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Superconducting Density of States in B-Doped Diamond

100%

Onufriienko O., Samuely T., Zhang G., Vanacken J., Xu Z., May P., Szabó P., Moshchalkov V., Samuely P.

Acta Physica Polonica A

2017

vol. 131

issue 4

1033-1035

In the presented work, we investigated the superconducting boron doped diamond polycrystalline film prepared by chemical vapor deposition by means of scanning tunneling microscopy/spectroscopy. Differential conductance spectra measured at various temperatures were used to obtain the values of superconducting critical temperature and energy gap. Comparing various theoretical models fitted to the differential conductance spectra measured at 0.5 K suggests weak pair breaking. However, this cannot account for the high 2Δ/(k_{B}T_{C}) ratio, which therefore indicates strong coupling.

Magnetoresistance Anisotropy and Magnetic H-T Phase Diagram of Tm_{0.996}Yb_{0.004}B_{12}

81%

Sluchanko N., Azarevich A., Bogach A., Glushkov V., Demishev S., Gavrilkin S., Gabani S., Flachbart K., Shitsevalova N., Filipov V., Vanacken J., Moshchalkov V., Stankiewicz J.

Acta Physica Polonica A

2014

vol. 126

issue 1

332-333

The antiferromagnetic ground state has been studied by transverse magnetoresistance, heat capacity and magnetization measurements, which were carried out on high quality single crystals of Tm_{0.996}Yb_{0.004}B_{12} dodecaboride in strong magnetic fields at liquid helium temperatures. Both antiferromagnetic-paramagnetic (AF-P) and spin-orientation (AF1-AF2) phase transitions have been observed, and allowed to construct a complicated magnetic H-T phase diagram for this compound. Strong magnetoresistance anisotropy was found both in AF states (ρ(H||[110])/ρ(H||[111])~ 1.2 at H~ 20 kOe) and at the critical field of AF-P transition (H_{N}[100]/H_{N}[111]~ 1.25) in this magnetic metal with a simple fcc crystal structure.

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2 Acta Physica Polonica A

1 2017

1 2014

2 Moshchalkov V.

2 Vanacken J.

1 Azarevich A.

1 Bogach A.

1 Demishev S.

1 Filipov V.

1 Flachbart K.

1 Gabani S.

1 Gavrilkin S.

1 Glushkov V.

1 May P.

1 Onufriienko O.

1 Samuely P.

1 Samuely T.

1 Shitsevalova N.

1 Sluchanko N.

1 Stankiewicz J.

1 Szabó P.

1 Xu Z.

1 Zhang G.

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Superconducting Density of States in B-Doped Diamond

Magnetoresistance Anisotropy and Magnetic H-T Phase Diagram of Tm_{0.996}Yb_{0.004}B_{12}