201 citations · 762 across the 13 of their papers we have counts for
13 papers
Twist angle dependent interlayer transfer of valley polarization from excitons to free charge carriers in WSe/MoSe heterobilayers
Frank Volmer, Manfred Ersfeld, Paulo E. Faria Junior +13
We identify an optical excitation mechanism that transfers a valley polarization from photo-excited electron-hole pairs to free charge carriers in twisted WSe/MoSe heterobi…
Dipolar interactions between field-tuneable, localized emitters in van der Waals heterostructures
Weijie Li, Xin Lu, Sudipta Dubey +2
While photons in free space barely interact, matter can mediate interactions between them resulting in optical nonlinearities. Such interactions at the single-quantum level result…
Optical control of a single spin-valley in charged WSe quantum dots
Xin Lu, Xiaotong Chen, Sudipta Dubey +4
Control and manipulation of single charges and their internal degrees of freedom, such as spins, is a fundamental goal of nanoscience with promising technological applications. Rec…
Coherence and density dynamics of excitons in a single-layer MoS reaching the homogeneous limit
Tomasz Jakubczyk, Goutham Nayak, Lorenzo Scarpelli +13
We measure the coherent nonlinear response of excitons in a single-layer of molybdenum disulphide embedded in hexagonal boron nitride, forming a -BN/MoS/-BN heterostructu…
Entanglement of single-photons and chiral phonons in atomically thin WSe
Xiaotong Chen, Xin Lu, Sudipta Dubey +6
Quantum entanglement is a fundamental phenomenon which, on the one hand, reveals deep connections between quantum mechanics, gravity and the space-time; on the other hand, has prac…
Weakly Trapped, Charged, and Free Excitons in Single-Layer MoS2 in the Presence of Defects, Strain, and Charged Impurities
Sudipta Dubey, Simone Lisi, Goutham Nayak +17
Few- and single-layer MoS2 host substantial densities of defects. They are thought to influence the doping level, the crystal structure, and the binding of electron-hole pairs. We…
Effect of aging-induced disorder on the quantum transport properties of atomically thin WTe
W. L. Liu, M. L. Chen, X. X. Li +15
Atomically thin layers of transition-metal dicalcogenides (TMDCs) are often known to be metastable in the ambient atmosphere. Understanding the mechanism of degradation is essentia…
Tuning equilibration of quantum Hall edge states in graphene - role of crossed electric and magnetic fields
Sudipta Dubey, Mandar M. Deshmukh
We probe quantum Hall effect in a tunable 1-D lateral superlattice (SL) in graphene created using electrostatic gates. Lack of equilibration is observed along edge states formed by…
Limits on the Bolometric response of Graphene due to flicker noise
Sameer Grover, Sudipta Dubey, John P. Mathew +1
We study the photoresponse of graphene field effect transistors using scanning photocurrent microscopy in near and far field configurations, and we find that the response of graphe…
Tunable Superlattice in Graphene To Control the Number of Dirac Points
Sudipta Dubey, Vibhor Singh, Ajay K. Bhat +6
Superlattice in graphene generates extra Dirac points in the band structure and their number depends on the superlattice potential strength. Here, we have created a lateral superla…
A facile process for soak-and-peel delamination of CVD graphene from substrates using water
Priti Gupta, Pratiksha D. Dongare, Sameer Grover +4
We demonstrate a simple technique to transfer CVD-grown graphene from copper and platinum substrates using a soak-and-peel delamination technique utilizing only hot deionized water…
Coupling between quantum Hall state and electromechanics in suspended graphene resonator
Vibhor Singh, Bushra Irfan, Ganesh Subramanian +6
Using graphene resonator, we perform electromechanical measurements in quantum Hall regime to probe the coupling between a quantum Hall (QH) system and its mechanical motion. Mecha…
High Q electromechanics with InAs nanowire quantum dots
Hari S. Solanki, Shamashis Sengupta, Sudipta Dubey +7
In this report, we study electromechanical properties of a suspended InAs nanowire (NW) resonator. At low temperatures, the NW acts as the island of a single electron transistor (S…