There is a bug in ChromeDriver that does not allow "Ctrl + T" from working.
But you can open a link in a new tab and then switch to new tab using switch_to.window().
Below is a sample code:
from selenium import webdriver
from selenium.webdriver import ActionChains
from selenium.webdriver.common.keys import Keys
driver = webdriver.Chrome()
driver.get("https://www.gmail.com")
# To open a link in a new tab
actions = Action(driver)
find = driver.find_element_by_link_text('ABC')
actions.key_down(Keys.CONTROL).click(find).key_up(Keys.CONTROL).perform()
driver.switch_to.window(driver.window_handles[-1])
driver.get("https://stackoverflow.com")
With this, the driver.get() would be performed in a newly opened tab.