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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on Bi2Pd(SeO3)4 by Materials Project

Bi2Pd(SeO3)4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Pd4+ is bonded in a square co-planar geometry to four O2- atoms. All Pd–O bond lengths are 2.04 Å. Bi3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Bi–O bond distances ranging from 2.31–2.87 Å. There are two inequivalent Se+3.50+ sites. In the first Se+3.50+ site, Se+3.50+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is two shorter (1.73 Å) and one longer (1.77 Å) Se–O bond length. In the second Se+3.50+ site, Se+3.50+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.72–1.77 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Bi3+ and one Se+3.50+ atom. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Pd4+, one Bi3+, and one Se+3.50+ atom. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Bi3+ and one Se+3.50+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent Bi3+ and one Se+3.50+ atom. In the fifth O2- site, O2- is bonded in a water-like geometry to one Pd4+ and one Se+3.50+ atom. In the sixth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Bi3+ and one Se+3.50+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca3(Bi2Pd)4 by Materials Project

Ca3(PdBi2)4 crystallizes in the orthorhombic Pbam space group. The structure is three-dimensional. there are two inequivalent Ca sites. In the first Ca site, Ca is bonded in a distorted q6 geometry to two equivalent Pd and eight Bi atoms. Both Ca–Pd bond lengths are 3.12 Å. There are four shorter (3.36 Å) and four longer (3.45 Å) Ca–Bi bond lengths. In the second Ca site, Ca is bonded in a 12-coordinate geometry to four Pd and eight Bi atoms. There are a spread of Ca–Pd bond distances ranging from 3.15–3.19 Å. There are a spread of Ca–Bi bond distances ranging from 3.39–3.76 Å. There are two inequivalent Pd sites. In the first Pd site, Pd is bonded in a 9-coordinate geometry to two equivalent Ca, one Pd, and six Bi atoms. The Pd–Pd bond length is 2.88 Å. There are a spread of Pd–Bi bond distances ranging from 2.83–3.06 Å. In the second Pd site, Pd is bonded in a 9-coordinate geometry to three Ca and six Bi atoms. There are a spread of Pd–Bi bond distances ranging from 2.89–2.96 Å. There are four inequivalent Bi sites. In the first Bi site, Bi is bonded in a 3-coordinate geometry to four equivalent Ca and three Pd atoms. In the second Bi site, Bi is bonded in a 9-coordinate geometry to four Ca and two equivalent Pd atoms. In the third Bi site, Bi is bonded in a 4-coordinate geometry to four equivalent Pd atoms. In the fourth Bi site, Bi is bonded in a 7-coordinate geometry to four Ca and three Pd atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Bi2Pd by Materials Project

PdBi2 crystallizes in the monoclinic C2/m space group. The structure is two-dimensional and consists of two PdBi2 sheets oriented in the (1, 0, 0) direction. Pd is bonded in a 9-coordinate geometry to two equivalent Pd and seven Bi atoms. Both Pd–Pd bond lengths are 2.89 Å. There are a spread of Pd–Bi bond distances ranging from 2.89–3.10 Å. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded in a 4-coordinate geometry to four equivalent Pd atoms. In the second Bi site, Bi is bonded in a 3-coordinate geometry to three equivalent Pd atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Bi2Pd by Materials Project

PdBi2 crystallizes in the tetragonal I4/mmm space group. The structure is two-dimensional and consists of two PdBi2 sheets oriented in the (0, 0, 1) direction. Pd is bonded in a body-centered cubic geometry to eight equivalent Bi atoms. All Pd–Bi bond lengths are 3.00 Å. Bi is bonded in a 4-coordinate geometry to four equivalent Pd atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Anomalous transverse resistance in the topological superconductor β-Bi2Pd

Abstract A supercurrent flowing in a superconductor meets no resistance. Yet an electric field may still be established within the superconductor in the presence of dissipative processes, such as vortex motion. Here we report the observation of a transverse voltage drop in superconducting β- Bi 2 Pd thin films. Unlike the Hall effect in general or in other superconductors, the sign of the observed transverse voltage does not depend on the external magnetic field. Instead, it is dictated by the broken inversion symmetry on the film interfaces. This anomalous transverse voltage, or transverse resistance, is indicative of a chirality that likely resonates with the topological surface states reported in β- Bi 2 Pd.

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗
DOE OSTI2026

Microscopic Scattering Approach to In-Gap States

We develop a microscopic scattering formalism to describe Yu-Shiba-Rusinov (YSR) states due to a single Cr adatom on the Bi-terminated surface of beta Bi2Pd, by combining ab initio Wannier functions with a real-space Green's function approach in the Bogoliubov-de Gennes formalism[1]. Our framework reproduces key scanning tunneling spectroscopy features, including a single particle-hole asymmetric YSR peak and isotropic dIdV maps around the impurity. Decomposing the YSR states reveals contributions from four nearly degenerate C4v representations, with energy broadening masking their individual signatures. Spin-orbit coupling induces partial spin polarization, while the spatial asymmetry between particle and hole components arises from Cr d-Bi p hybridization. These results highlight the importance of realistic band structures and microscopic modeling for interpreting STM data for magnetic in-gap states on superconductors. Further advances examining layered 2D material surfaces, such as NbSe2, will be described[2]. For this system the superconducting properties are obtained from a full anisotropic Eliashberg calculation of the superconducting order parameter along with the charge density wave gap. Additional features associated with proposals to measure the dynamics of these individual YSR states will be presented. [1] arXiv:2507.08740 [2] arXiv:2507.11856

75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND↗