25 citations · 47 across the 12 of their papers we have counts for
12 papers
From Embeddings to Dyson Series: Transformer Mechanics as Non-Hermitian Operator Theory
Po-Hao Chang
Transformer architectures are typically described in algorithmic and statistical terms, leaving their internal mechanics without a familiar structural language for researchers trai…
Is altermagnetism in vanadium oxychalcogenides a lost cause?
Bishal Thapa, Po-Hao Chang, Kirill Belashchenko +1
Vanadium-based oxychalcogenide compounds with the inverse Lieb-lattice (ILL) structural pattern have recently been proposed as candidate altermagnets (AM). However, early studies p…
Anisotropy, frustration and saddle point in the twisted Kagome antiferromagnet ErPdPb
Resham Babu Regmi, Sk Jamaluddin, Y. Lee +14
The kagome lattice, with its inherent geometric frustration, provides a rich platform for exploring intriguing magnetic phenomena and topological electronic structures. In reduced-…
Inverse Lieb Materials: Altermagnetism and More
Po-Hao Chang, Igor I. Mazin, Kirill D. Belashchenko
The Lieb lattice, originally proposed for cuprate superconductors, has gained new attention in the emerging field of altermagnetism as a minimal analytical model for the latter. Wh…
Modeling of a twisted-Kagome HoAgGe spin ice using Reduced-Configuration-Space Search and Density Functional Theory
Gunnar F. Schwertfeger, Po-Hao Chang, Predrag Nikolic +1
The Kagome lattice is a 2D network of corner sharing triangles found in several rare earth materials resulting in a complicated and often frustrated magnetic system. In the last de…
Doping-induced Spin Reorientation in Kagome Magnet TmMn6Sn6
Mohamed El Gazzah, Po-Hao Chang, Y. Lee +7
The kagome-lattice compounds RMn6Sn6 (R is a rare earth element), where the Mn atoms form a kagome net in the basal plane, are currently attracting a great deal of attention as the…
Three-dimensional nature of anomalous Hall conductivity in YMn6Sn6-xGax, x ~ 0.55
Hari Bhandari, Zhenhua Ning, Po-Hao Chang +8
The unique connectivity of kagome lattices gives rise to topological properties, such as flat bands and Dirac cones. When combined with ferromagnetism and a chemical potential near…
Tunable topological transitions in the frustrated magnet HoAgGe
Hari Bhandari, Po-Hao Chang, Resham Babu Regmi +5
The kagome lattice, known for its strong frustration in two dimensions, hosts a variety of exotic magnetic and electronic states. A variation of this geometry, where the triangular…
The mysterious magnetic ground state of Ba14MnBi11 is likely altermagnetic
Po-Hao Chang, Igor I. Mazin
Mn-based transition metal Zintl compounds in the 14-1-11 phase are known to host complex atomic and magnetic structures owing to their intricate crystal structure. Among them, Ba14…
Exploring Metamagnetism in Triangular Ising Networks: Insights from Further-Neighbor Interactions with a Case Study on ErGa2
Po-Hao Chang, Igor I. Mazin
The classical Ising model on the triangular lattice (we will call it I-3 model below), while simple in the nearest-neighbors (NN) only approximation, becomes increasingly richer an…
Voltage-controlled magnetic anisotropy in antiferromagnetic MgO-capped MnPt films
P. -H. Chang, W. Fang, T. Ozaki +1
The magnetic anisotropy in MgO-capped MnPt films and its voltage control are studied using first-principles calculations. Sharp variation of the magnetic anisotropy with film thick…
Origin of spin reorientation transitions in antiferromagnetic MnPt-based alloys
P. -H. Chang, I. A. Zhuravlev, K. D. Belashchenko
Antiferromagnetic MnPt exhibits a spin reorientation transition (SRT) as a function of temperature, and off-stoichiometric Mn-Pt alloys also display SRTs as a function of concentra…