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Transparent ferroelectric crystals with ultrahigh piezoelectricity 期刊论文
NATURE, 2020, 577 (7790) : 350-+
作者:  Qiu, Chaorui;  Wang, Bo;  Zhang, Nan;  Zhang, Shujun;  Liu, Jinfeng;  Walker, David;  Wang, Yu;  Tian, Hao;  Shrout, Thomas R.;  Xu, Zhuo;  Chen, Long-Qing;  Li, Fei
收藏  |  浏览/下载:16/0  |  提交时间:2020/07/03

Transparent piezoelectrics are highly desirable for numerous hybrid ultrasound-optical devices ranging from photoacoustic imaging transducers to transparent actuators for haptic applications(1-7). However, it is challenging to achieve high piezoelectricity and perfect transparency simultaneously because most high-performance piezoelectrics are ferroelectrics that contain high-density light-scattering domain walls. Here, through a combination of phase-field simulations and experiments, we demonstrate a relatively simple method of using an alternating-current electric field to engineer the domain structures of originally opaque rhombohedral Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PMN-PT) crystals to simultaneously generate near-perfect transparency, an ultrahigh piezoelectric coefficient d(33) (greater than 2,100 picocoulombs per newton), an excellent electromechanical coupling factor k(33) (about 94 per cent) and a large electro-optical coefficient gamma(33) (approximately 220 picometres per volt), which is far beyond the performance of the commonly used transparent ferroelectric crystal LiNbO3. We find that increasing the domain size leads to a higher d(33) value for the [001]-oriented rhombohedral PMN-PT crystals, challenging the conventional wisdom that decreasing the domain size always results in higher piezoelectricity(8-10). This work presents a paradigm for achieving high transparency and piezoelectricity by ferroelectric domain engineering, and we expect the transparent ferroelectric crystals reported here to provide a route to a wide range of hybrid device applications, such as medical imaging, self-energy-harvesting touch screens and invisible robotic devices.


  
Nanoplasma-enabled picosecond switches for ultrafast electronics (vol 579, pg 534, 2020) 期刊论文
NATURE, 2020, 580 (7803) : E8-E8
作者:  Li, Jing;  Xu, Chuanliang;  Lee, Hyung Joo;  Ren, Shancheng;  Zi, Xiaoyuan;  Zhang, Zhiming;  Wang, Haifeng;  Yu, Yongwei;  Yang, Chenghua;  Gao, Xiaofeng;  Hou, Jianguo;  Wang, Linhui;  Yang, Bo;  Yang, Qing;  Ye, Huamao;  Zhou, Tie;  Lu, Xin;  Wang, Yan;  Qu, Min;  Yang, Qingsong;  Zhang, Wenhui;  Shah, Nakul M.;  Pehrsson, Erica C.;  Wang, Shuo;  Wang, Zengjun;  Jiang, Jun;  Zhu, Yan;  Chen, Rui;  Chen, Huan;  Zhu, Feng;  Lian, Bijun;  Li, Xiaoyun;  Zhang, Yun;  Wang, Chao;  Wang, Yue;  Xiao, Guangan;  Jiang, Junfeng;  Yang, Yue;  Liang, Chaozhao;  Hou, Jianquan;  Han, Conghui;  Chen, Ming;  Jiang, Ning;  Zhang, Dahong;  Wu, Song;  Yang, Jinjian;  Wang, Tao;  Chen, Yongliang;  Cai, Jiantong;  Yang, Wenzeng;  Xu, Jun;  Wang, Shaogang;  Gao, Xu;  Wang, Ting;  Sun, Yinghao
收藏  |  浏览/下载:25/0  |  提交时间:2020/07/03
Nagaoka ferromagnetism observed in a quantum dot plaquette 期刊论文
NATURE, 2020, 579 (7800) : 528-533
作者:  Yu, Yong;  Ma, Fei;  Luo, Xi-Yu;  Jing, Bo;  Sun, Peng-Fei;  Fang, Ren-Zhou;  Yang, Chao-Wei;  Liu, Hui;  Zheng, Ming-Yang;  Xie, Xiu-Ping;  Zhang, Wei-Jun;  You, Li-Xing;  Wang, Zhen;  Chen, Teng-Yun;  Zhang, Qiang;  Bao, Xiao-Hui;  Pan, Jian-Wei
收藏  |  浏览/下载:31/0  |  提交时间:2020/07/03

A quantum dot device designed to host four electrons is used to demonstrate Nagaoka ferromagnetism-a model of itinerant magnetism that has so far been limited to theoretical investigation.


