Universal behavior of the bosonic metallic ground state in a two-dimensional superconductor

被引：14

作者：

Chen, Zhuoyu ^{[1
,2
,3
]}

Wang, Bai Yang ^{[1
,4
]}

Swartz, Adrian G. ^{[1
,2
,3
]}

Yoon, Hyeok ^{[1
,2
]}

Hikita, Yasuyuki ^{[1
,3
]}

Raghu, Srinivas ^{[1
,3
,4
]}

Hwang, Harold Y. ^{[1
,2
,3
]}

机构：

[1] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA

[2] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA

[3] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, Menlo Pk, CA 94025 USA

[4] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

来源：

NPJ QUANTUM MATERIALS | 2021年 / 6卷 / 01期

关键词：

D O I：

10.1038/s41535-021-00312-x

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Anomalous metallic behavior, marked by a saturating finite resistivity much lower than the Drude estimate, has been observed in a wide range of two-dimensional superconductors. Utilizing the electrostatically gated LaAlO3/SrTiO3 interface as a versatile platform for superconductor-metal quantum phase transitions, we probe variations in the gate, magnetic field, and temperature to construct a phase diagram crossing from superconductor, anomalous metal, vortex liquid, to the Drude metal state, combining longitudinal and Hall resistivity measurements. We find that the anomalous metal phases induced by gating and magnetic field, although differing in symmetry, are connected in the phase diagram and exhibit similar magnetic field response approaching zero temperature. Namely, within a finite regime of the anomalous metal state, the longitudinal resistivity linearly depends on the field while the Hall resistivity diminishes, indicating an emergent particle-hole symmetry. The universal behavior highlights the uniqueness of the quantum bosonic metallic state, distinct from bosonic insulators and vortex liquids.

引用

页数：6

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