BCS d-wave behavior in the terahertz electrodynamic response of electron-doped cuprate superconductors

被引：7

作者：

Tagay, Zhenisbek ^{[1
]}

Mahmood, Fahad ^{[1
,2
,3
]}

Legros, Anaelle ^{[1
]}

Sarkar, Tarapada ^{[4
]}

Greene, Richard L. ^{[4
]}

Armitage, N. P. ^{[1
]}

机构：

[1] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[2] Univ Illinois, Dept Phys, Urbana, IL 61801 USA

[3] Univ Illinois, F Seitz Mat Res Lab, Urbana, IL 61801 USA

[4] Univ Maryland, Dept Phys, Maryland Quantum Mat Ctr, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 06期

关键词：

PENETRATION DEPTH; MODEL; CONDUCTIVITY; TEMPERATURE; FILMS;

D O I：

10.1103/PhysRevB.104.064501

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Although cuprate superconductors have been intensively studied for the past decades, there is no consensus regarding the microscopic origin of their superconductivity. In this paper, we measure the low-energy electro-dynamic response of slightly underdoped and overdoped La2-xCexCuO4 thin films using time-domain terahertz (THz) spectroscopy to determine the temperature and field dependence of the superfluid spectral weight. We show that the temperature dependence obeys the relation n(s) proportional to 1 - (T/T-c)(2), typical for dirty limit BCS-like d-wave superconductors. Furthermore, the magnetic field dependence was found to follow a sublinear root B form, which supports predictions based on a d-wave symmetry for the superconducting gap. These observations imply that the superconducting order in these electron-doped cuprates can be well described in terms of a disordered BCS d-wave formalism.

引用

页数：6

共 32 条

[1] Progress and perspectives on electron-doped cuprates [J].

Armitage, N. P. ;

Fournier, P. ;

Greene, R. L. .

REVIEWS OF MODERN PHYSICS, 2010, 82 (03) :2421-2487

[2] 2-FLUID MODEL OF SUPERCONDUCTIVITY [J].

BARDEEN, J .

PHYSICAL REVIEW LETTERS, 1958, 1 (11) :399-400

[3] Dependence of the critical temperature in overdoped copper oxides on superfluid density [J].

Bozovic, I. ;

He, X. ;

Wu, J. ;

Bollinger, A. T. .

NATURE, 2016, 536 (7616) :309-+

[4] CONDUCTIVITY OF SUPERCONDUCTING FILMS - A SUM RULE [J].

FERRELL, RA ;

GLOVER, RE .

PHYSICAL REVIEW, 1958, 109 (04) :1398-1399

[5] EFFECT OF STRONG SCATTERING ON THE LOW-TEMPERATURE PENETRATION DEPTH OF A D-WAVE SUPERCONDUCTOR [J].

HIRSCHFELD, PJ ;

GOLDENFELD, N .

PHYSICAL REVIEW B, 1993, 48 (06) :4219-4222

[6] D-WAVE MODEL FOR MICROWAVE RESPONSE OF HIGH-T(C) SUPERCONDUCTORS [J].

HIRSCHFELD, PJ ;

PUTIKKA, WO ;

SCALAPINO, DJ .

PHYSICAL REVIEW B, 1994, 50 (14) :10250-10264

[7] Link between spin fluctuations and electron pairing in copper oxide superconductors [J].

Jin, K. ;

Butch, N. P. ;

Kirshenbaum, K. ;

Paglione, J. ;

Greene, R. L. .

NATURE, 2011, 476 (7358) :73-75

[8] Selective formation of apical oxygen vacancies in La2-xSrxCuO4 [J].

Kim, Gideok ;

Christiani, Georg ;

Logvenov, Gennady ;

Choi, Sungkyun ;

Kim, Hun-Ho ;

Minola, M. ;

Keimer, B. .

PHYSICAL REVIEW MATERIALS, 2017, 1 (05)

[9] Magnetic penetration depth measurements of Pr2-xCexCuO4-δ films on buffered substrates:: Evidence for a nodeless gap -: art. no. 087001 [J].

Kim, MS ;

Skinta, JA ;

Lemberger, TR ;

Tsukada, A ;

Naito, M .

PHYSICAL REVIEW LETTERS, 2003, 91 (08)

[10] Microwave electrodynamics of electron-doped cuprate superconductors [J].

Kokales, JD ;

Fournier, P ;

Mercaldo, LV ;

Talanov, VV ;

Greene, RL ;

Anlage, SM .

PHYSICAL REVIEW LETTERS, 2000, 85 (17) :3696-3699

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