Petre Badica

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Academic Career Length

32Years (1995-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 July 2006 in Physical Review Letters

Journal Article

S

-Wave Spin-Triplet Order in Superconductors without Inversion Symmetry:

{Li}_{2} {Pd}_{3} B

and

{Li}_{2} {Pt}_{3} B

H. Q. Yuan

D. F. Agterberg

N. Hayashi

Petre Badica

D. Vandervelde

M. B. Salamon

We investigate the order parameter of noncentrosymmetric superconductors

{Li}_{2} {Pd}_{3} B

and

{Li}_{2} {Pt}_{3} B

via the behavior of the penetration depth

λ (T)

. The low-temperature penetration depth shows BCS-like behavior in

{Li}_{2} {Pd}_{3} B

, while in

{Li}_{2} {Pt}_{3} B

it follows a linear temperature dependence. We propose that broken inversion symmetry and the accompanying antisymmetric spin-orbit coupling, which admix spin-singlet and spin-triplet pairing, are responsible for this behavior. The triplet contribution is weak in

{Li}_{2} {Pd}_{3} B

, leading to a wholly open but anisotropic gap. The significantly larger spin-orbit coupling in

{Li}_{2} {Pt}_{3} B

allows the spin-triplet component to be larger in

{Li}_{2} {Pt}_{3} B

, producing line nodes in the energy gap as evidenced by the linear temperature dependence of

λ (T)

. The experimental data are in quantitative agreement with theory.

8 December 2004 in Physical Review Letters

Journal Article

Superconductivity in the Metal Rich Li-Pd-B Ternary Boride

K. Togano

Petre Badica

Y. Nakamori

Shin−ichi Orimo

H. Takeya

K. Hirata

Superconductivity at about 8 K was observed in the metal-rich Li-Pd-B ternary system. Structural, microstructural, electrical, and magnetic investigations for various compositions proved that the

{L i}_{2} {P d}_{3} B

compound, which has an antiperovskite cubic structure composed of distorted

{P d}_{6} B

octahedrons, is responsible for the superconductivity. This is the first observation of superconductivity in metal-rich ternary borides containing alkaline metal and Pd as a late transition metal. The compound prepared by arc melting has a high density and is relatively stable in the air. The upper critical fields

H_{c 2} (0)

estimated by linear extrapolation and the Werthamer-Helfand-Hohenberg theory are 6.2 and 4.8 T, respectively.

1 March 2005 in Journal of the Physical Society of Japan

Journal Article

Superconductivity in a New Pseudo-Binary Li₂B(Pd_1-xPt_x)₃ (x=0–1) Boride System

Petre Badica

Takaaki Kondo

Kazumasa Togano

1 June 2015 in Composites Part B: Engineering

Journal Article

Novel nanocomposites based on epoxy resin/epoxy-functionalized polydimethylsiloxane reinforced with POSS

N.M. Florea

A. Lungu

Petre Badica

L. Craciun

Monica Enculescu

Horia Iovu

1 July 2012 in Physica C: Superconductivity and its Applications

Journal Article

Spark plasma sintering of MgB2 in the two-temperature route

G. Aldica

Dan Batalu

S. Popa

I. Ivan

P. Nita

Petre Badica

29 December 2006 in Physical Review Letters

Journal Article

Angle-Resolved Photoemission Study of the Cobalt Oxide Superconductor

{Na}_{x} {CoO}_{2} \cdot y H_{2} O

: Observation of the Fermi Surface

T. Shimojima

K. Ishizaka

S. Tsuda

T. Kiss

T. Yokoya

K. Togano

The cobalt oxide superconductor

{Na}_{x} {CoO}_{2} \cdot y H_{2} O

is studied by angle-resolved photoemission spectroscopy. We report the Fermi surface (FS) topology and electronic structure near the Fermi level (

E_{F}

) in the normal state of

{Na}_{x} {CoO}_{2} \cdot y H_{2} O

. Our result indicates the presence of the hexagonal FS centered at the

Γ

point, while the small pocket FSs along

Γ − K

direction are absent, similar to

{Na}_{x} {CoO}_{2}

. The top of the

e_{g}^{'}

band, which is expected in band calculations to form the small pocket FSs, extends to within

\sim 30 meV

below

E_{F}

, closer to

E_{F}

than in

{Na}_{x} {CoO}_{2}

. We discuss its possible role in superconductivity, comparing with other experimental and theoretical results.

About Me

Petre BADICA is a Senior Researcher 1st degree at NIMP. He graduated in 1992 from University ‘Politehnica’ Bucharest, Romania and was awarded in 1996 a PhD in Engineering Sciences from National Technical University of Ukraine, ‘Kiev Polytechnical Institute’. He is a former JSPS-STA, NIMS, NEDO, MANA, Alexander von Humboldt fellow and Visiting Prof. of Nanyang Technological University, Singapore and of Tohoku University, Japan. His interest is in synthesis/processing of materials by conventional and unconventional technologies, advanced characterization, physics, and applications of selected materials (biomaterials, refractors and structural materials, superconductors, optoelectronic materials and sensors, archaeometry). He published over 220 articles, 5 awarded patents, 9 book chapters, co-editor of 1 book and received over 70 national and international nominations and medals for inventions. He is a member of American Chemical Society, German Physical Society, European Society for Applied Superconductivity.

Petre Badica

Petre Badica

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About Me