Mechanism of Ambipolar Field-Effect Carrier Injections in One-Dimensional Mott Insulators

Details Mechanism of Ambipolar Field-Effect Carrier Injections in One-Dimensional Mott Insulators Mechanism of Ambipolar Field-Effect Carrier Injections in One-Dimensional Mott Insulators

2005-06-27

arxiv.org/abs/cond-mat/0506689v1

J. Phys. Soc. Jpn. 74, 2544 (2005)

Physics

Condensed Matter

Strongly Correlated Electrons

21 pages, 10 figures, to appear in J. Phys. Soc. Jpn

Scientific paper

10.1143/JPSJ.74.2544

To clarify the mechanism of recently reported, ambipolar carrier injections into quasi-one-dimensional Mott insulators on which field-effect transistors are fabricated, we employ the one-dimensional Hubbard model attached to a tight-binding model for source and drain electrodes. To take account of the formation of Schottky barriers, we add scalar and vector potentials, which satisfy the Poisson equation with boundary values depending on the drain voltage, the gate bias, and the work-function difference. The current-voltage characteristics are obtained by solving the time-dependent Schr\"odinger equation in the unrestricted Hartree-Fock approximation. Its validity is discussed with the help of the Lanczos method applied to small systems. We find generally ambipolar carrier injections in Mott insulators even if the work function of the crystal is quite different from that of the electrodes. They result from balancing the correlation effect with the barrier effect. For the gate-bias polarity with higher Schottky barriers, the correlation effect is weakened accordingly, owing to collective transport in the one-dimensional correlated electron systems.

Affiliated with

Also associated with

No associations

Rating

Mechanism of Ambipolar Field-Effect Carrier Injections in One-Dimensional Mott Insulators does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Mechanism of Ambipolar Field-Effect Carrier Injections in One-Dimensional Mott Insulators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mechanism of Ambipolar Field-Effect Carrier Injections in One-Dimensional Mott Insulators will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-645859