Our research focuses on the discovery, synthesis, and characterization of novel single-crystal quantum materials for fundamental condensed matter physics and advanced functional applications. Our work emphasizes the development of high-quality bulk crystals to enable intrinsic-property measurements free of grain-boundary and disorder effects. Over the past five years, our research group has successfully developed and optimized advanced crystal growth techniques, including optical floating-zone, infrared furnace, and Bridgman methods, to produce single crystals of topological materials, Dirac and Weyl semimetals, topological insulators, thermoelectric compounds, and unconventional superconductors. A central theme of our research is the interplay between crystal symmetry, topology, magnetism, and electronic correlation. My work has contributed to the understanding of defect-induced electronic states, symmetry-protected band crossings, and structure-driven topological phase transitions. The laboratory maintains strong collaborations with international synchrotron radiation facilities, enabling comprehensive studies using Angle-Resolved Photoemission Spectroscopy (ARPES), Spin-ARPES, Resonant and Inelastic X-ray Scattering, and ultrafast spectroscopy. These combined efforts bridge crystal growth, electronic structure measurements, and theoretical modeling to validate topological and correlated quantum phenomena. Our research program integrates materials synthesis and advanced spectroscopy to advance Taiwan’s capabilities in quantum materials research and next-generation energy and electronic technologies.

The Raman Sankar Laboratory in the Institute of Physics, Academia Sinica, is dedicated to the synthesis and investigation of high-quality single-crystal quantum materials. The laboratory focuses on materials where reduced dimensionality, strong spin–orbit coupling, electron correlation, and symmetry breaking give rise to emergent physical phenomena. The primary research systems include Dirac and Weyl semimetals, topological insulators, topological crystalline insulators, strongly correlated electron systems, quantum magnets, high-temperature superconductors, thermoelectric materials, and layered two-dimensional compounds. In our laboratory, we emphasize that precise control over crystal growth is essential for revealing intrinsic quantum phenomena. Many groundbreaking discoveries in topological physics and superconductivity have relied critically on high-quality single crystals suitable for ARPES, neutron scattering, STM, and transport measurements. Our group operates advanced crystal growth facilities and performs systematic structural, transport, and spectroscopic characterization. Through collaborations with synchrotron and large-scale facilities, the laboratory investigates band topology, spin texture, electron–phonon coupling, and many-body interactions in quantum materials. In our lab, our long-term goal is to design and discover materials with tunable topology, enhanced thermoelectric performance, unconventional superconductivity, and novel quantum states of matter.