Three dimensional spider-web-like superconducting filamentary paths in KxFe2−ySe2K_xFe_{2-y}Se_2 single crystals

Since the discovery of high temperature superconductivity in F-doped LaFeAsO, many new iron based superconductors with different structures have been fabricated2. The observation of superconductivity at about 32 K in KxFe2-ySe2 with the iso-structure of the FeAs-based 122 superconductors was a surprise and immediately stimulated the interests because the band structure calculation8 predicted the absence of the hole pocket which was supposed to be necessary for the theoretical picture of S+- pairing. Soon later, it was found that the material may separate into the insulating antiferromagnetic K2Fe4Se5 phase and the superconducting phase. It remains unresolved that how these two phases coexist and what is the parent phase for superconductivity. In this study we use different quenching processes to produce the target samples with distinct microstructures, and apply multiple measuring techniques to reveal a close relationship between the microstructures and the global appearance of superconductivity. In addition, we clearly illustrate three dimensional spider-web-like superconducting filamentary paths, and for the first time propose that the superconducting phase may originate from a state with one vacancy in every eight Fe-sites with the root8*root10 parallelogram structure.Comment: 22 pages, 7 figure

The Co-Evolution of the Internet and Civil Society in China

Civil society and the Internet energize each other in their co-evolutionary development in China. The Internet facilitates civil society activities by offering new possibilities for citizen participation. Civil society facilitates the development of the Internet by providing the necessary social basis—citizens and citizen groups—for communication and interaction. These arguments are illustrated with an analysis of the discourse in Qiangguo Luntan [Strengthening the Nation Forum] and an ethnographic study of Huaxia Zhiqing [Chinese Educated Youth],

Online Activism

Online activism is a new form of popular contention in China. In some cases, the Internet serves to mobilize street protest. More often, protest takes place online. The most common forms include online petitions, the hosting of campaign websites, and large-scale verbal protests. The most radical is perhaps the hacking of websites. These forms of contention may be found in blogs, Internet bulletin boards, online communities, and podcast and YouTube-type web sites

Environmental NGOs and Institutional Dynamics in China

Environmental non-governmental organizations are becoming increasingly visible players in China’s environmental politics. Adopting a field perspective, this article shows how the rise of environmental NGOs has taken place in interactions with four institutional fields. They not only respond to political conditions, but also to opportunities offered by the media, the internet, and international NGOs. In this process, organizational entrepreneurs play a crucial role in mobilizing resources while other individuals participate in search of self-fulfillment or social experience. These arguments underscore the multi-institutional dynamics of civil society development without underestimating state-centered and market-centered explanations. In conclusion, the article discusses how environmental NGOs can serve as both sites and agents of democratic social change in China

Internet Activism & the Party-State in China

The history of Internet activism and Internet control in China is one of mutual adaptation between citizen activists and party authorities. The party-state initially reacted to Internet activism with alarm, but has since built a comprehensive approach combining repressive policing with gentler methods of social management. This approach has evolved in response to the diverse forms of and participants in Internet activism. But the adaptability of the Chinese Internet control regime does not mean that it will root out Internet activism. On the contrary, Internet activism will continue to grow and will itself adapt to the changing forms of control. Comparisons with Russia and the United States highlight how political economy, history, and everyday practice shape the forms of Internet activism and control

Narrative Agency in Hashtag Activism: The Case of #BlackLivesMatter

Hashtag activism happens when large numbers of postings appear on social media under a common hashtagged word, phrase or sentence with a social or political claim. The temporal unfolding of these mutually connected postings in networked spaces gives them a narrative form and agency. Applying Karlyn Campbell’s propositions about rhetorical agency to the case of #BlackLivesMatter, this essay shows that narrative agency in hashtag activism derives from its narrative form as well as from its contents and social context. Narrative agency is communal, invented, skillful, and protean