Eur. Phys. J. B 78, 481-488 (2010)
https://doi.org/10.1140/epjb/e2010-10698-2

Manipulating the Tomonaga-Luttinger exponent by electric field modulation

¹ Division of Applied Physics, Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Hokkaido, Japan
² Department of Applied Mathematics 3, LaCàN, Universitat Politèchnica de Catalunya, 08034 Barcelona, Spain
³ Division of Applied Physics, Graduate School of Engineering, Hokkaido University, Sapporo, 060-8628, Hokkaido, Japan
⁴ Department of Physics, Nara Women's University, 630-8506, Nara, Japan

Corresponding author: ^a shima@eng.hokudai.ac.jp

Received: 13 September 2010
Revised: 29 October 2010
Published online: 6 December 2010

Abstract

We establish a theoretical framework for artificial control of the power-law singularities in Tomonaga-Luttinger liquid states. The exponent governing the power-law behaviors is found to increase significantly with an increase in the amplitude of spatially periodic electrostatic field applied to the system. This field-induced shift in the exponent indicates the tunability of the transport properties of quasi-one-dimensional electron systems.