Crossover from a pseudogap state to a superconducting state

doi:10.1088/1674-1056/19/11/117401

中国物理B ›› 2010, Vol. 19 ›› Issue (11): 117401-117402.doi: 10.1088/1674-1056/19/11/117401

Crossover from a pseudogap state to a superconducting state

曹天德

Department of Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China

收稿日期:2010-04-25 修回日期:2010-05-29 出版日期:2010-11-15 发布日期:2010-11-15

Crossover from a pseudogap state to a superconducting state

Cao Tian-De(曹天德)

Department of Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China

Received:2010-04-25 Revised:2010-05-29 Online:2010-11-15 Published:2010-11-15

摘要/Abstract

摘要： This paper deduces that the particular electronic structure of cuprate superconductors confines Cooper pairs to be first formed in the antinodal region which is far from the Fermi surface, and these pairs are incoherent and result in the pseudogap state. With the change of doping or temperature, some pairs are formed in the nodal region which locates the Fermi surface, and these pairs are coherent and lead to superconductivity. Thus the coexistence of the pseudogap and the superconducting gap is explained when the two kinds of gaps are not all on the Fermi surface. It also shows that the symmetry of the pseudogap and the superconducting gap are determined by the electronic structure, and non-s wave symmetry gap favours the high-temperature superconductivity. Why the high-temperature superconductivity occurs in the metal region near the Mott metal-insulator transition is also explained.

Abstract: This paper deduces that the particular electronic structure of cuprate superconductors confines Cooper pairs to be first formed in the antinodal region which is far from the Fermi surface, and these pairs are incoherent and result in the pseudogap state. With the change of doping or temperature, some pairs are formed in the nodal region which locates the Fermi surface, and these pairs are coherent and lead to superconductivity. Thus the coexistence of the pseudogap and the superconducting gap is explained when the two kinds of gaps are not all on the Fermi surface. It also shows that the symmetry of the pseudogap and the superconducting gap are determined by the electronic structure, and non-s wave symmetry gap favours the high-temperature superconductivity. Why the high-temperature superconductivity occurs in the metal region near the Mott metal-insulator transition is also explained.

Key words: pseudogap, superconductivity, Fermi surface

中图分类号: (Pairing symmetries (other than s-wave))

74.20.Rp

74.25.Jb (Electronic structure (photoemission, etc.)) 74.50.+r (Tunneling phenomena; Josephson effects)

曹天德. Crossover from a pseudogap state to a superconducting state[J]. 中国物理B, 2010, 19(11): 117401-117402.

Cao Tian-De(曹天德). Crossover from a pseudogap state to a superconducting state[J]. Chin. Phys. B, 2010, 19(11): 117401-117402.

参考文献 13

[1]	Renner Ch, Revaz B, Kadowaki K, Maggio-Aprile I and Fischer varnothing 1998 wxPhys. Rev. Lett.80 3606
[2]	Timusk T and Statt B 1999 wxRep. Prog. Phys.62 61
[3]	Geshkenbein V B, Ioffe L B and Larkin A I 1997 wxPhys. Rev. B55 3173
[4]	Emery V, Kivelson S A and Zachar O 1997 wxPhys. Rev. B56 6120
[5]	Schrieffer J R, Wen X G and Zhang S C 1988 wxPhys. Rev. Lett.60 944
[6]	Schmalian J, Pines D and Stojkovic B 1998 wxPhys. Rev. Lett.80 3839
[7]	Kampf A P and Schrieffer J R 1990 wxPhys. Rev. B41 6399
[8]	Mao Z Q, Yang L, Fan C G, Wang N L, Yao Z, Wang Y, Ji M R and Zhang Y H 1993 wxChin. Phys.2 591
[9]	Che G C, Du U K, Jia S L, Yang Y and Zhao Z X 1994 wxChin. Phys.3 64
[10]	Geballe T H 1993 wxScience259 1550
[11]	Kondo T, Khasanov R, Takeuchi T, Schmalian J and Kaminski A 2009 wxNature457 296
[12]	Meng J, Liu G D, Zhang W T, Zhao L, Liu H Y, Jia X W, Mu D X, Liu S Y, Dong X L, Zhang J, Lu W, Wang G L, Zhou Y, Zhu Y, Wang X Y, Xu Z Y, Chen C T and Zhou X J 2009 wxNature462 335
[13]	Cao T D 2010 wxPhysica B: Condensed Matter405 1394

[1]	Xian-Dong Li(李现东), Zuo-Dong Yu(余作东), Wei-Peng Chen(陈伟鹏), and Chang-De Gong(龚昌德). Topological superconductivity in Janus monolayer transition metal dichalcogenides[J]. 中国物理B, 2022, 31(11): 110304-110304.
[2]	. [J]. 中国物理B, 2021, 30(4): 47403-.
[3]	张聪聪, 孙金华, 杨阳, 王万胜. Quasiparticle interference testing the possible pairing symmetry in Sr₂RuO₄[J]. 中国物理B, 2020, 29(6): 67401-067401.
[4]	H Simchi. A simple tight-binding approach to topological superconductivity in monolayer MoS₂[J]. 中国物理B, 2020, 29(2): 27401-027401.
[5]	闻海虎. Specific heat in superconductors[J]. 中国物理B, 2020, 29(1): 17401-017401.
[6]	于家斌, 刘朝星. Surface Majorana flat bands in j=3/2 superconductors with singlet-quintet mixing[J]. 中国物理B, 2020, 29(1): 17402-017402.
[7]	朱兴川, 应涛, 郭怀明, 冯世平. Quantum Monte Carlo study of the dominating pairing symmetry in doped honeycomb lattice[J]. 中国物理B, 2019, 28(7): 77401-077401.
[8]	王斌斌, 王巍, 于顺利, 李建新. Particle-hole fluctuations and possible superconductivity in doped α-RuCl₃[J]. 中国物理B, 2019, 28(5): 57402-057402.
[9]	于一, 汪春昌, 李亮, 李秋菊, 程超, 王舒婷, 张昌锦. Synthesis, physical properties, and annealing investigation of new layered Bi-chalcogenide LaOBiHgS₃[J]. 中国物理B, 2019, 28(1): 17401-017401.
[10]	熊烨. Bloch oscillation of Weyl metal along synthetic dimensions[J]. 中国物理B, 2018, 27(12): 126701-126701.
[11]	王海啸, 刘子衡, 蒋建华. Chiral p-wave pairing of ultracold fermionic atoms due to a quadratic band touching[J]. 中国物理B, 2018, 27(2): 27402-027402.
[12]	杨阳, 冯世全, 向圆圆, 路洪艳, 王万胜. Comparison of band structure and superconductivity in FeSe_0.5Te_0.5 and FeS[J]. 中国物理B, 2017, 26(12): 127401-127401.
[13]	刘军丰, 张欢, 汪军. Novel 0-π transitions in Josephson junctions between noncentrosymmetric superconductors[J]. 中国物理B, 2016, 25(9): 97403-097403.
[14]	张德平, 田光善. The stability of Majorana fermion in correlated quantum wire[J]. 中国物理B, 2015, 24(8): 80401-080401.
[15]	于一, 汪春昌, 汪洪, 李秋菊, 张昌锦, 皮雳, 张裕恒. Applicability of the vortex-glass model for the single crystal Tl_0.4K_0.41Fe_1.71Se₂[J]. 中国物理B, 2015, 24(1): 17401-017401.

Crossover from a pseudogap state to a superconducting state

Crossover from a pseudogap state to a superconducting state

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献 13

相关文章 15

Metrics

本文评价

推荐阅读 0