Chuyao Tong

Nov 8, 2024 | nature.com | Andraz Omahen |Michele Masseroni |Chuyao Tong |Rebekka Garreis |Jonas Gerber |Wister Wei Huang | +4 more

DeviceThe device is based on a stack of two-dimensional materials as illustrated on Fig. 1a, which was assembled using the standard dry transfer technique28,29,30. It consists of a 35 nm thick top hBN layer, the Bernal BLG sheet, a 28 nm thick bottom hBN, and a graphite backgate layer. The BLG was subsequently contacted with 1D edge contacts28. Three metallic top gates (3 nm Cr, 20 nm Au) were evaporated on top of the stack to define two conducting channels.

Oct 26, 2024 | nature.com | Michele Masseroni |Archisman Panigrahi |Felix R. Fischer |Chuyao Tong |Jonas Gerber |Takashi Taniguchi | +4 more

AbstractVan der Waals heterostructures provide a versatile platform for tailoring electronic properties through the integration of two-dimensional materials. Among these combinations, the interaction between bilayer graphene and transition metal dichalcogenides (TMDs) stands out due to its potential for inducing spin–orbit coupling (SOC) in graphene.

Jul 2, 2024 | link.aps.org | Chuyao Tong |Florian Ginzel |Annika Kurzmann

The spin degrees of freedom is crucial for the understanding of any condensed matter system. Knowledge of spin-mixing mechanisms is not only essential for successful control and manipulation of spin qubits, but also uncovers fundamental properties of investigated devices and material.

Jan 17, 2024 | nature.com | Rebekka Garreis |Chuyao Tong |Max Josef Ruckriegel |Jonas Gerber |Lisa Maria Gächter |Kenji Watanabe | +3 more

AbstractBilayer graphene is a promising platform for electrically controllable qubits in a two-dimensional material. Of particular interest is the ability to encode quantum information in the valley degree of freedom, a two-fold orbital degeneracy that arises from the symmetry of the hexagonal crystal structure. The use of valleys could be advantageous, as known spin- and orbital-mixing mechanisms are unlikely to be at work for valleys, promising more robust qubits.

Jan 11, 2024 | link.aps.org | Chuyao Tong |Annika Kurzmann |RWTH Aachen

Pauli blockade is a fundamental quantum phenomenon that also serves as a powerful tool for qubit manipulation and readout. While most systems exhibit a simple even-odd pattern of double-dot Pauli spin blockade due to the preferred singlet pairing of spins, the additional valley degree of freedom offered by bilayer graphene greatly alters this pattern.