When team members retaliate: The effect of LMX differentiation on team CWB.

Leader-member exchange (LMX) differentiation, or a leader's differentiated treatments among team members, is a prevalent phenomenon in any type of organization due to constraints of personal, social, and organizational resources. Despite numerous empirical examinations of such phenomenon, the impact of LMX differentiation on group outcomes is inconsistent and inconclusive. Based on team diversity framework, we approach LMX differentiation as disparity and draw on social comparison theory and social exchange theory to examine the positive effect of LMX differentiation on team counterproductive work behavior (CWB) through a supervisory justice climate. In addition, we investigate leader competence as an essential boundary condition that influences the impact of LMX differentiation on supervisory justice climate and subsequent team CWB. Using a sample of 94 teams in South Korea, we found that LMX differentiation negatively impacts supervisory justice climate, subsequently promoting team CWB. Furthermore, when team members perceive their leader as incompetent, the positive impact of LMX differentiation on team CWB is strengthened. Theoretical and practical implications and directions for future research are discussed.

Unraveling the perceived overqualification puzzle: The role of distributive justice and leader political skill in influencing knowledge sharing.

Perceived overqualification is a prevalent phenomenon in any type of organization due to overeducation and worldwide economic downturn. Despite numerous empirical examinations of such phenomenon, the impact of perceived overqualification on individual behaviors is inconsistent and inconclusive. We draw on equity theory to examine the negative effect of perceived overqualification on knowledge sharing through distributive justice. In addition, we investigate a leader's political skill as a boundary condition that influences the impact of perceived overqualification on distributive justice and subsequent knowledge sharing. Using a sample of 339 team members in South Korea, we found that perceived overqualification negatively impacts distributive justice, subsequently deteriorating employees' knowledge-sharing behaviors. Furthermore, when team leader is politically skilled, the negative impact of perceived overqualification on knowledge sharing is weakened. Theoretical implications and directions for future research are discussed.

Photoluminescence of Cd1-xMnxS (x < or = 0.3) nanowires.

Cd1-xMnxS (x = 0.1-0.3) nanowires were synthesized by using the chemical vapor deposition method. They all consist of a single-crystalline wurtzite CdS structure with a [010] or [011] growth direction. The X-ray diffraction pattern reveals the contraction of the lattice constants due to the incorporation of Mn. The Mn2+ emission at approximately 2.15 eV, originating from the d-d (4T1 --> 6A1) transition, appears below 50-80 K. Its decay time is in the range of 0.55-1 ms, showing a decrease with increasing Mn content. The Mn doping reduces significantly the decay time of band-edge emission from 590 ps to 20-30 ps. Upon applying magnetic field (up to 7 T), the Mn2+ emission is suppressed and donor-acceptor pair emission becomes dominant, suggesting the energy transfer from the band electrons to the Mn2+ ions.

Synthesis and Magnetic Properties of Manganese-Doped GaP Nanowires.

We characterized the structure and magnetic properties of Mn-incorporated GaP nanowires synthesized by thermal evaporation of GaP/Mn powders. The nanowires consist of twin-crystalline zinc blende GaP grown with the [111] direction and doped with about 1 at. % Mn. They are often sheathed with the bumpy amorphous outerlayers containing high concentrations of Mn and O. The ferromagnetic hysteresis curves at 5 and 300 K and temperature-dependent magnetization provide evidence for the ferromagnetism with the Curie temperature higher than room temperature. Magnetic properties of individual nanowires have been measured, showing a large negative magnetoresistance equal to about -5% at 5 K. We suggest that the Mn doping of GaP nanowires would form a dilute magnetic semiconductor.