Abstract
A metal-insulator crossover appears in the experimental data for in-plane resistivity of underdoped cuprates and a range of superconducting cuprates in the presence of a strong magnetic field suppressing superconductivity. We propose an explanation for this phenomenon based on a gauge field theory approach to the t-J model. In this approach, based on a formal spin-charge separation, the low energy effective action describes gapful spinons (with a theoretically derived doping dependence of the gap m 2s ∼ δ¦ ln δ¦) and holons with finite Fermi surface (ɛF ∼ tδ) interacting via a gauge field whose basic effect on the spinons is to bind them into overdamped spin waves, shifting their gap by a damping term linear in T, which causes the metal-insulator crossover. The presence of a magnetic field perpendicular to the plane acts by increasing the damping, in turn producing a big positive transverse in-plane magnetoresistance at low T, as experimentally observed.
Similar content being viewed by others
References
H Takagi et al, Phys. Rev. Lett. 69, 2975 (1992)
B Wuyts et al, Phys. Rev. B53, 9418 (1996)
B Keimer et al, Phys. Rev. B46, 14034 (1992)
B Wuyts et al, Phys. Rev. B53, 9418 (1996)
T Kimura et al, Phys. Rev. B53, 8733 (1996)
Y Abe et al, Phys. Rev. B59, 14753 (1999)
A Lacerda et al, Phys. Rev. B49, 9097 (1994)
P Fournier et al, Phys. Rev. Lett. 81, 4720 (1998)
S Ono et al, Phys. Rev. Lett. 85, 638 (2000)
K Segasawa and Y Ando, Phys. Rev. B59, R3948 (1999)
Y Ando et al, Phys. Rev. Lett. 75, 4662 (1995)
G S Boebinger et al, Phys. Rev. Lett. 77, 5417 (1996)
Y Ando et al, J. Low Temp. Phys. 105, 867 (1996)
L Ioffe and A Larkin, Phys. Rev. B39, 8988 (1989)
J Fröhlich et al, Nucl. Phys. B374, 511 (1992)
J Fröhlich and P A Marchetti, Phys. Rev. B46, 6535 (1992)
P A Marchetti, Z B Su and L Yu, Phys. Rev. B58, 5808 (1998)
P A Lee and N Nagaosa, Phys. Rev. Lett. 65, 2450 (1990); Phys. Rev. B46, 5621 (1992)
L B Ioffe and P B Wiegman, Phys. Rev. Lett. 65, 653 (1990)
P A Marchetti et al, J. Phys. Condens. Matter 12, L329 (2000)
P A Marchetti, Z B Su, L Yu, Phys. Rev. Lett. 86, 3831 (2001)
L Ioffe and G Kotliar, Phys. Rev. B42, 10348 (1990)
L Ioffe and P Wiegmann, Phys. Rev. B45, 519 (1992)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Marchetti, P., Su, Z. & Yu, L. Metal-insulator crossover in high T c cuprates: A gauge field approach. Pramana - J Phys 58, 803–808 (2002). https://doi.org/10.1007/s12043-002-0175-4
Issue Date:
DOI: https://doi.org/10.1007/s12043-002-0175-4