Complex conductance of ultrathin La2-xSrxCuO4 films and heterostructures
Abstract
We used atomic-layer molecular beam epitaxy to synthesize bilayers of a cuprate metal (La1.55Sr0.45CuO4) and a cuprate insulator (La2CuO4), in which each layer is just one unit cells thick. We have studied the magnetic field and temperature dependence of the complex sheet conductance, σ(ω), of these films. Experiments have been carried out at frequencies between 2 and 50 MHz using the single-spiral coil technique. We found that: (i) the inductive response starts at ΔT = 3 K lower temperatures than Re σ(T), which in turn is characterized by a peak close to the transition, (ii) this shift is almost constant with magnetic field up to 14 mT; (iii) ΔT increases sharply up to 4 K at larger fields and becomes constant up to 8 T; (iv) the vortexdiffusion constant D(T) is not linear with T at low temperatures as in the case of free vortices, but is rather exponential due to pinning of vortex cores, and (v) the dynamic Berezinski–Kosterlitz–Thouless (BKT) transition temperature occurs at the point where Y=(lω/ξ+)2 = 1. As a result, our experimental results can be described well by the extended dynamic theory of the BKT transition and dynamics of bound vortex–antivortex pairs with short separation lengths.
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States); Yale Univ., New Haven, CT (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1240709
- Report Number(s):
- BNL-111883-2016-JA
Journal ID: ISSN 1063-777X; LTPHEG; R&D Project: MA509MACA; KC0203020
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Low Temperature Physics
- Additional Journal Information:
- Journal Volume: 41; Journal Issue: 12; Journal ID: ISSN 1063-777X
- Publisher:
- AIP
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; superconducting heterostructures; high-frequency conductivity; Berezinski-Kosterlitz-Thouless transition; rotating flows; coils; inductance; magnetic fields; metallic thin films
Citation Formats
V. A. Gasparov, and Bozovic, I. Complex conductance of ultrathin La2-xSrxCuO4 films and heterostructures. United States: N. p., 2015.
Web. doi:10.1063/1.4935694.
V. A. Gasparov, & Bozovic, I. Complex conductance of ultrathin La2-xSrxCuO4 films and heterostructures. United States. https://doi.org/10.1063/1.4935694
V. A. Gasparov, and Bozovic, I. Fri .
"Complex conductance of ultrathin La2-xSrxCuO4 films and heterostructures". United States. https://doi.org/10.1063/1.4935694. https://www.osti.gov/servlets/purl/1240709.
@article{osti_1240709,
title = {Complex conductance of ultrathin La2-xSrxCuO4 films and heterostructures},
author = {V. A. Gasparov and Bozovic, I.},
abstractNote = {We used atomic-layer molecular beam epitaxy to synthesize bilayers of a cuprate metal (La1.55Sr0.45CuO4) and a cuprate insulator (La2CuO4), in which each layer is just one unit cells thick. We have studied the magnetic field and temperature dependence of the complex sheet conductance, σ(ω), of these films. Experiments have been carried out at frequencies between 2 and 50 MHz using the single-spiral coil technique. We found that: (i) the inductive response starts at ΔT = 3 K lower temperatures than Re σ(T), which in turn is characterized by a peak close to the transition, (ii) this shift is almost constant with magnetic field up to 14 mT; (iii) ΔT increases sharply up to 4 K at larger fields and becomes constant up to 8 T; (iv) the vortexdiffusion constant D(T) is not linear with T at low temperatures as in the case of free vortices, but is rather exponential due to pinning of vortex cores, and (v) the dynamic Berezinski–Kosterlitz–Thouless (BKT) transition temperature occurs at the point where Y=(lω/ξ+)2 = 1. As a result, our experimental results can be described well by the extended dynamic theory of the BKT transition and dynamics of bound vortex–antivortex pairs with short separation lengths.},
doi = {10.1063/1.4935694},
journal = {Low Temperature Physics},
number = 12,
volume = 41,
place = {United States},
year = {Fri Oct 23 00:00:00 EDT 2015},
month = {Fri Oct 23 00:00:00 EDT 2015}
}
Free Publicly Available Full Text
Publisher's Version of Record
Other availability
Search WorldCat to find libraries that may hold this journal
Cited by: 1 work
Citation information provided by
Web of Science
Web of Science
Save to My Library
You must Sign In or Create an Account in order to save documents to your library.
