Liu Yanpeng Qi | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，8： | 0 |
| 10 | Consecutive topological transitions of helical Fermi arcs at saddle points in CoSi显示文摘The CoSi family hosts unconventional topological nodes with nonzero Chern numbers.The nontrivial topology is manifested by conspicuous surface Fermi arcs connecting surface projections of the nodes.Here,using angle-resolved photoemission spectroscopy,we have systematically investigated the(001)surface states of pristine and Ni-doped Co Si.The surface states form saddle-like band structures at/near the time-reversal invariant point near the Fermi level.The Fermi arcs undergo consecutive Lifshitz transitions at the saddle points X,leading to changes of the Fermi arc configuration.As the density of states has a van Hove singularity at the saddle points,exotic many-body physical phenomena may emerge accompanied by the topological transitions of surface Fermi arcs. | Zhicheng Rao Shangjie Tian Shunye Gao Quanxin Hu Wenhui Fan Jierui Huang Cenyao Tang Yaobo Huang Hechang Lei Yujie Sun Tian Qian Hong Ding | 2022 | Science China(Physics,Mechanics & Astronomy)2022，65，5： | 0 |
| 11 | Physical prope rties of qua ternary compounds Gd2CoAl4T2 (T = Si, Ge) single crystals显示文摘We have synthesized and investigated physical properties of two new quaternary compounds Gd2CoAl4T2 (T = Si, Ge) single crystals, which are isostructural to Tb2NiAl4Ge2 and Er2CoAl4Ge2. The most important structural feature of these materials is the anti-CaF2-type CoAl4T2 slabs. These materials show metallic behavior below 300 K and there is a long-range antiferromagnetic (AFM) transition appearing at 20 and 27 K for GdCoAl4Ge2 and Gd2CoAl4Si2, respectively. Resistivity and heat capacity measurements also confirm these bulk AFM transitions. Further analysis indicates that this long-range antiferromagnetism should result from the magnetic interaction between local moments of Gd^3+ ions. | Kaijian Huang Yuanshuai Sun Shanshan Sun Xiao Zhang Hechang Lei | 2019 | Frontiers of physics2019，14，2： | 0 |
| 12 | Pressure-induced superconductivity at 32 K in MoB_(2)显示文摘Since the discovery of superconductivity in MgB_(2)(T_(c)~39 K),the search for superconductivity in related materials with similar structures or ingredients has never stopped.Although about 100 binary borides have been explored,only a few of them show superconductivity with relatively low T_(c).In this work,we report the discovery of superconductivity up to 32 K,which is the highest T_(c)in transition-metal borides,in MoB_(2)under pressure.The T_(c)of MoB_(2)in theαphase can be well explained by theoretical calculations in the framework of electron-phonon coupling.Furthermore,the coupling between the d electrons of Mo and the out-of-plane Mo-phonon modes are the main driving force of the 32 K superconductivity of MoB_(2).Our study sheds light on the exploration of high-T_(c)superconductors in transition metal borides. | Cuiying Pei Jianfeng Zhang Qi Wang Yi Zhao Lingling Gao Chunsheng Gong Shangjie Tian Ruitao Luo Mingtao Li Wenge Yang Zhong-Yi Lu Hechang Lei Kai Liu Yanpeng Qi | 2023 | National Science Review2023，10，5： | 0 |
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