Yong P. Chen
Purdue University
PhysicsTopological insulatorGraphene nanoribbonsElectronNanotechnologyAtomic physicsMaterials scienceQuantum Hall effectCondensed matter physicsGrapheneSpectroscopyBose–Einstein condensateRaman spectroscopyOptoelectronicsLandau quantizationChemical vapor depositionQuantum mechanicsSurface statesSpin-½Thermal conductivity
Publications 450
#1Ting-Fung ChungH-Index: 19
#2Yang XuH-Index: 14
Last. Yong P. ChenH-Index: 64
view all 6 authors...
#1Morteza Kayyalha (Purdue University)H-Index: 8
#2Mehdi Kargarian (UMD: University of Maryland, College Park)H-Index: 17
Last. Yong P. ChenH-Index: 64
view all 8 authors...
We report anomalous enhancement of the critical current at low temperatures in gate-tunable Josephson junctions made from topological insulator BiSbTeSe_2nanoribbons with superconducting Nb electrodes. In contrast to conventional junctions, as a function of the decreasing temperature T the increasing critical current I_cexhibits a sharp upturn at a temperature T_*around 20\%of the junction critical temperatures for several different samples and various gate voltages. The I_cvs....
24 CitationsSource
#1Xiangyu Li (Purdue University)H-Index: 6
#2Wonjun Park (Purdue University)H-Index: 5
Last. Xiulin Ruan (Purdue University)H-Index: 45
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Interfacial thermal resistance between metal and dielectric materials is a bottleneck of the thermal management for modern integrated circuits as interface density increases with thinner films. In this work, we have observed that the interfacial resistance across gold and aluminum oxide can be reduced from 4.8 × 10 − 8 m 2 K / W to 1.4 × 10 − 8 m 2 K / W after adding a nickel layer in between, which represents a 70% reduction. The two temperature model is applied to explain the reduction of inte...
12 CitationsSource
#1Chuan-Hsun Li (Purdue University)H-Index: 4
#2Chunlei Qu (UTD: University of Texas at Dallas)H-Index: 16
Last. Yong P. Chen (Purdue University)H-Index: 64
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Understanding the effects of spin-orbit coupling (SOC) and many-body interactions on spin transport is important in condensed matter physics and spintronics. This topic has been intensively studied for spin carriers such as electrons but barely explored for charge-neutral bosonic quasiparticles (including their condensates), which hold promises for coherent spin transport over macroscopic distances. Here, we explore the effects of synthetic SOC (induced by optical Raman coupling) and atomic inte...
11 CitationsSource
#1Jung Woo Leem (Purdue University)H-Index: 27
#2Andres E. Llacsahuanga Allcca (Purdue University)H-Index: 2
Last. Young L. Kim (Purdue University)H-Index: 33
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We report an endogenous photoelectric biomolecule and demonstrate that such a biomolecule can be used to detect visible light. We identify the green pigment abundantly present in natural silk cocoons of Antheraea yamamai (Japanese oak silkmoth) as biliverdin, using mass spectroscopy and optical spectroscopy. Biliverdin extracted from the green silk cocoons generates photocurrent upon light illumination with distinct colors. We further characterize the basic performance, responsiveness, and stabi...
2 CitationsSource
#1Chuan-Hsun LiH-Index: 4
#2Yangqian YanH-Index: 9
Last. Yong P. ChenH-Index: 64
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Interplay between matter and fields in physical spaces with nontrivial geometries gives rise to many exotic quantum phenomena. However, their realizations are often impeded by experimental constraints. Here, we realize a Bose-Einstein condensate (BEC) on a synthetic cylindrical surface subject to a net radial synthetic magnetic flux, topologically equivalent to a two-dimensional (2D) Hall ribbon with two edges connected. This cylindrical surface comprises a real spatial dimension and a curved sy...
4 Citations
#1David Blasing (Purdue University)H-Index: 5
#2Jesús Pérez-Ríos (Universidad del Turabo)H-Index: 20
Last. Yong P. Chen (Purdue University)H-Index: 64
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: Coherent control of reactants remains a long-standing challenge in quantum chemistry. In particular, we have studied laser-induced molecular formation (photoassociation) in a Raman-dressed spin-orbit-coupled ^{87}Rb Bose-Einstein condensate, whose spin quantum state is a superposition of multiple bare spin components. In contrast to the notably different photoassociation-induced fractional atom losses observed for the bare spin components of a statistical mixture, a superposition state with a ...
11 CitationsSource
#1Jonghoon Ahn (Purdue University)H-Index: 9
#2Zhujing Xu (Purdue University)H-Index: 8
Last. Tongcang Li (Purdue University)H-Index: 26
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Atom-like defects in two-dimensional (2D) hexagonal boron nitride (hBN) have recently emerged as a promising platform for quantum information science. Here, we investigate single-photon emissions from atomic defects in boron nitride nanotubes (BNNTs). We demonstrate the first, to the best of our knowledge, optical modulation of the quantum emission from BNNTs with a near-infrared laser. This one-dimensional system displays a bright single-photon emission, as well as high stability at room temper...
12 CitationsSource
#1Ting-Fung ChungH-Index: 19
#2Yang XuH-Index: 14
Last. Yong P. ChenH-Index: 64
view all 3 authors...
We investigate electronic transport in twisted bilayer graphene (tBLG) under variable temperatures (T, carrier densities (n, and transverse magnetic fields, focusing on samples with small-twist-angles (\theta. These samples show prominent signatures associated with the van Hove singularities (VHSs) and superlattice-induced mini-gaps (SMGs). Temperature-dependent field effect measurement shows that the difference between temperature-dependent resistivity and residual resistivity, $\rho_{...
31 CitationsSource