Works referenced in this record:
Ordering, metastability and phase transitions in two-dimensional systems
journal, April 1973
- Kosterlitz, J M; Thouless, D J
- Journal of Physics C: Solid State Physics, Vol. 6, Issue 7, p. 1181-1203
Kosterlitz-Thouless transition and charge redistribution in the superconductivity of YBCO/PBCO superlattices
journal, June 1991
- Rasolt, Mark; Edis, Taner; Tešanović, Zlatko
- Physical Review Letters, Vol. 66, Issue 22
Vortex fluctuations and two-dimensional Coulomb-gas scaling for crystallineYBa 2 Cu 3 O 7 − x PrBa 2 Cu 3 O 7 − x
journal, March 1992
- Minnhagen, Petter; Olsson, Peter
- Physical Review B, Vol. 45, Issue 10
Superconductivity of one-unit-cell thick thin film
journal, September 1991
- Terashima, T.; Shimura, K.; Bando, Y.
- Physical Review Letters, Vol. 67, Issue 10
High critical current densities in ultrathin YBa 2 Cu 3 O 7−δ films sandwiched between (Pr x Y 1− x )Ba 2 Cu 3 O 7−δ layers
journal, March 1993
- Kwon, C.; Li, Qi; Xi, X. X.
- Applied Physics Letters, Vol. 62, Issue 11
Origin of theT c YBa 2 Cu 3 O 7 − δ
journal, November 1994
- Cieplak, Marta Z.; Guha, S.; Vadlamannati, S.
- Physical Review B, Vol. 50, Issue 17
Absence of a Kosterlitz-Thouless transition in ultrathin films
journal, October 1996
- Repaci, J. M.; Kwon, C.; Li, Qi
- Physical Review B, Vol. 54, Issue 14
Normal-superconducting phase transition mimicked by current noise
journal, October 2004
- Sullivan, M. C.; Frederiksen, T.; Repaci, J. M.
- Physical Review B, Vol. 70, Issue 14
Size Effects in the Nonlinear Resistance and Flux Creep in a Virtual Berezinskii-Kosterlitz-Thouless State of Superconducting Films
journal, June 2008
- Gurevich, A.; Vinokur., V. M.
- Physical Review Letters, Vol. 100, Issue 22
Possibility of Vortex-Antivortex Pair Dissociation in Two-Dimensional Superconductors
journal, April 1979
- Beasley, M. R.; Mooij, J. E.; Orlando, T. P.
- Physical Review Letters, Vol. 42, Issue 17, p. 1165-1168
Renormalization of the Mean-Field Superconducting Penetration Depth in Epitaxial YBa 2 Cu 3 O 7
journal, September 1988
- Fiory, A. T.; Hebard, A. F.; Mankiewich, P. M.
- Physical Review Letters, Vol. 61, Issue 12
Kosterlitz-Thouless transition in high-T c
journal, July 1990
- Davis, L. C.; Beasley, M. R.; Scalapino, D. J.
- Physical Review B, Vol. 42, Issue 1
Brownian motion of vortex-antivortex excitations in very thin films of
journal, July 1992
- Rogers, C. T.; Myers, K. E.; Eckstein, J. N.
- Physical Review Letters, Vol. 69, Issue 1
The two-dimensional Coulomb gas, vortex unbinding, and superfluid-superconducting films
journal, October 1987
- Minnhagen, Petter
- Reviews of Modern Physics, Vol. 59, Issue 4
Dissipation in Two-Dimensional Superfluids
journal, March 1978
- Ambegaokar, Vinay; Halperin, B. I.; Nelson, David R.
- Physical Review Letters, Vol. 40, Issue 12
Dynamics of superfluid films
journal, March 1980
- Ambegaokar, Vinay; Halperin, B. I.; Nelson, David R.
