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8 papers
Giant negative electrostriction and dielectric tunability in a van der Waals layered ferroelectric
Sabine M. Neumayer, Eugene A. Eliseev, Michael A. Susner +11
The interest in ferroelectric van der Waals crystals arises from the potential to realize ultrathin ferroic systems owing to the reduced surface energy of these materials and the l…
Predicted bulk photovoltaic effect in hydrogenated Zintl compounds
John A. Brehm
The bulk photovoltaic effect (BPVE) is a phenomenon which creates a net electrical current from sunlight in a polar noncentrosymmetric material possessing a moderate band gap. This…
Topolectrical circuit realization of topological corner modes
Stefan Imhof, Christian Berger, Florian Bayer +8
Quantized electric quadrupole insulators have recently been proposed as novel quantum states of matter in two spatial dimensions. Gapped otherwise, they can feature zero-dimensiona…
Topolectrical circuits
Ching Hua Lee, Stefan Imhof, Christian Berger +5
Invented by Alessandro Volta and Félix Savary in the early 19th century, circuits consisting of resistor, inductor and capacitor (RLC) components are omnipresent in modern technolo…
Substantial optical dielectric enhancement by volume compression in LiAsSe
Fan Zheng, John A. Brehm, Steve M. Young +2
Based on first-principles calculations, we predict a substantial increase in the optical dielectric function of LiAsSe under pressure. We find that the optical dielectric const…
First-Principles Calculation of the Bulk Photovoltaic Effect in the Polar Compounds LiAsS, LiAsSe, and NaAsSe
John A. Brehm, Steve M. Young, Fan Zheng +1
We calculate the shift current response, which has been identified as the dominant mechanism for the bulk photovoltaic effect, for the polar compounds LiAsS, LiAsSe$_\te…
The Structural Diversity of ABS3 Compounds with d0 Electronic Configuration for the B-cation
John A. Brehm, Joseph W. Bennett, Michael Rutenberg Schoenberg +2
We use first-principles density functional theory (DFT) within the local density approx- imation (LDA) to ascertain the ground state structure of real and theoretical compounds wit…
Density Functional Theory Study Of Hypothetical PbTiO3-Based Oxysulfides
John A. Brehm, Hiroyuki Takenaka, Chan-Woo Lee +4
Using density functional theory (DFT) within the local density approximation (LDA), we calculate the physical and electronic properties of PbTiO3 (PTO) and a series of hypothetical…