P. Dosanjh

Growth and properties of superconducting YBCO single crystals

Large, high quality YBa2Cu3O7-x (YBCO) single crystals have been grown by a flux method and characterized by low field magnetization, a−b plane resistivity, microwave surface resistance and heat capacity measurements. The crystals obtained are nearly free standing after crystal growth and are easily harvested. They have dimensions of up to 5 mm along the a-(b-) axis and up to 1 mm along the c-axis. After oxidation, the crystals show a superconducting transition at Tc=93.2 K with transition width, ΔTc, of < 0.25 K as determined by low field magnetization, a−b plane resistivity and heat capacity data. The heat capacity jump ΔCp of the superconducting transition is 6.9 mJ/(gK).

MICROWAVE SPECTROSCOPY OF THERMALLY EXCITED QUASIPARTICLES IN YBA2CU3O6.99

We present here the microwave surface impedance of a high purity crystal of

Evidence for superconductivity in Li-decorated monolayer graphene

YBa_2Cu_3O_{6.99}

Scanning tunneling spectroscopy of superconducting LiFeAs single crystals: evidence for two nodeless energy gaps and coupling to a bosonic mode.

measured at 5 frequencies between 1 and 75 GHz. This data set reveals the main features of the conductivity spectrum of the thermally excited quasiparticles in the superconducting state. Below 20 K there is a regime of extremely long quasiparticle lifetimes, due to both the collapse of inelastic scattering below

Oxygen-ordering superstructures in underdoped YBa 2 Cu 3 O 6 + x studied by hard x-ray diffraction

T_c

Observation of Weak-Limit Quasiparticle Scattering via Broadband Microwave Spectroscopy of a d-Wave Superconductor

and the very weak impurity scattering in the high purity

Neutron-scattering determination of the structural parameters versus oxygen content of YBa2Cu3O6+x single crystals

BaZrO_3

Superstructure formation and the structural phase diagram of YBa2Cu3O6+x

-grown crystal used in this study. Above 20 K, the scattering increases dramatically, initially at least as fast as

Bound states of defects in superconducting LiFeAs studied by scanning tunneling spectroscopy

T^4

Observation of ortho-III correlations by neutron and hard X-ray scattering in an untwinned YBa2Cu3O6.77 single crystal

.