Zeeman splitting of zero-bias anomaly in Luttinger liquids.
Tunneling density of states (DOS) in Luttinger liquid has a dip at zero energy, commonly known as the zero-bias anomaly. In the presence of a magnetic field, in addition to the zero-bias anomaly, the DOS develops two peaks separated from the origin by the Zeeman energy. We show that these finite-bias anomalies are characterized by a power-law behavior of the DOS and the differential conductance, and find the corresponding exponents at arbitrary strength of the electron-electron interaction. The developed theory is applicable to various kinds of quantum wires, including carbon nanotubes.
Shytov
A V
AV
Institute for Theoretical Physics, University of California, Santa Barbara, California 93106-4030, USA.
Glazman
L I
LI
Starykh
O A
OA