226 citations · 1.1k across the 15 of their papers we have counts for
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Observation of magnetically switchable quantum geometric photocurrents
Qi Tian, Zhuoliang Ni, Matthew Cothrine +6
In non-centrosymmetric materials, light can be rectified into two types of DC photocurrents, known as injection and shift currents, through the bulk photovoltaic effect. Recent the…
Broad-band THz emission by Spin-to-Charge Conversion in Topological Material -- Ferromagnet Heterostructures
Xingyue Han, Xiong Yao, Tilak Ram Thapaliya +10
Terahertz spintronic devices combine ultrafast operation with low power consumption, making them strong candidates for next-generation memory technologies. In this study, we use ti…
Imprinting spin patterns by local strain control in a van der Waals antiferromagnet
Zhuoliang Ni, Huiqin Zhang, Qi Tian +6
Van der Waals magnets provide opportunities for exploring low-dimensional magnetism and spintronic phenomena. The Mermin-Wagner theorem states that long-range correlations in reduc…
Magnetic field control of continuous Néel vector rotation and Néel temperature in a van der Waals antiferromagnet
Zhuoliang Ni, Urban Seifert, Amanda V. Haglund +4
In a collinear antiferromagnet, spins tend to cant towards the direction of an applied magnetic field, thereby decreasing the energy of the system. The canting angle becomes neglig…
Kramers nodal lines and Weyl fermions in SmAlSi
Yichen Zhang, Yuxiang Gao, Xue-Jian Gao +16
Kramers nodal lines (KNLs) have recently been proposed theoretically as a special type of Weyl line degeneracy connecting time-reversal invariant momenta. KNLs are robust to spin o…
Observation of giant surface second harmonic generation coupled to nematic orders in the van der Waals antiferromagnet FePS
Zhuoliang Ni, Nan Huang, Amanda V. Haglund +2
Second harmonic generation has been applied to study lattice, electronic and magnetic proprieties in atomically thin materials. However, inversion symmetry breaking is usually requ…
Direct imaging of antiferromagnetic domains and anomalous layer-dependent mirror symmetry breaking in atomically thin MnPS
Zhuoliang Ni, Huiqin Zhang, David Hopper +8
We have developed a sensitive cryogenic second-harmonic generation microscopy to study a van der Waals antiferromagnet MnPS. We find that long-range Néel antiferromagnetic orde…
Imaging the Néel vector switching in the monolayer antiferromagnet MnPSe with strain-controlled Ising order
Zhuoliang Ni, A. V. Haglund, H. Wang +7
The family of monolayer two-dimensional (2D) materials hosts a wide range of interesting phenomena, including superconductivity, charge density waves, topological states and ferrom…
Giant topological longitudinal circular photo-galvanic effect in the chiral multifold semimetal CoSi
Zhuoliang Ni, K. Wang, Y. Zhang +10
The absence of mirror symmetry, or chirality, is behind striking natural phenomena found in systems as diverse as DNA and crystalline solids. A remarkable example occurs when chira…
Linear and nonlinear optical responses in the chiral multifold semimetal RhSi
Zhuoliang Ni, B. Xu, M. A. Sanchez-Martinez +8
Chiral topological semimetals are materials that break both inversion and mirror symmetries. They host interesting phenomena such as the quantized circular photogalvanic effect (CP…
Optical signatures of multifold fermions in the chiral topological semimetal CoSi
B. Xu, Z. Fang, M. A. Sánchez-Martínez +12
We report the optical conductivity in high-quality crystals of the chiral topological semimetal CoSi, which hosts exotic quasiparticles known as multifold fermions. We find that th…
Evolution of Weyl orbit and quantum Hall effect in Dirac semimetal Cd3As2
Cheng Zhang, Awadhesh Narayan, Shiheng Lu +14
Owing to the coupling between open Fermi arcs on opposite surfaces, topological Dirac semimetals exhibit a new type of cyclotron orbit in the surface states known as Weyl orbit. He…