Pseudogap of of Ortho-III YBa2Cu3O7-x from Cu EPR investigation

被引：6

作者：

Kuang, Min-Quan ^{[1
]}

Wu, Shao-Yi ^{[2
]}

Yuan, Hong-Kuan ^{[1
]}

Wang, Li-Dan ^{[3
]}

Duan, Shu-Kai ^{[3
]}

Kuang, An-Long ^{[1
]}

Li, Guo-Qing ^{[1
]}

机构：

[1] Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China

[2] Univ Elect Sci & Technol China, Sch Phys Elect, Dept Appl Phys, Chengdu 610054, Peoples R China

[3] Southwest Univ, Coll Elect & Informat Engn, Chongqing 400715, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 690卷

关键词：

Pseudogap; Pseudo Jahn-Teller effect; Electron paramagnetic resonance (EPR); YBa2Cu3O7-x; ELECTRON-SPIN-RESONANCE; KNIGHT-SHIFTS; SUPERCONDUCTING PROPERTIES; PARAMAGNETIC-RESONANCE; CHARGE ORDER; NORMAL-STATE; PHASE; SITE; YBA2CU3O6+DELTA; SUSCEPTIBILITY;

D O I：

10.1016/j.jallcom.2016.08.044

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The temperature dependences of g factors of underdoped YBa2Cu3O7-x (T-c approximate to 86.5 K) indicate that the pseudogap onset temperature T* (approximate to 190 K) coincides with the phase boundary established by resistivity, Nernst effect, neutron diffraction and ultrasound measurements in YBCO phase diagram. The obtained empirical relationship between g factors and pseudogap is appropriate for the entire charactering temperature range of Ortho-III YBCO. The EPR signals are ascribed to the localized Cu2+(1) sites based on the quantitative calculations of the g factors by involving the local structures of the paramagnetic copper (1) sites. The present work provides another potential spectroscopic probe for the pseudogap in underdoped high Tc superconductors and the origin of EPR and related mechanisms in YBCO which are still controversial. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：169 / 175

页数：7

共 54 条

[1]

Albino J., 1988, J PHYS C SOLID STATE, V21, pL237

[2] Spin gap, phase separation and d-wave pairing as revealed by electron spin-lattice relaxation in 123 and 124 YBaCuO systems doped with Gd3+ [J].

Atsarkin, VA ;

Demidov, VV ;

Vasneva, GA ;

Böttger, G ;

Gutmann, M .

APPLIED MAGNETIC RESONANCE, 2000, 19 (3-4) :329-337

[3] Superconducting properties of zinc substitution in Tl-2223 phase [J].

Awad, R. ;

Abou-Aly, A. I. ;

Ibrahim, I. H. ;

El-Korek, M. ;

Isber, S. ;

Faraj, A. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 460 (1-2) :500-506

[4] Evidence of a critical hole concentration in underdoped YBa2Cu3Oy single crystals revealed by 63Cu NMR [J].

Baek, S. -H. ;

Loew, T. ;

Hinkov, V. ;

Lin, C. T. ;

Keimer, B. ;

Buechner, B. ;

Grafe, H. -J. .

PHYSICAL REVIEW B, 2012, 86 (22)

[5] Electron paramagnetic resonance of high-Tc superconducting composites YBa2Cu3-xScxO6±δ [J].

Banacky, P ;

Pelikán, P ;

Valko, M ;

Buchta, S ;

Hanic, F ;

Cigan, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (10) :1943-1946

[6] Mechanical properties of Y3-xNdxBa5-xCaxCu8O18-δ samples [J].

Barakat, M. Me. ;

Abou-Aly, A. I. ;

Awad, R. ;

Aly, N. S. ;

Ibrahim, S. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2015, 652 :158-166

[7] X-Ray Diffraction Observations of a Charge-Density-Wave Order in Superconducting Ortho-II YBa2Cu3O6.54 Single Crystals in Zero Magnetic Field [J].

Blackburn, E. ;

Chang, J. ;

Huecker, M. ;

Holmes, A. T. ;

Christensen, N. B. ;

Liang, Ruixing ;

Bonn, D. A. ;

Hardy, W. N. ;

Ruett, U. ;

Gutowski, O. ;

v Zimmermann, M. ;

Forgan, E. M. ;

Hayden, S. M. .

PHYSICAL REVIEW LETTERS, 2013, 110 (13)

[8] Interplay between Static and Dynamic Properties of Semifluxons in YBa2Cu3O7-δ 0-π Josephson Junctions [J].

Cedergren, K. ;

Kirtley, J. R. ;

Bauch, T. ;

Rotoli, G. ;

Troeman, A. ;

Hilgenkamp, H. ;

Tafuri, F. ;

Lombardi, F. .

PHYSICAL REVIEW LETTERS, 2010, 104 (17)

[9]

Chakravarty A.S., 1980, Introduction to the magnetic properties of solids

[10]

Chang J, 2012, NAT PHYS, V8, P871, DOI [10.1038/NPHYS2456, 10.1038/nphys2456]

← 1 2 3 4 5 6 →