Optical an Thermodynamic Properties of the High-Temperature Superconductor HgBa{2}CuO{4+delta}

Journal Article · Mon Jan 01 04:00:00 EST 2007 · Physical Review B: Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.75.054522· OSTI ID:930642

van Heumen, E; Lortz, R; Kuzmenko, A; Carbone, F; van der Marel, D; Homes, C; Dordevic, S

In- and out-of-plane optical spectra and specific heat measurements for the single layer cuprate superconductor HgBa{sub 2}CuO{sub 4+{delta}} (Hg-1201) at optimal doping (T{sub c} = 97 K) are presented. Both the in-plane and out-of-plane superfluid density agree well with a recently proposed scaling relation {rho}{sub s} {proportional_to} {sigma}{sub dc} T{sub c}. It is shown that there is a superconductivity induced increase of the in-plane low frequency spectral weight which follows the trend found in underdoped and optimally doped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} (Bi-2212) and optimally doped Bi{sub 2}Sr{sub 2}Ca{sub 2}Cu{sub 3}O{sub 10+{delta}} (Bi-2223). We observe an increase of optical spectral weight which corresponds to a change in kinetic energy {Delta}W {approx} 0.5 meV/Cu which is more than enough to explain the condensation energy. The specific heat anomaly is 10 times smaller than in YBa{sub 2}Cu{sub 3}O{sub 6+{delta}} (YBCO) and 3 times smaller than in Bi-2212. The shape of the anomaly is similar to the one observed in YBCO showing that the superconducting transition is governed by thermal fluctuations.

• Research Organization: Brookhaven National Laboratory (BNL) National Synchrotron Light Source
• Sponsoring Organization: Doe - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 930642
• Report Number(s): BNL--81061-2008-JA
• Journal Information: Physical Review B: Condensed Matter and Materials Physics, Journal Name: Physical Review B: Condensed Matter and Materials Physics Vol. 75
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
COPPER OXIDES
HIGH-TC SUPERCONDUCTORS
KINETIC ENERGY
MERCURY OXIDES
OPTICAL PROPERTIES
SPECIFIC HEAT
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
national synchrotron light source