Effect of magnetic and electric field on the ground state properties of weak coupling piezoelectric polaron in a quantum well with asymmetric Gaussian confinement

• Published in: Physics letters. A 2024-11, Vol.526, p.129948, Article 129948
• Main Authors: Vemula, Swapna, Kachu, Anusha, Angoth, Thara, Boda, Aalu
• Format: Article
• Language: English
• Subjects: Asymmetric Gaussian confinement; Binding energy; Piezoelectric polaron; Polarizability; Quantum well; Susceptibility
• ISSN: 0375-9601
• DOI: 10.1016/j.physleta.2024.129948

•We study the ground state properties of a piezoelectric polaron in a QW with AGC in the presence of the magnetic and electric fields.•We rigorously determine the ground state and ground state binding energies using a variational method.•The magnetic moment, susceptibility, and polarizability are also determined.•It is found that B,F,V0,R,α, and q0 are crucial factors that significantly affect the magnetic and optical properties of piezoelectric polaron. In this study, we employed the linear combination operation and a modified Lee-Low-Pines unitary transformation method to explore the ground state properties of an interacting electron coupled with piezo-acoustic phonons within a quantum well featuring asymmetric Gaussian confinement potential well under the influence of magnetic and electric fields. We calculated various properties, including the ground state energy, ground state binding energy, magnetic moment, magnetic susceptibility, and polarizability of the weakly coupled piezoelectric polaron. The effects of the magnetic and electric fields, electron-phonon weak coupling strength, Debye cut-off wavenumber, and confinement depth and range on these properties were thoroughly analyzed. Our findings reveal that the ground state energy decreases with increasing the Debye wavenumber, confinement range, and electron-phonon weak coupling strength. In contrast, the ground state binding energy shows the opposite trend, increasing with these parameters. Furthermore, the magnetic and electric fields, confinement depth and range, electron-phonon coupling strength, and Debye wavenumber are critical factors that significantly impact the magnetic and optical properties of the piezoelectric polaron.