Theory of the magnetoeletric effect in a lightly doped high-Tc cuprate

TY - JOUR

T1 - Theory of the magnetoeletric effect in a lightly doped high-Tc cuprate

AU - Mukherjee, Shantanu

AU - Andersen, Brian Møller

AU - Viskadourakis, Z.

AU - Radulov, I.

AU - Panagopoulos, C.

PY - 2012/4/12

Y1 - 2012/4/12

N2 - In a recent study, Viskadourakis (arXiv:1111.0050) discovered that extremely underdoped La 2CuO 4+x is a relaxor ferroelectric and a magnetoelectric material at low temperatures. It is further observed that the magnetoelectric response is anisotropic for different directions of electric polarization and applied magnetic field. By constructing an appropriate Landau theory, we show that a biquadratic magnetoelectric coupling can explain the experimentally observed polarization dependence on magnetic field. This coupling leads to several interesting low-temperature effects, including a feedback enhancement of the magnetization within the ferroelectric phase, and a predicted magnetocapacitive effect.

AB - In a recent study, Viskadourakis (arXiv:1111.0050) discovered that extremely underdoped La 2CuO 4+x is a relaxor ferroelectric and a magnetoelectric material at low temperatures. It is further observed that the magnetoelectric response is anisotropic for different directions of electric polarization and applied magnetic field. By constructing an appropriate Landau theory, we show that a biquadratic magnetoelectric coupling can explain the experimentally observed polarization dependence on magnetic field. This coupling leads to several interesting low-temperature effects, including a feedback enhancement of the magnetization within the ferroelectric phase, and a predicted magnetocapacitive effect.

U2 - 10.1103/PhysRevB.85.140405

DO - 10.1103/PhysRevB.85.140405

M3 - Journal article

SN - 2469-9950

VL - 85

SP - 140405

JO - Physical Review B

JF - Physical Review B

IS - 14

ER -