Engineered, highly controllable quantum systems are promising simulators of emergent physics beyond the simulation capabilities of classical computers(1). An important problem in many-body physics is itinerant magnetism, which originates purely from long-range interactions of free electrons and whose existence in real systems has been debated for decades(2,3). Here we use a quantum simulator consisting of a four-electron-site square plaquette of quantum dots(4) to demonstrate Nagaoka ferromagnetism(5). This form of itinerant magnetism has been rigorously studied theoretically(6-9) but has remained unattainable in experiments. We load the plaquette with three electrons and demonstrate the predicted emergence of spontaneous ferromagnetic correlations through pairwise measurements of spin. We find that the ferromagnetic ground state is remarkably robust to engineered disorder in the on-site potentials and we can induce a transition to the low-spin state by changing the plaquette topology to an open chain. This demonstration of Nagaoka ferromagnetism highlights that quantum simulators can be used to study physical phenomena that have not yet been observed in any experimental system. The work also constitutes an important step towards large-scale quantum dot simulators of correlated electron systems.


  
PIK3CA variants selectively initiate brain hyperactivity during gliomagenesis 期刊论文
NATURE, 2020, 578 (7793) : 166-+
作者:  Qiu, Chaorui;  Wang, Bo;  Zhang, Nan;  Zhang, Shujun;  Liu, Jinfeng;  Walker, David;  Wang, Yu;  Tian, Hao;  Shrout, Thomas R.;  Xu, Zhuo;  Chen, Long-Qing;  Li, Fei
收藏  |  浏览/下载:8/0  |  提交时间:2020/07/03

Glioblastoma is a universally lethal form of brain cancer that exhibits an array of pathophysiological phenotypes, many of which are mediated by interactions with the neuronal microenvironment(1,2). Recent studies have shown that increases in neuronal activity have an important role in the proliferation and progression of glioblastoma(3,4). Whether there is reciprocal crosstalk between glioblastoma and neurons remains poorly defined, as the mechanisms that underlie how these tumours remodel the neuronal milieu towards increased activity are unknown. Here, using a native mouse model of glioblastoma, we develop a high-throughput in vivo screening platform and discover several driver variants of PIK3CA. We show that tumours driven by these variants have divergent molecular properties that manifest in selective initiation of brain hyperexcitability and remodelling of the synaptic constituency. Furthermore, secreted members of the glypican (GPC) family are selectively expressed in these tumours, and GPC3 drives gliomagenesis and hyperexcitability. Together, our studies illustrate the importance of functionally interrogating diverse tumour phenotypes driven by individual, yet related, variants and reveal how glioblastoma alters the neuronal microenvironment.


Glioblastoma tumours expressing oncogenic PIK3CA variants secrete the glycan GPC3, which promotes the formation of neural synapses, brain synaptic hyperexcitability and gliomagenesis.


