Electronic origin of high-temperature superconductivity in single-layer FeSe superconductor
Defa Liu,Wenhao Zhang,Wenhao Zhang,Daixiang Mou,Junfeng He,Yunbo Ou,Qingyan Wang,Qingyan Wang,Zhi Li,Lili Wang,Lin Zhao,Shaolong He,Yingying Peng,Xu Liu,Chaoyu Chen,Li Yu,Guodong Liu,Xiaoli Dong,Jun Zhang,Chuangtian Chen,Zuyan Xu,Jiangping Hu,Jiangping Hu,Xi Chen,Xucun Ma,Qi-Kun Xue,Xingjiang Zhou +26 more
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TLDR
Investigations of the electronic structure and superconducting gap of the single-layer FeSe superconductor establish a clear case that such a simple electronic structure is compatible with high-T(c) superconductivity in iron-based superconductors.Abstract:
The exact mechanism for superconductivity in iron-based superconductors remains elusive, but is thought to involve complex interactions between many orbitals. Using angle-resolved photoelectron spectroscopy, Liu et al. report the electronic structure of the single-layer parent compound FeSe.read more
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Progress, Challenges, and Opportunities in Two-Dimensional Materials Beyond Graphene
Sheneve Z. Butler,Shawna M. Hollen,Linyou Cao,Yi Cui,Yi Cui,Jay Gupta,Humberto R. Gutierrez,Tony F. Heinz,Seung Sae Hong,Seung Sae Hong,Jiaxing Huang,Ariel Ismach,Ezekiel Johnston-Halperin,Masaru Kuno,Vladimir V. Plashnitsa,Richard D. Robinson,Rodney S. Ruoff,Sayeef Salahuddin,Jie Shan,Li Shi,Michael G. Spencer,Mauricio Terrones,Wolfgang Windl,Joshua E. Goldberger +23 more
TL;DR: The properties and advantages of single-, few-, and many-layer 2D materials in field-effect transistors, spin- and valley-tronics, thermoelectrics, and topological insulators, among many other applications are highlighted.
Journal ArticleDOI
Phase diagram and electronic indication of high-temperature superconductivity at 65 K in single-layer FeSe films
Shaolong He,Junfeng He,Wenhao Zhang,Wenhao Zhang,Lin Zhao,Defa Liu,Xu Liu,Daixiang Mou,Yunbo Ou,Qingyan Wang,Qingyan Wang,Zhi Li,Lili Wang,Yingying Peng,Yan Liu,Chaoyu Chen,Li Yu,Guodong Liu,Xiaoli Dong,Jun Zhang,Chuangtian Chen,Zuyan Xu,Xi Chen,Xucun Ma,Qi-Kun Xue,Xingjiang Zhou +25 more
TL;DR: The phase diagram for an FeSe monolayer grown on a SrTiO3 substrate is reported, by tuning the charge carrier concentration over a wide range through an extensive annealing procedure, and strong indications of superconductivity are observed with a transition temperature of 65±5 K.
Journal ArticleDOI
Interfacial mode coupling as the origin of the enhancement of T(c) in FeSe films on SrTiO3.
J. J. Lee,F. Schmitt,Robert G. Moore,Steven Johnston,Yong-Tao Cui,Wei Li,M. Yi,Zhongkai Liu,Makoto Hashimoto,Yi Zhang,D. H. Lu,Thomas P. Devereaux,D.-H. Lee,Zhi-Xun Shen +13 more
TL;DR: High-resolution angle-resolved photoemission spectroscopy results reveal an unexpected characteristic of the single-unit-cell FeSe/SrTiO3 system: shake-off bands suggesting the presence of bosonic modes, most probably oxygen optical phonons in SrTiO2, which couple to the FeSe electrons with only a small momentum transfer.
Journal ArticleDOI
Interface-induced superconductivity and strain-dependent spin density waves in FeSe/SrTiO3 thin films.
Shiyong Tan,Yan Zhang,M. Xia,Z. R. Ye,Fei Chen,Xin Xie,Rui Peng,D. F. Xu,Q. Fan,Haichao Xu,Juan Jiang,Tong Zhang,Xinchun Lai,Tao Xiang,Jiangping Hu,Binping Xie,Donglai Feng +16 more
TL;DR: It is demonstrated that the superconductivity occurs when the electrons transferred from the oxygen-vacant substrate suppress the otherwise pronounced SDWs in single-layer FeSe, and the phase diagram of FeSe is mapped out as a function of lattice constant, which contains all the essential physics of Fe-HTS.
Journal ArticleDOI
Phase Diagram and High Temperature Superconductivity at 65 K in Tuning Carrier Concentration of Single-Layer FeSe Films
Shaolong He,Junfeng He,Wenhao Zhang,Lin Zhao,Defa Liu,Xu Liu,Daixiang Mou,Yunbo Ou,Qingyan Wang,Zhi Li,Lili Wang,Yingying Peng,Yan Liu,Chaoyu Chen,Li Yu,Guodong Liu,Xiaoli Dong,Jun Zhang,Chuangtian Chen,Zuyan Xu,Xi Chen,Xucun Ma,Qi-Kun Xue,X. J. Zhou +23 more
TL;DR: In this article, a phase diagram in the single-layer FeSe films grown on SrTiO3 substrate by an annealing procedure to tune the charge carrier concentration over a wide range is presented.
References
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Journal ArticleDOI
Iron-Based Layered Superconductor La[O1-xFx]FeAs (x = 0.05−0.12) with Tc = 26 K
TL;DR: It is reported that a layered iron-based compound LaOFeAs undergoes superconducting transition under doping with F- ions at the O2- site and exhibits a trapezoid shape dependence on the F- content.
Journal ArticleDOI
Superconductivity in the PbO-type structure α-FeSe
F. C. Hsu,J. Y. Luo,Kuo-Wei Yeh,Ta-Kun Chen,T. W. Huang,Phillip M. Wu,Yong-Chi Lee,Yi-Lin Huang,Yan-Yi Chu,Der-Chung Yan,Maw-Kuen Wu +10 more
TL;DR: The observation of superconductivity with zero-resistance transition temperature at 8 K in the PbO-type α-FeSe compound is reported, indicating that this compound has the same, perhaps simpler, planar crystal sublattice as the layered oxypnictides.
Journal ArticleDOI
Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2.
TL;DR: The ternary iron arsenide (BaFe) becomes superconducting by hole doping, which was achieved by partial substitution of the barium site with potassium as mentioned in this paper, which was the first superconductivity discovery.
Journal ArticleDOI
Unconventional Superconductivity with a Sign Reversal in the Order Parameter of LaFeAsO 1-x F x
TL;DR: It is argued that the newly discovered superconductivity in a nearly magnetic, Fe-based layered compound is unconventional and mediated by antiferromagnetic spin fluctuations, though different from the usual superexchange and specific to this compound.
Journal ArticleDOI
Superconductivity at 55 K in Iron-Based F-Doped Layered Quaternary Compound Sm[O1-xFx] FeAs
Ren Zhi-An,Lu Wei,Yang Jie,Yi Wei,Shen Xiao-Li,Zheng-Cai,Che Guang-Can,Dong Xiao-Li,Sun Li-Ling,Zhou Fang,Zhao Zhong-Xian +10 more
TL;DR: In this article, the superconductivity of iron-based oxyarsenide Sm[O1-xFx]FeAs was reported, with the onset resistivity transition temperature at 55.0K and Meissner transition at 54.6 K. This compound has the same crystal structure as LaOFeAs with shrunk crystal lattices.