Prevailing Charge Order in Overdoped La_{2-x}Sr_{x}CuO_{4} beyond the Superconducting Dome.

The extremely overdoped cuprates are generally considered to be Fermi liquid metals without exotic orders, whereas the underdoped cuprates harbor intertwined states. Contrary to this conventional wisdom, using Cu L_{3}-edge and O K-edge resonant x-ray scattering, we reveal a charge order (CO) correlation in overdoped La_{2-x}Sr_{x}CuO_{4} (0.35≤x≤0.

Two-Dimensional Superconductivity at the LaAlO_{3}/KTaO_{3}(110) Heterointerface.

We report on the observation of a T_{c}∼0.9  K superconductivity at the interface between LaAlO_{3} film and the 5d transition metal oxide KTaO_{3}(110) single crystal. The interface shows a large anisotropy of the upper critical field, and its superconducting transition is consistent with a Berezinskii-Kosterlitz-Thouless transition.

Unravelling oxygen-vacancy-induced electron transfer at SrTiO-based heterointerfaces by transport measurement during growth.

Numerous studies have shown that oxygen vacancies play an important role on the formation of two-dimensional electron gas (2DEG) at SrTiO-based heterointerfaces. Previously, it is widely believed that the main mechanism is that the oxygen vacancies in SrTiO directly contribute electrons to the 2DEG. Here, we performed transport measurements during the creation of 2DEG for depositing amorphous LaAlO on SrTiO substrates and related heterostructures.

A termination-insensitive and robust electron gas at the heterointerface of two complex oxides.

The single-crystal SrTiO (001) has two different surface terminations, TiO and SrO. One most remarkable observation in previous studies is that only the heterointerfaces with TiO-terminated SrTiO, which usually combines with polar oxides such as LaAlO, host an electron gas. Here we show that a robust electron gas can be generated between a non-polar oxide, CaHfO, and SrTiO (001) with either termination.