- Physical Review B, Vol. 21, Issue 5
Resistive transition in superconducting films
journal, September 1979
- Halperin, B. I.; Nelson, David R.
- Journal of Low Temperature Physics, Vol. 36, Issue 5-6
Magnetic field, temperature and frequency dependence of complex conductance of ultra thin YBa2Cu3O7-xfilms
journal, March 2009
- Gasparov, V.; Zhukova, E.; Voronkov, A.
- Journal of Physics: Conference Series, Vol. 150, Issue 5
Magnetic field and temperature dependence of complex conductance of ultrathin La Sr CuO /La CuO films
journal, September 2012
- Gasparov, V. A.; Božović, I.
- Physical Review B, Vol. 86, Issue 9
Magnetic field, frequency and temperature dependence of complex conductance of ultrathin La1.65Sr0.45CuO4∕La2CuO4 films and the organic superconductors κ-(BEDT-TTF)2Cu[N(CN)2]Br
journal, October 2015
- Gasparov, V. A.; He, Xi; Dubuis, G.
- International Journal of Modern Physics B, Vol. 29, Issue 25n26
Atomic-layer engineering of superconducting oxides: yesterday, today, tomorrow
journal, March 2001
- Bozovic, I.
- IEEE Transactions on Appiled Superconductivity, Vol. 11, Issue 1
High-temperature interface superconductivity between metallic and insulating copper oxides
journal, October 2008
- Gozar, A.; Logvenov, G.; Kourkoutis, L. Fitting
- Nature, Vol. 455, Issue 7214, p. 782-785
High-Temperature Superconductivity in a Single Copper-Oxygen Plane
journal, October 2009
- Logvenov, G.; Gozar, A.; Bozovic, I.
- Science, Vol. 326, Issue 5953
Temperature dependence of the penetration depth in epitaxial Y1Ba2Cu3O7−x thin films
journal, August 1991
- Gasparov, V. A.; Oganesyan, A. P.
- Physica C: Superconductivity, Vol. 178, Issue 4-6
Very high resolution measurement of the penetration depth of superconductors by a novel single-coil inductance technique
journal, May 2000
- Gauzzi, A.; Le Cochec, J.; Lamura, G.
- Review of Scientific Instruments, Vol. 71, Issue 5
Penetration depths of high T c films measured by two‐coil mutual inductances
journal, June 1988
- Fiory, A. T.; Hebard, A. F.; Mankiewich, P. M.
- Applied Physics Letters, Vol. 52, Issue 25
Inductive conductance measurements in two‐dimensional superconducting systems
journal, November 1989
- Jeanneret, B.; Gavilano, J. L.; Racine, G. A.
- Applied Physics Letters, Vol. 55, Issue 22
Noncontacting measurement of the inductive nonlinearity of a superconducting thin film
journal, January 2003
- Claassen, J. H.
- Applied Physics Letters, Vol. 82, Issue 4
Numerical modeling and experimental considerations for a two-coil apparatus to measure the complex conductivity of superconducting films
journal, April 1998
- Turneaure, Stefan J.; Pesetski, Aaron A.; Lemberger, Thomas R.
- Journal of Applied Physics, Vol. 83, Issue 8
Berezinskii-Kosterlitz-Thouless transition and fluctuation paraconductivity in Y1Ba2Cu3O7 single crystal films
journal, August 1991
- Gasparov, V. A.
- Physica C: Superconductivity, Vol. 178, Issue 4-6
Two-gap superconductivity in : Temperature dependence of critical magnetic fields in single crystals
journal, March 2006
- Gasparov, V. A.; Sidorov, N. S.; Zver’kova, I. I.
- Physical Review B, Vol. 73, Issue 9
Sub-millikelvin stabilization of a closed cycle cryocooler
journal, October 2014
- Dubuis, Guy; He, Xi; Božović, Ivan
- Review of Scientific Instruments, Vol. 85, Issue 10
Works referencing / citing this record:
Dopant size effects on novel functionalities: High-temperature interfacial superconductivity
journal, March 2017
- Suyolcu, Y. Eren; Wang, Yi; Baiutti, Federico
- Scientific Reports, Vol. 7, Issue 1