Effects of Vortex Pinning and Thermal Fluctuations on the Josephson Plasma Resonance in Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8} and YBa{sub 2}Cu{sub 3}O{sub 6.5}

Journal Article · Mon May 14 00:00:00 EDT 2001 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.86.4660· OSTI ID:40205797

Dulic, Diana; Hak, S J; van der Marel, D; Hardy, W N; Koshelev, A E; Liang, Ruixing; Bonn, D A; Willemsen, B A

We investigated the temperature dependence and c -axis magnetic field dependence of the Josephson plasma resonance in optimally doped Tl{sub 2}Ba {sub 2}CaCu{sub 2}O{sub 8} thin films and underdoped YBa{sub 2}Cu {sub 3}O{sub 6.5} (YBCO) ortho-II single crystals using infrared spectroscopy. We obtained the c -axis penetration depths, at low temperature, in zero fields of about 20 and 7 {mu}m , respectively. While the temperature dependencies of the resonances in the two compounds are very similar, the magnetic field dependence in YBCO is much weaker. We attribute this weak magnetic field dependence to the lower anisotropy of YBCO and interpret the observed behaviors in terms of thermal fluctuations and pinning of pancake vortices.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: (US)
• OSTI ID: 40205797
• Journal Information: Physical Review Letters, Vol. 86, Issue 20; Other Information: DOI: 10.1103/PhysRevLett.86.4660; Othernumber: PRLTAO000086000020004660000001; 027121PRL; PBD: 14 May 2001; ISSN 0031-9007
• Publisher: The American Physical Society
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANISOTROPY
FLUCTUATIONS
MAGNETIC FIELDS
MONOCRYSTALS
PENETRATION DEPTH
PLASMA
RESONANCE
SPECTROSCOPY
TEMPERATURE DEPENDENCE
THIN FILMS
VORTICES