  
Dugongs under threat 期刊论文
SCIENCE, 2019, 365 (6453) : 552-552
作者:  Li, Bo;  Huang, Danlian;  Zeng, Guangming;  Cheng, Min;  Lai, Cui;  Zhang, Chen;  Xu, Piao;  Xue, Wenjing;  Hu, Xiaohong
收藏  |  浏览/下载:12/0  |  提交时间:2019/11/27
Weakened growth of cropland-N2O emissions in China associated with nationwide policy interventions 期刊论文
GLOBAL CHANGE BIOLOGY, 2019, 25 (11) : 3706-3719
作者:  Shang, Ziyin;  Zhou, Feng;  Smith, Pete;  Saikawa, Eri;  Ciais, Philippe;  Chang, Jinfeng;  Tian, Hanqin;  Del Grosso, Stephen J.;  Ito, Akihiko;  Chen, Minpeng;  Wang, Qihui;  Bo, Yan;  Cui, Xiaoqing;  Castaldi, Simona;  Juszczak, Radoslaw;  Kasimir, Asa;  Magliulo, Vincenzo;  Medinets, Sergiy;  Medinets, Volodymyr;  Rees, Robert M.;  Wohlfahrt, Georg;  Sabbatini, Simone
收藏  |  浏览/下载:19/0  |  提交时间:2019/11/27
agricultural management  agricultural soils  emission inventory  flux upscaling  land surface model  nitrous oxide  policy analysis  temporal trend  
AIBP-mediated cholesterol efflux instructs hematopoietic stem and progenitor cell fate 期刊论文
SCIENCE, 2019, 363 (6431) : 1085-+
作者:  Gu, Qilin;  Yang, Xiaojie;  Lv, Jie;  Zhang, Jiaxiong;  Xia, Bo;  Kim, Jun-dae;  Wang, Ruoyu;  Xiong, Feng;  Meng, Shu;  Clements, Thomas P.;  Tandon, Bhavna;  Wagner, Daniel S.;  Diaz, Miguel F.;  Wenzel, Pamela L.;  Miller, Yury I.;  Traver, David;  Cooke, John P.;  Li, Wenbo;  Zon, Leonard I.;  Chen, Kaifu;  Bai, Yongping;  Fang, Longhou
收藏  |  浏览/下载:11/0  |  提交时间:2019/11/27
The paraventricular thalamus is a critical thalamic area for wakefulness 期刊论文
SCIENCE, 2018, 362 (6413) : 429-+
作者:  Ren, Shuancheng;  Wang, Yaling;  Yue, Faguo;  Cheng, Xiaofang;  Dang, Ruozhi;  Qiao, Qicheng;  Sun, Xueqi;  Li, Xin;  Jiang, Qian;  Yao, Jiwei;  Qin, Han;  Wang, Guanzhong;  Liao, Xiang;  Gao, Dong;  Xia, Jianxia;  Zhang, Jun;  Hu, Bo;  Yan, Junan;  Wang, Yanjiang;  Xu, Min;  Han, Yunyun;  Tang, Xiangdong;  Chen, Xiaowei;  He, Chao;  Hu, Zhian
收藏  |  浏览/下载:11/0  |  提交时间:2019/11/27
Impacts of species richness on productivity in a large-scale subtropical forest experiment 期刊论文
SCIENCE, 2018, 362 (6410) : 80-+
作者:  Huang, Yuanyuan;  Chen, Yuxin;  Castro-Izaguirre, Nadia;  Baruffol, Martin;  Brezzi, Matteo;  Lang, Anne;  Li, Ying;  Haerdtle, Werner;  von Oheimb, Goddert;  Yang, Xuefei;  Liu, Xiaojuan;  Pei, Kequan;  Both, Sabine;  Yang, Bo;  Eichenberg, David;  Assmann, Thorsten;  Bauhus, Juergen;  Behrens, Thorsten;  Buscot, Francois;  Chen, Xiao-Yong;  Chesters, Douglas;  Ding, Bing-Yang;  Durka, Walter;  Erfmeier, Alexandra;  Fang, Jingyun;  Fischer, Markus;  Guo, Liang-Dong;  Guo, Dali;  Gutknecht, Jessica L. M.;  He, Jin-Sheng;  He, Chun-Ling;  Hector, Andy;  Hoenig, Lydia;  Hu, Ren-Yong;  Klein, Alexandra-Maria;  Kuehn, Peter;  Liang, Yu;  Li, Shan;  Michalski, Stefan;  Scherer-Lorenzen, Michael;  Schmidt, Karsten;  Scholten, Thomas;  Schuldt, Andreas;  Shi, Xuezheng;  Tan, Man-Zhi;  Tang, Zhiyao;  Trogisch, Stefan;  Wang, Zhengwen;  Welk, Erik;  Wirth, Christian;  Wubet, Tesfaye;  Xiang, Wenhua;  Yu, Mingjian;  Yu, Xiao-Dong;  Zhang, Jiayong;  Zhang, Shouren;  Zhang, Naili;  Zhou, Hong-Zhang;  Zhu, Chao-Dong;  Zhu, Li;  Bruelheide, Helge;  Ma, Keping;  Niklaus, Pascal A.;  Schmid, Bernhard
收藏  |  浏览/下载:14/0  |  提交时间:2019/11/27
Factors regulating carbon sinks in mangrove ecosystems 期刊论文
GLOBAL CHANGE BIOLOGY, 2018, 24 (9) : 4195-4210
作者:  Li, Shi-Bo;  Chen, Po-Hung;  Huang, Jih-Sheng;  Hsueh, Mei-Li;  Hsieh, Li-Yung;  Lee, Chen-Lu;  Lin, Hsing-Juh
收藏  |  浏览/下载:3/0  |  提交时间:2019/04/09
Avicennia marina  carbon budget  carbon burial  decomposition  Kandelia obovata  net production